By Y. Brontobb.
CONTENTS Primary intention-to-treat analysis of body mass index standard deviation score at 24 months 28 Model diagnostics for the primary analysis of body mass index standard deviation score at 24 months 29 Secondary analysis of body mass index standard deviation score at 24 months 29 Subgroup analyses of body mass index standard deviation score at 24 months 30 Longitudinal analysis of body mass index standard deviation score 31 Primary analyses of secondary outcomes at 24 months (anthropometric measures only) 32 Primary analyses of outcomes at 18 months 32 Model diagnostics for the primary analysis of the secondary outcomes 37 Intraclass correlation coefficients 39 Complier average causal effect analysis 39 Chapter 4 Economic evaluation 41 Introduction 41 Methods 41 Estimating resource use and costs for delivery of the HeLP intervention 41 Development of modelling framework (Exeter Obesity Model) to estimate the cost-effectiveness of the HeLP intervention versus usual practice 44 Results 44 Estimating the resource use and cost of the HeLP intervention 44 A framework for the economic evaluation of HeLP 49 Discussion 68 Chapter 5 Process evaluation 71 Introduction 71 Aims 71 Research questions 71 Logic model 71 General methods 73 Section 1: process data collected from the intervention arm of the trial 73 Methods 73 Results 77 Summary 90 Section 2: mediation analyses 91 Background 91 Methods 91 Results 94 Summary 99 Conclusions from the process evaluation 100 Chapter 6 Discussion and conclusions 101 Summary of findings 101 Comparison with other studies 101 Understanding the lack of effectiveness 102 Trial strengths and limitations 103 Research recommendations 104 Conclusions 105 Acknowledgements 107 References 111 Appendix 1 Trial Steering Committee 121 x NIHR Journals Library www plaquenil 200mg with amex reactive arthritis definition. This issue may be freely reproduced for the purposes of private research and study and extracts (or indeed generic plaquenil 200mg without a prescription rheumatoid arthritis big toe, the full report) may be included in professional journals xi provided that suitable acknowledgement is made and the reproduction is not associated with any form of advertising buy 200mg plaquenil visa rheumatoid arthritis hand x ray. Applications for commercial reproduction should be addressed to: NIHR Journals Library, National Institute for Health Research, Evaluation, Trials and Studies Coordinating Centre, Alpha House, University of Southampton Science Park, Southampton SO16 7NS, UK. This issue may be freely reproduced for the purposes of private research and study and extracts (or indeed, the full report) may be included in professional journals xiii provided that suitable acknowledgement is made and the reproduction is not associated with any form of advertising. Applications for commercial reproduction should be addressed to: NIHR Journals Library, National Institute for Health Research, Evaluation, Trials and Studies Coordinating Centre, Alpha House, University of Southampton Science Park, Southampton SO16 7NS, UK. LIST OF TABLES TABLE 18 Unit costs (GBP) used to estimate cost of delivery of HeLP intervention 43 TABLE 19 Summary of school level characteristics for delivery of HeLP 45 TABLE 20 Resource use by staff type by type of contact (preparation, task and travel): total across 16 schools, 27 classes 46 TABLE 21 Resource use by school–class configuration: resource use by staff type and by type of contact (preparation, task and travel) 47 TABLE 22 Estimated cost (GBP) for delivery of HeLP (total cost across 16 schools, 27 classes) 48 TABLE 23 Estimated total cost (GBP) for delivery of HeLP by school-class configuration: one school and one, two and three classes 48 TABLE 24 Sensitivity analysis 1: estimated cost (GBP) for delivery of HeLP (total cost across 16 schools, 27 classes) using a higher unit cost (£25. This issue may be freely reproduced for the purposes of private research and study and extracts (or indeed, the full report) may be included in professional journals xv provided that suitable acknowledgement is made and the reproduction is not associated with any form of advertising. Applications for commercial reproduction should be addressed to: NIHR Journals Library, National Institute for Health Research, Evaluation, Trials and Studies Coordinating Centre, Alpha House, University of Southampton Science Park, Southampton SO16 7NS, UK. This issue may be freely reproduced for the purposes of private research and study and extracts (or indeed, the full report) may be included in professional journals xvii provided that suitable acknowledgement is made and the reproduction is not associated