{"id":849,"date":"2014-02-12T21:20:06","date_gmt":"2014-02-12T20:20:06","guid":{"rendered":"https:\/\/blogs.bmj.com\/adc\/?p=849"},"modified":"2014-02-05T21:09:33","modified_gmt":"2014-02-05T20:09:33","slug":"statsminiblog-subgroup-or-sensitivity-analyses","status":"publish","type":"post","link":"https:\/\/blogs.bmj.com\/adc\/2014\/02\/12\/statsminiblog-subgroup-or-sensitivity-analyses\/","title":{"rendered":"StatsMiniBlog: Subgroup or sensitivity analyses?"},"content":{"rendered":"<p><a href=\"https:\/\/blogs.bmj.com\/adc\/files\/2014\/02\/20140205-091454.jpg\"><img decoding=\"async\" src=\"https:\/\/blogs.bmj.com\/adc\/files\/2014\/02\/20140205-091454.jpg\" alt=\"20140205-091454.jpg\" class=\"alignnone size-full\" \/><\/a><\/p>\n<p>Perhaps becoming a little obscure, but there are some folk in the world who become concerned about undertaking analysis in systematic reviews.<\/p>\n<p>Some of these are described as &#8220;subgroup&#8221; analysis, others &#8220;sensitivity&#8221;. What&#8217;s the difference, and why?<\/p>\n<p><!--more--><\/p>\n<p>Simply put &#8211; there&#8217;s often little difference. But a practical differentiation might go along the lines of<\/p>\n<p>Subgroup analysis (or meta-regression): &#8220;How might this [intervention] have a different effect in different groups&#8221; e.g. different ages of patient, or different type of quinolone, or different diagnostic classification of disease<\/p>\n<p>Sensitivity analysis: &#8220;How might our analysis be affected by something in the assumptions we have made?&#8221; e.g. lumping high and low quality studies together, regarding outcomes at 15 and 30 days as equivalent, or using fixed vs. random effects meta-analysis<\/p>\n<p>&#8211; Archi<!--TrendMD v2.4.8--><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Perhaps becoming a little obscure, but there are some folk in the world who become concerned about undertaking analysis in systematic reviews. Some of these are described as &#8220;subgroup&#8221; analysis, others &#8220;sensitivity&#8221;. What&#8217;s the difference, and why? [&#8230;]<\/p>\n<p><a class=\"btn btn-secondary understrap-read-more-link\" href=\"https:\/\/blogs.bmj.com\/adc\/2014\/02\/12\/statsminiblog-subgroup-or-sensitivity-analyses\/\">Read More&#8230;<\/a><\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2676],"tags":[],"class_list":["post-849","post","type-post","status-publish","format-standard","hentry","category-stats"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>StatsMiniBlog: Subgroup or sensitivity analyses? - ADC Online Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blogs.bmj.com\/adc\/2014\/02\/12\/statsminiblog-subgroup-or-sensitivity-analyses\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"StatsMiniBlog: Subgroup or sensitivity analyses? - ADC Online Blog\" \/>\n<meta property=\"og:description\" content=\"Perhaps becoming a little obscure, but there are some folk in the world who become concerned about undertaking analysis in systematic reviews. Some of these are described as &#8220;subgroup&#8221; analysis, others &#8220;sensitivity&#8221;. What&#8217;s the difference, and why? [...]Read More...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/blogs.bmj.com\/adc\/2014\/02\/12\/statsminiblog-subgroup-or-sensitivity-analyses\/\" \/>\n<meta property=\"og:site_name\" content=\"ADC Online Blog\" \/>\n<meta property=\"article:published_time\" content=\"2014-02-12T20:20:06+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/blogs.bmj.com\/adc\/files\/2014\/02\/20140205-091454.jpg\" \/>\n<meta name=\"author\" content=\"Bob Phillips\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Bob Phillips\" \/>\n\t<meta name=\"twitter:label2\" content=\"Estimated reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/blogs.bmj.com\\\/adc\\\/2014\\\/02\\\/12\\\/statsminiblog-subgroup-or-sensitivity-analyses\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/blogs.bmj.com\\\/adc\\\/2014\\\/02\\\/12\\\/statsminiblog-subgroup-or-sensitivity-analyses\\\/\"},\"author\":{\"name\":\"Bob Phillips\",\"@id\":\"https:\\\/\\\/blogs.bmj.com\\\/adc\\\/#\\\/schema\\\/person\\\/9e94029681ecf36e73bbd1eb2be2ef94\"},\"headline\":\"StatsMiniBlog: Subgroup or sensitivity analyses?