{"id":33657,"date":"2015-03-17T11:48:40","date_gmt":"2015-03-17T10:48:40","guid":{"rendered":"https:\/\/blogs.bmj.com\/bmj\/?p=33657"},"modified":"2015-03-17T11:48:40","modified_gmt":"2015-03-17T10:48:40","slug":"the-bmj-today-prescribing-on-sparse-evidence-homeopathy-and-research-methodology","status":"publish","type":"post","link":"https:\/\/blogs.bmj.com\/bmj\/2015\/03\/17\/the-bmj-today-prescribing-on-sparse-evidence-homeopathy-and-research-methodology\/","title":{"rendered":"The BMJ Today: Prescribing on sparse evidence, homeopathy, and research methodology"},"content":{"rendered":"<p><strong>How to prescribe when the evidence is lacking<\/strong><br \/>\n\u2022 <a href=\"https:\/\/blogs.bmj.com\/bmj\/files\/2015\/03\/Loperamide.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft  wp-image-33659\" src=\"https:\/\/blogs.bmj.com\/bmj\/files\/2015\/03\/Loperamide-300x194.jpg\" alt=\"Loperamide\" width=\"181\" height=\"117\" srcset=\"https:\/\/blogs.bmj.com\/bmj\/files\/2015\/03\/Loperamide-300x194.jpg 300w, https:\/\/blogs.bmj.com\/bmj\/files\/2015\/03\/Loperamide.jpg 540w\" sizes=\"auto, (max-width: 181px) 100vw, 181px\" \/><\/a>Several observational studies have shown associations between using drugs with anticholinergic side effects\u2014such as loperamide, loratadine, baclofen, amitriptyline, oxybutynin, or chlorphenamine\u2014and cognitive decline. Links have also been shown with earlier death, falls, and admission to hospital with confusion and dementia. \u201cBut is this cause, or is it effect,\u201d asks Margaret McCartney. <a href=\"http:\/\/www.bmj.com\/content\/350\/bmj.h1428\">Read her discussion of the little evidence that there is and what doctors should do, in this week\u2019s No Holds Barred column<\/a>.<!--more--><\/p>\n<p><a href=\"https:\/\/blogs.bmj.com\/bmj\/files\/2015\/03\/drug-formulary.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignright  wp-image-33661\" src=\"https:\/\/blogs.bmj.com\/bmj\/files\/2015\/03\/drug-formulary-300x194.jpg\" alt=\"drug-formulary\" width=\"141\" height=\"91\" srcset=\"https:\/\/blogs.bmj.com\/bmj\/files\/2015\/03\/drug-formulary-300x194.jpg 300w, https:\/\/blogs.bmj.com\/bmj\/files\/2015\/03\/drug-formulary.jpg 540w\" sizes=\"auto, (max-width: 141px) 100vw, 141px\" \/><\/a>\u2022 How should doctors decide on drug doses for obese people, when doses recommended based on trials are meant for people of ideal weight? <a href=\"http:\/\/www.bmj.com\/content\/350\/bmj.h1356\">Stephen Head writes about the uncertainty and guesswork involved, covering the most common conditions and drug classes<\/a>. \u201cA huge research agenda in pharmacobariatrics would lead to better clinical practice and would benefit obese patients, the health economy, and wider society,\u201d he argues, calling for a drug formulary for obese people.<\/p>\n<p><strong>Research methods and reporting<\/strong><br \/>\n\u2022 The Cochrane Collaboration initially developed the Grading of Recommendations, Assessment, Development, and Evaluation (GRADE) approach to assess the quality of evidence that addresses treatment questions. However, GRADE can also be used for the assessment of evidence about prognosis. <a href=\"http:\/\/www.bmj.com\/content\/350\/bmj.h870\">Iorio et al explain just how to do this in a piece that is meant primarily for authors of systematic reviews of prognostic studies<\/a>, but which is also helpful for doctors and patients who want to better understand the likely course of any patient\u2019s disease.<\/p>\n<p><a href=\"https:\/\/blogs.bmj.com\/bmj\/files\/2015\/03\/ebola_burial_liberia.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignright size-medium wp-image-33660\" src=\"https:\/\/blogs.bmj.com\/bmj\/files\/2015\/03\/ebola_burial_liberia-300x199.jpg\" alt=\"ebola_burial_liberia\" width=\"300\" height=\"199\" srcset=\"https:\/\/blogs.bmj.com\/bmj\/files\/2015\/03\/ebola_burial_liberia-300x199.jpg 300w, https:\/\/blogs.bmj.com\/bmj\/files\/2015\/03\/ebola_burial_liberia.jpg 512w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a>\u2022 Another <a href=\"http:\/\/www.bmj.com\/content\/350\/bmj.h1115\">research methods and reporting article explains the ins and outs of estimating case fatality in emerging epidemics from population level data<\/a>. Using the recent epidemic of Ebola in west Africa as a case study, Atkins et al explain the importance of accounting for the time lag between reporting of cases and deaths, as well as country specific differences in under-reporting. Estimates from individual patients may be best, but can also be inaccurate in some cases.<\/p>\n<p><strong>No support for homeopathy, for any disease<\/strong><br \/>\n\u2022 <a href=\"http:\/\/www.bmj.com\/content\/350\/bmj.h1478\">Australia\u2019s highest medical research body recruited an independent contractor to assess the totality of evidence on homeopathy<\/a>. Over 1800 papers were reviewed, from systematic reviews and guidelines to information from homeopathy advocacy groups. Based on 225 studies that compared outcomes in people receiving homeopathy with those receiving a control intervention, \u201cthe review found no good quality, well designed studies with enough participants to support the idea that homeopathy works better than a placebo, or causes health improvements equal to those of another treatment.\u201d This chimes with the UK House of Commons Science and Technology Committee\u2019s report from 2010, which advised the government not to endorse homeopathy within the NHS.<\/p>\n<p><strong>Test yourself: heterogeneity in meta-analyses<\/strong><br \/>\n\u2022 <a href=\"http:\/\/www.bmj.com\/content\/350\/bmj.h1435\">See how much you know about heterogeneity in meta-analyses\u00a0with\u00a0a new endgames quiz<\/a>. Using as an example a systematic review <em>The BMJ<\/em> published on preventing falls and injuries among older people, Philip Sedgwick covers Cochran\u2019s Q test, Higgins\u2019s I<sup>2<\/sup>\u00a0test, subgroup analyses, and the impact of heterogeneity on interpreting the study findings.<\/p>\n<p><em><strong>Kristina Fi\u0161ter<\/strong>\u00a0is an associate editor for\u00a0<\/em>The BMJ<em>.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>How to prescribe when the evidence is lacking \u2022 Several observational studies have shown associations between using drugs with anticholinergic side effects\u2014such as loperamide, loratadine, baclofen, amitriptyline, oxybutynin, or chlorphenamine\u2014and [&#8230;]<\/p>\n<p><a class=\"btn btn-secondary understrap-read-more-link\" href=\"https:\/\/blogs.bmj.com\/bmj\/2015\/03\/17\/the-bmj-today-prescribing-on-sparse-evidence-homeopathy-and-research-methodology\/\">More&#8230;<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5750],"tags":[],"class_list":["post-33657","post","type-post","status-publish","format-standard","hentry","category-the-bmj-today"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - 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