with any form of advertising. Applications for commercial reproduction should be addressed to: NIHR Journals Library, National Institute for Health Research, Evaluation, Trials and Studies Coordinating Centre, Alpha House, University of Southampton Science Park, Southampton SO16 7NS, UK. This issue may be freely reproduced for the purposes of private research and study and extracts (or indeed, the full report) may be included in professional journals xix provided that suitable acknowledgement is made and the reproduction is not associated with any form of advertising. Applications for commercial reproduction should be addressed to: NIHR Journals Library, National Institute for Health Research, Evaluation, Trials and Studies Coordinating Centre, Alpha House, University of Southampton Science Park, Southampton SO16 7NS, UK. This issue may be freely reproduced for the purposes of private research and study and extracts (or indeed, the full report) may be included in professional journals xxi provided that suitable acknowledgement is made and the reproduction is not associated with any form of advertising. Applications for commercial reproduction should be addressed to: NIHR Journals Library, National Institute for Health Research, Evaluation, Trials and Studies Coordinating Centre, Alpha House, University of Southampton Science Park, Southampton SO16 7NS, UK. Working with teachers, families and children, we C developed the Healthy Lifestyles Programme (HeLP), which aims to engage and support children and families to make healthy food and activity choices. We designed a study to understand whether or not HeLP can prevent children aged 9–10 years from becoming overweight or obese. The study involved 32 primary schools from Devon, half of which were randomly selected to receive the programme while the other half continued as usual. We also asked what they understood about a healthy lifestyle and how they felt about it. The study began when the children were 9–10 years old, in Year 5, and HeLP was delivered in the spring and summer terms of Year 5 and in the autumn term of Year 6. Children had their final set of measurements taken when they were at secondary school (aged 11–12 years). We were able to follow up 94% of children for their final set of measurements, an exceptionally high follow-up rate; we think that this is because schools, children and families helped us design the trial. There was no difference in the amount of physical activity children did or in the amount of time they spent not being active. We saw a positive difference in some snacking behaviours, with children who had taken part in HeLP eating fewer unhealthy snacks and having less unhealthy foods generally. Given that the programme failed to achieve sufficient change in behaviour to prevent overweight or obesity, we think that new approaches are needed to support families and children in making healthy lifestyle choices. This issue may be freely reproduced for the purposes of private research and study and extracts (or indeed, the full report) may be included in professional journals xxiii provided that suitable acknowledgement is made and the reproduction is not associated with any form of advertising. Applications for commercial reproduction should be addressed to: NIHR Journals Library, National Institute for Health Research, Evaluation, Trials and Studies Coordinating Centre, Alpha House, University of Southampton Science Park, Southampton SO16 7NS, UK. The intervention was developed using intervention mapping (involving extensive stakeholder involvement) and was guided by the information, motivation and behavioural skills (IMB) model. The intervention has four phases and runs over three school terms with 9- to 10-year-old children. HeLP aims to engage children, parents and schools through a mixture of educational activities, drama, goal-setting and reinforcement activities to help children to increase healthy behaviours and reduce the risk of overweight and obesity. Objectives To estimate the effectiveness and cost-effectiveness of HeLP in preventing overweight and obesity in children. To assess the effectiveness of HeLP in children aged 9–10 years by comparing between intervention and control schools: ¢ body mass index (BMI) standard deviation score (SDS) at 24 months (primary outcome) ¢ BMI SDS at 18 months ¢ waist circumference SDS at 18 and 24 months ¢ percentage body fat SDS at 18 and 24 months ¢ proportion of children classified as underweight, overweight and obese at 18 and 24 months ¢ physical activity [time, in average minutes per day, spent in sedentary, light, moderate, moderate to vigorous or vigorous physical activity, and the average volume of physical activity in milligravity (mg) units] at 18 months ¢ food intake (number of energy-dense snacks, healthy snacks, negative and positive food markers) at 18 months. To estimate the costs associated with the delivery of the HeLP intervention and its cost-effectiveness versus usual practice. To conduct a mixed-methods process evaluation and a mediational analysis to explore the way in which the programme worked (i. Methods We undertook a cluster randomised controlled trial with follow-up at 18 and 24 months post baseline (6 and 12 months post intervention) in 32 primary schools in Devon that had at least 20 pupils in Year 5 (aged 9–10 years). We aimed to recruit half of the schools with ≥ 19% pupils eligible for free school meals (the national average in 2012). Schools were randomised post collection of baseline measures. Schools allocated to receive HeLP started the programme in the spring term of Year 5 with phase 1 activities to create a receptive context in the school and to engage the children and their families. This issue may be freely reproduced for the purposes of private research and study and extracts (or indeed, the full report) may be included in professional journals xxv provided that suitable acknowledgement is made and the reproduction is not associated with any form of advertising. Applications for commercial reproduction should be addressed to: NIHR Journals Library, National Institute for Health Research, Evaluation, Trials and Studies Coordinating Centre, Alpha House, University of Southampton Science Park, Southampton SO16 7NS, UK. SCIENTIFIC SUMMARY activities (phase 4) took place in the autumn term of Year 5. Schools allocated to the control group continued with their standard syllabus. For practical reasons, the trial was run over two cohorts (each with 16 schools). The primary outcome was BMI SDS at 24 months post baseline. The secondary outcomes were BMI SDS at 18 months, waist circumference SDS and percentage body fat SDS, weight status category at 18 and 24 months, accelerometer-assessed physical activity and child-reported consumption of food and drink (averaged across the week, as well as for weekday and weekend separately). Children had 18-month measures taken at the end of Year 6 (aged 10–11 years) and in the autumn term of Year 7 (aged 11–12 years) when the children had moved to secondary school. Potential mediators were assessed using a bespoke questionnaire that was underpinned by the IMB model and was developed to capture knowledge, cognitions and behaviours that we anticipated would be related to changing diet and physical activity and, hence, weight status. We collected details on the cost of the intervention and developed a framework for estimating the cost-effectiveness of the intervention. Questionnaires, focus groups and interviews were conducted with parents, teachers, head teachers and children, and observations of intervention delivery were conducted to assess how HeLP was delivered and received, as well as the experience of being part of the programme. Only 34 eligible children opted out of the study and we had a rate of 94% follow-up for our primary outcome at 24 months. No difference was found between children in the intervention schools and children in the control schools at 24 months for BMI SDS [mean difference (intervention minus control) –0. Children in the intervention schools reported eating significantly fewer energy-dense snacks per day (–0. These differences were also evident for weekday, but not weekend, reporting of energy-dense snacks and negative food markers.
These patients typically com- juveniles diagnosed with both substance abuse and conduct plained of being unable to stop or to decrease their mari- disorders have serious problems related to cannabis 200mg plaquenil overnight delivery arthritis diet dogs, and juana use despite experiencing sleepiness order plaquenil in india rheumatoid arthritis and back pain, depression purchase 200mg plaquenil overnight delivery arthritis in neck c5 and c6, inabil- most met standard adult criteria for cannabis dependence ity to concentrate, and memorization difficulties that they (25). Two-thirds of these cannabis-dependent patients re- directly attributed to marijuana exposure. The data indicate that for adolescents ies reported similar problems in daily users of marijuana with conduct problems, cannabis use is not benign. Several groups of investigators have used DSM-III-R risk factors may also contribute. With regard to prevalence of marijuana abuse and use, abuse, and dependence as defined by DSM-IV criteria dependence, the strongest evidence was provided by the (26). These investigators concluded that in women, genetic Epidemiological Catchment Area study involving 20,000 risk factors have a moderate impact on the probability of persons in five geographic areas of the United States (21). By contrast, marijuana abuse or dependence, and three-fifths of these the family and social environment substantially influences met the criteria for dependence. After an extensive review risk of ever using cannabis but plays little role in the proba- of the literature, Hall et al. Early attempts to demonstrate spontaneous with- Kandel and Davies estimated that the risk of dependence drawal after cessation of chronic marijuana or THC treat- in near-daily marijuana users was one in three (17). Factors that have been associated with marijuana depen- The physical withdrawal syndrome for cannabinoids and dence include poor academic achievement, deviant behav- opioids in rodents shares many of the same characteristics. It ior, rebelliousness, maladjustment, difficult parental rela- is also clear that, in humans, THC is an essential reinforcing tions, early initiation of drug use, and family history of drug component in marijuana (31). The major complaints by marijuana-dependent per- abused by humans, it has been difficult to train animals to sons are loss of control over drug use, cognitive and motiva- self-administer cannabinoids. Although the physical charac- tional impairments, lowered self-esteem, depression, and teristics of cannabinoids probably contribute to this diffi- spousal discord. The risk of cannabis abuse and dependence culty, the general opinion persists that cannabinoids lack was found to increase with the frequency of smoking occa- rewarding effects and therefore are devoid of dependence sions and slightly decreased with age (22). Virtually all striatal projection neurons contain CB1 warding and aversive effects, depending on the concentra- mRNA, which is also expressed in putative GABAergic in- tion used. It may well be that these dual properties have terneurons that enable functional interactions between the hindered the development of a THC model of self-adminis- direct and indirect striatal output pathways (41). Nevertheless, these studies clearly demonstrate that mRNA is found in striatonigral neurons that contain dynor- cannabinoid self-administration is not confined to humans. The presence of CB1 receptors in sensory (42) and auto- Cannabinoid Receptors nomic peripheral fibers (43,44) has been reported. CB1 re- It is now widely recognized that most of the neurobehavioral ceptors seem to be mostly restricted to spinal interneurons, and peripheral actions of marijuana and THC result from rather than at the axonal level (45), thus possibly accounting activation of selective receptors, two of which, named CB1 for spinal mechanisms of pain control ascribed to psycho- and CB2, have been cloned and characterized (33,34). However, indirect evidence also exists development of transgenic mice lacking the genes encoding for the presence of CB1 receptors in peripheral sensory affer- for either of these two receptors, the CB1 and CB2-receptor ents (46), a finding thus supporting the concept that canna- knockout mice (35–37), have provided conclusive evidence binoids may also exert analgesia at the peripheral level. The that the effects of THC on motor behavior, body tempera- presence of CB1 receptors in parasympathetic and sympa- ture, cardiovascular function, and nociception, on the one thetic fibers, on the other hand, may be at the basis of hand, and on some immunologic responses, on the other the vascular and smooth muscle–relaxing activity of THC hand, are mediated by CB1 and CB2 receptors, respectively. There is no evidence for the pres- malian tissues and have been found not only in the central ence of CB2 receptors in the central nervous system, except and peripheral nervous systems, but also in both male and for their expression in microglia. Clearly, given that CB2 female reproductive organs, immune cells, the gastrointesti- receptors seem to be mostly confined to cells of the immune nal tract, the liver, and the heart (38). In the central nervous system (34), it would not be surprising to find these proteins system, CB1 receptors are most abundant in the hippocam- only in those central nervous system cells deputed to im- pus (i. Lower density of CB1 receptors is present Studies have revealed that activation of the subunits of G /i in discrete nuclei of other brain regions such as the hypo- Go proteins, with subsequent inhibition of adenylate cyclase thalamus, brainstem, thalamus, and limbic forebrain, thus through both CB1 and CB2 receptors (47), blockade of volt- possibly accounting for THC activity on body temperature, age-activated calcium (Ca2 ) channels of the N- and P/Q- appetite, supraspinal mechanisms of pain perception, sen- type through CB1 receptors (48), and activation of inwardly sory perception, and mood or reward. CB1 receptors are rectifying potassium channels through CB1 receptors (49), associated with nerve fibers and axon terminals, but not may not be the sole intracellular signaling messages deliv- in the neuronal soma. This pattern is consistent with the ered by psychoactive cannabinoids. There is now evidence presynaptic inhibitory effects of cannabinoids on neuro- for the coupling of CB1, but not CB2 receptors, to Gs pro- transmitter release in the brain (see ref. CB1- teins, with consequent activation of adenylyl cyclase. It is expressing cells in mouse forebrain can be divided into dis- not clear yet whether this effect may explain the biphasic tinct neuronal subpopulations. Most of the cells that highly nature of cannabinoid effects on behavior in several tests. In the hippocampus, amygdala, and entorhinal cortex THC and synthetic and endogenous cannabinoids can area, CB1 mRNA is present at low but significant levels either stimulate (50) or inhibit (51) NO formation. The in many non-GABAergic cells that can be considered as former effect results in inhibition of dopamine release from projecting principal neurons. These data are in good agree- invertebrate ganglia, whereas the inhibition of NO release ment with the observation that cannabinoids act on princi- in granule cerebellar cells seems to result from inhibition pal glutamatergic circuits as well as modulate local GABAer- of voltage-activated Ca2 channels. In any case, modulation gic inhibitory circuits by inhibiting glutamate and GABA of NO levels may result in changes in cyclic guanosine Chapter 106: Marijuana 1523 monophosphate intracellular concentrations. Finally, pro- sients in HL60 cells through these receptors. Interestingly, tein phosphorylation catalyzed by mitogen-activated pro- in this study, AEA was shown to be a very weak and partial tein kinase is coupled to both CB1- and CB2-receptor stimu- agonist at CB2 receptors. This intracellular effect, together with agonist at CB2 receptors, AEA, and much more so its meta- inhibition of the cyclic adenosine monophosphate bolically stable analogues (R)-methanandamide and 2′-flu- (cAMP)–dependent protein kinase A, is at the basis of can- oro-2-methyl-arachidonoyl-ethanolamide, act as relatively nabinoid action on the expression of several genes such as potent (Ki between 12 and 100 nM) and selective CB1- krox-24 in HL60 cells (52) or the prolactin receptor and receptor agonists, and thus can be considered useful phar- the high-affinity receptors trk for the nerve growth factor in macologic tools for studies on the bioactivity of endocan- human breast cancer cells (53). Likewise, bly in part because of the rapid metabolism of this com- CB1-induced activation of focal adhesion kinase in hippo- pound both in vitro and in vivo (59), and because AEA is campal slices, an effect suggested to lead to modulation by a partial agonist in some functional assays of CB activity 1 cannabinoids of synaptic plasticity and learning, results (60). In the brain, AEA was shown to exert inhibitory ac- from inhibition of adenylate cyclase and protein kinase A. These ef- Endogenous Ligands (Endocannabinoids) fects probably result from the capability of AEA to induce, by activation of CB1 receptors, modulation of neurotrans- Since the mid-1990s, several fatty acid derivatives have been mitter (e. This neuromodula- substances, however, can displace high-affinity cannabinoid tory action may also underlie AEA regulation of hormone ligands from selective binding sites in membrane prepara- release at the level of the hypothalamus-pituitary-adrenal tions containing the CB1 or the CB2 receptor. Anandamide axis, as well as the antinociceptive effects of the compound (arachidonoylethanolamide, AEA), the amide of arachi- through both spinal and supraspinal mechanisms (63). The other prominent endoge- lated through the regulation of either their biosynthesis or nous ligand is a glycerol ester, 2-arachidonoyl glycerol inactivation. It is commonly accepted that the AEA and 2- (2-AG) (55). These compounds share the ability to bind to AG are not stored as such in cells, but rather are synthesized and to activate CB1 and (particularly in the case of 2-AG) 2 and are directly released by cells 'on demand,' after Ca CB2 receptors. Therefore, they induce a series of pharmaco- influx into the cell (such as that occurring in neurons on logic effects in vitro and in vivo that are, to some extent, depolarization or in mast cells after IgE-mediated activa- similar to those exerted by THC. Other fatty acid deriva- tion) and the hydrolysis of phospholipid precursors (40). The molecular mode of action nolamines (NAPEs) (64). This reaction is catalyzed by a of these latter compounds is still a subject for investigation.
It suffers extensive first- pass metabolism - an intranasal administration method has recently been devised which enhances both absolute bioavailability and brain delivery (Fatouh et al order genuine plaquenil on-line quinine arthritis pain, 2017) order plaquenil no prescription rheumatoid arthritis definition nhs. This compound is not yet available in clinical practice cheap 200 mg plaquenil with amex rheumatoid arthritis diet natural remedies. SELECTIVE NORADRENERGIC REUPTAKE INHIBITOR (NARI) Reboxetine is a selective noradrenergic reuptake inhibitor (NARI). In 2010, the German Institute for Quality and Efficiency in Health Care (IQEHC) published results of a meta-analysis which found that reboxetine was not more effective than placebo. MULTIPLE/DUAL ACTION ANTIDEPRESSANTS The dual action antidepressants may be more effective antidepressant than the SSRIs; remission is achieved by venlafaxine in 45% of cases, and by SSRIs in 35% of cases (Thase et al, 2001). And, mirtazapine may have a more rapid onset than many of the newer antidepressants (Gartlehner et al, 2008). Venlafaxine (and desvenlafaxine) is described as a selective noradrenalin and serotonin reuptake inhibitor. Mirtazapine has a range of actions, central is alpha-2 antagonism which disinhibits 5HT and NA neurons causing release of these transmitters. In addition, mirtazapine blocks most 5HT receptors, which results in the release of DA. Duloxetine has a range of actions impacting on synaptic 5HT, NA and DA. AUGMENTATION OF ANTIDEPRESSANTS The response rate to antidepressants is poor. Unresponsive depression may be managed by combining antidepressants. Another strategy is augmentation of an antidepressant with a non-antidepressant. Lithium is the most extensively reported antidepressant augmenter (Bauer et al, 2010). Thyroxine has also been widely used, even in the presence of normal thyroid function (Kaira and Balhara, 2014). Atypical antipsychotics have been widely used as augmenters. However, a recent study found no clear evidence to support antipsychotic augmentation (Simons, 2017). BIPOLAR DEPRESSION Unipolar depression and the depressed phase of bipolar depression were considered to be much the same condition. Because of concern that antidepressants may trigger manic swings, they are usually only used in bipolar depression when a mood stabilizer is in place (Harel and Levkovitz, 2008). And, they are often withdrawn as soon as the depression has remitted. Lamotrigine (an anticonvulsant: sodium channel blocker and inhibitor of glutamate release) is an effective mood stabilizer - it prevents relapse into bipolar depression (but not manic swings). It has also been suggested as an acute treatment of bipolar depression (Solmi et al, 2016). Quetiapine (an atypical antipsychotic) has been approved in some countries for the treatment of bipolar depression (Avery and Drayton, 2016). If bipolar depression is not resolving, and the decision is made to avoid antidepressant medication, ECT and TMS are treatment options. PSYCHOTHERAPY Psychotherapy [cognitive behavioural therapy (CBT) and interpersonal psychotherapy (IPT)] are effective in depression. Strangely, there appears to be a reduction in the efficacy of psychotherapy, just as has been observed with medication (Johnsen and Friborg, 2015). The best outcome is obtained when the patient receives both psychotherapy and pharmacotherapy (Davey and Chanen, 2016). This observation, but no progress, has been made (McHugh 2005; Parker 2009). Davey and Chanen, (2016) argue the current antidepressants have not fulfilled the promise, but they have some value, and we must cope with what we have. Depression is associated with immune (and endocrine) system changes. A systematic review and meta-analysis explored the association between two inflammatory markers (C-reactive protein, and Interleukin-6) and depression in older people (Smith et al, 2017). The authors found a cross-sectional and longitudinal association between these markers and depression, with inflammation leading to depression (rather than the reverse). However, the addition of non-steroidal anti-inflammatory drugs to standard antidepressant treatment has yielded disappointing results (Husain et al, 2017a&b). Omega-3 polyunsaturated fatty acids (PUFAs) can modulate key pathways in inflammation, and the nervous and other systems. Some work has indicated that omega-3 fatty acids have therapeutic benefits in the treatment of depression, both as monotherapy and adjunct therapy (Rutkofsky et al, 2017). However, somewhat surprisingly, randomized placebo-controlled trials, omega-3 fatty acids did not prevent depressive symptoms during pregnancy and post-partum (Mozurkewich et al, 2013; Vas et al, 2017). Agomelatine, a melatonin receptor agonist was suggested as a unique approach to the treatment of depression. Further research indicates it has small (if any) antidepressant effects, which are due to an SSRI action. Attention has been directed to the glutamate system. Rapid remissions (within a couple of hours) have been claimed for intravenous administration of ketamine (NMDA receptor antagonist/blocker) in acute depression (Monteggia and Zarate 2015). A recent review (Swartz et al, 2017) found it premature to recommend ketamine in clinical practice – however, there was cautious optimism this drug will become an important tool in the treatment of severe mood and anxiety disorders. Extracts of Hypericum perforatum L (popularly called St. A recent meta-analysis (Ng et al, 2017) – along with a previous Cochrane Pridmore S. To this point, however, follow-up studies are lacking. Bipolar depression: managing patients with second generation antipsychotics. The clinical effect of isoniazide and iproniazide in the treatment of pulmonary tuberculosis. A randomized clinical study of Lu AA21004 in the prevention of relapse. The unfulfilled promise of the antidepressant medications. Intranasal agomelatine solid lipid nanoparticle to enhance brain delivery. Combining stimulants with monoamine oxidase inhibitors: a review of uses and one possible additional indication. A systematic review of agomelatine-induced liver injury. Comparative benefits and harms of second- generation antidepressants: background paper for the American College of Physicians.
This low rate of prerenal ARF has been observed by other workers in an intensive care setting plaquenil 200mg for sale rheumatoid arthritis memes. FIGURE 8-7 FINDINGS OF THE M ADRID STUDY Incidences of different form s of acute renal failure (ARF) in the M adrid ARF Study purchase plaquenil 200mg with visa arthritis knee needle. Figures express cases per m illion persons per year with 95% confidence intervals (CI) cheap plaquenil 200mg otc what causes arthritis in feet. Condition Incidence (per million persons per year) 95% CI Acute tubular necrosis 88 79–97 Prerenal acute renal failure 46 40–52 Acute on chronic renal failure 29 24–34 Obstructive acute renal failure 23 19–27 Glomerulonephritis (primary or secondary) 6. This algorithm could help Normal or big kidneys to determ ine the cause of the increase in Small kidneys (excluding amiloidosis and blood urea nitrogen (BUN ) or serum polycystic kidney disease creatinine (SCr) in a given patient. ARF Parenchymatous Data indicating Improvement glomerular or Yes glomerular No with specific systemic ARF or systemic treatment? Great or Vascular small vessel Yes ARF Yes No disease? Prerenal Acute ARF tubulointerstitial Data indicating nephritis Yes interstitial No disease? Tumor lysis Acute Sulfonamides Crystals or tubular Yes tubular No Amyloidosis necrosis Other deposits? Kidney biopsy has had fluctuating roles in the diagnostic work-up of ARF. After extrarenal causes of ARF are excluded, the most common Disease Patients, n cause is acute tubular necrosis (ATN). Patients with well-established clinical and laboratory features of ATN receive no benefit from renal Primary GN 12 Extracapillary 6 biopsy. By that time, most cases of ATN have Focal sclerosing 1 resolved, so other causes could be influencing the poor evolution. Secondary GN 6 Biopsy is mandatory when a potentially treatable cause is suspected, Antiglomerular basement membrane 3 such as vasculitis, systemic disease, or glomerulonephritis (GN) in Acute postinfectious 2 adults. Other parenchymatous forms of ARF can be accurately Acute tubular necrosis 4* diagnosed without a kidney biopsy. This is true of acute post-strepto- Acute tubulointerstitial nephritis 4 coccal GN and of hemolytic-uremic syndrome in children. Kidney Atheroembolic disease 2 biopsy was performed in only one of every 16 ARF cases in the Kidney myeloma 2* M adrid ARF Study. All patients with primary GN, 90% with Cortical necrosis 1 vasculitis and 50% with secondary GN were diagnosed by biopsy at Malignant hypertension 1 the time of ARF. As many as 15 patients were diagnosed as having ImmunoglobulinA GN + ATN 1 acute tubulointerstitial nephritis, but only four (27% ) were biopsied. Hemolytic-uremic syndrome 1 Only four of 337 patients with ATN (1. Predisposing Factors for Acute Renal Failure Other figure shows the Renal insult Very Obstructive m ain causes of elderly Elderly Young Prerenal ARF, dividing a Advanced age Acute tubular population diag- 11% 12% 17% necrosis nosed with ARF Proteinuria 11% 7% into the very elder- 20% ly (at least 80 Volume 21% years), elderly (65 depletion 29% to 79), and young 30% (younger than 65). M yeloma Essentially, acute tubular necrosis 56% (ATN ) is less Diuretic use 48% 39% frequent (P=0. Although the cause of ARF is diseases appear Higher probability usually m ultifactorial, one can define the with sim ilar for ARF cause of each case as the m ost likely con- frequency in the tributor to im pairm ent of renal function. FIGURE 8-11 O ne interesting approach is to distribute (D ata from Pascual the causes of ARF according to age. Som e of them act synergistically when they occur in the sam e patient. Advanced age and volum e depletion are particularly im portant. Prospective epidemiologic studies of acute renal failure (ARF) in large populations have not often been published. Study Period Study Population Incidence The first study reported by Eliahou and Investigator, Year Country (City) (Study Length) (millions) (pmp/y) colleagues was developed in Israel in the Eliahou et al. No data about ARF incidence are (Bristol and Devon) available from undeveloped countries. This has been another way of assessing the incidence of the m ost severe cases of ARF. Local situations, m ainly econom ics, have an effect on dialy- Investigator, Year Country Cases (pmp/y) sis facilities for ARF m anagem ent. In 1973 Israeli figures showed a lower rate of dialysis than other countries at the sam e tim e. At present, the need for dialysis in a given area depends Lachhein et al. At this level of health care, both countries had the sam e rate Sanchez et al. The Spanish data of the EDTA-ERA Registry in 1982 McGregor et al. FIGURE 8-15 HISTORICAL PATTERNS OF ACUTE RENAL FAILURE Historical perspective of acute renal failure (ARF) patterns in France, India, and South Africa. In the 1960s and 1970s, obstetrical Proportion of Cases, % causes were a great problem in both France and India and overall incidences of ARF were India France India South Africa similar. Surgical cases were almost negligible in France 1973 1965–1974 1981–1986 1981–1986 1986–1988 India at that time, probably because of the rel- Surgical 46 11 30 30 8 ative unavailability of hospital facilities. During Medical 30 67 70 61 77 the 1980s surgical and medical causes were Obstetric 24 22 2 9 15 similar in both countries. In India, the increase in surgical cases may be explained by advances in health care, so that more surgical procedures could be done. The decrease in surgical cases in France, despite the fact that surgery had become very sophisticated, could be explained by better management of surgical patients. In addition, obstetric cases had alm ost disappeared in spectrum m oves toward that observed in developed countries; and France in the 1980s, but they were still an im portant cause of ARF 3) great differences can be detected in ARF causes am ong develop- in India. In a South African study that excluded the white popula- ing countries, depending on their individual econom ic power. In conclusion, 1) the econom ic 25 HD HD UF 20 68% 60% 1% 15 PD Diarrhea Hemolysis 5% Obstetric CRRT CRRT PD 10 1% 31% 33% 5 EDTA (1982) Madrid study (1992) A 2221 patients B 270 patients 0 1965–1974 1975–1980 1981–1986 Years FIGURE 8-17 Evolution of dialysis techniques for acute renal failure (ARF) in Spain. FIGURE 8-16 A, The percentages of different modalities of dialysis performed in Changing trends in the causes of acute renal failure (ARF) in the Spain in the early 1980s. Trends can be identified from the analysis of At this latter time, 90% of conventional hemodialysis (HD) was per- medical and obstetric causes by the Chandigarh Study. These rates are those and colleagues showed how obstetric (septic abortion) and hemolytic of a developed country. In developing countries, dialysis should be (mainly herbicide toxicity) causes tended to decrease as economic performed according to the available facilities and each individual power and availability of hospitalization improved with time. PD— peritoneal dial- causes of ARF, however, did not completely disappear. By contrast, ysis; CRRT— continuous renal replacem ent technique; diarrheal causes of ARF, such as cholera and other gastrointestinal dis- UF— isolated ultrafiltration. In conclusion, gastrointestinal causes of ARF; B data from the M adrid ARF Study. Educational programs and changes in gynecological attention, focused on controlled medical abortion and contraceptive measures, should be promoted to eradicate other forms of ARF that constitute a plague in Third W orld countries.