\",\"datePublished\":\"2014-02-12T20:20:06+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/blogs.bmj.com\\\/adc\\\/2014\\\/02\\\/12\\\/statsminiblog-subgroup-or-sensitivity-analyses\\\/\"},\"wordCount\":134,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/blogs.bmj.com\\\/adc\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/blogs.bmj.com\\\/adc\\\/2014\\\/02\\\/12\\\/statsminiblog-subgroup-or-sensitivity-analyses\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/blogs.bmj.com\\\/adc\\\/files\\\/2014\\\/02\\\/20140205-091454.jpg\",\"articleSection\":[\"stats\"],\"inLanguage\":\"en-GB\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/blogs.bmj.com\\\/adc\\\/2014\\\/02\\\/12\\\/statsminiblog-subgroup-or-sensitivity-analyses\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/blogs.bmj.com\\\/adc\\\/2014\\\/02\\\/12\\\/statsminiblog-subgroup-or-sensitivity-analyses\\\/\",\"url\":\"https:\\\/\\\/blogs.bmj.com\\\/adc\\\/2014\\\/02\\\/12\\\/statsminiblog-subgroup-or-sensitivity-analyses\\\/\",\"name\":\"StatsMiniBlog: Subgroup or sensitivity analyses? - ADC Online Blog\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/blogs.bmj.com\\\/adc\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/blogs.bmj.com\\\/adc\\\/2014\\\/02\\\/12\\\/statsminiblog-subgroup-or-sensitivity-analyses\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/blogs.bmj.com\\\/adc\\\/2014\\\/02\\\/12\\\/statsminiblog-subgroup-or-sensitivity-analyses\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/blogs.bmj.com\\\/adc\\\/files\\\/2014\\\/02\\\/20140205-091454.jpg\",\"datePublished\":\"2014-02-12T20:20:06+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/blogs.bmj.com\\\/adc\\\/2014\\\/02\\\/12\\\/statsminiblog-subgroup-or-sensitivity-analyses\\\/#breadcrumb\"},\"inLanguage\":\"en-GB\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/blogs.bmj.com\\\/adc\\\/2014\\\/02\\\/12\\\/statsminiblog-subgroup-or-sensitivity-analyses\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-GB\",\"@id\":\"https:\\\/\\\/blogs.bmj.com\\\/adc\\\/2014\\\/02\\\/12\\\/statsminiblog-subgroup-or-sensitivity-analyses\\\/#primaryimage\",\"url\":\"https:\\\/\\\/blogs.bmj.com\\\/adc\\\/files\\\/2014\\\/02\\\/20140205-091454.jpg\",\"contentUrl\":\"https:\\\/\\\/blogs.bmj.com\\\/adc\\\/files\\\/2014\\\/02\\\/20140205-091454.jpg\",\"width\":180,\"height\":76},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/blogs.bmj.com\\\/adc\\\/2014\\\/02\\\/12\\\/statsminiblog-subgroup-or-sensitivity-analyses\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/blogs.bmj.com\\\/adc\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"StatsMiniBlog: Subgroup or sensitivity analyses?\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/blogs.bmj.com\\\/adc\\\/#website\",\"url\":\"https:\\\/\\\/blogs.bmj.com\\\/adc\\\/\",\"name\":\"ADC Online Blog\",\"description\":\"Education, debate, and meandering thoughts on child health, using evidence and research.\",\"publisher\":{\"@id\":\"https:\\\/\\\/blogs.bmj.com\\\/adc\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/blogs.bmj.com\\\/adc\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-GB\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/blogs.bmj.com\\\/adc\\\/#organization\",\"name\":\"ADC Online Blog\",\"url\":\"https:\\\/\\\/blogs.bmj.com\\\/adc\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-GB\",\"@id\":\"https:\\\/\\\/blogs.bmj.com\\\/adc\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/blogs.bmj.com\\\/adc\\\/files\\\/2017\\\/10\\\/blog-logo-adc.png\",\"contentUrl\":\"https:\\\/\\\/blogs.bmj.com\\\/adc\\\/files\\\/2017\\\/10\\\/blog-logo-adc.png\",\"width\":285,\"height\":34,\"caption\":\"ADC Online Blog\"},\"image\":{\"@id\":\"https:\\\/\\\/blogs.bmj.com\\\/adc\\\/#\\\/schema\\\/logo\\\/image\\\/\"}},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/blogs.bmj.com\\\/adc\\\/#\\\/schema\\\/person\\\/9e94029681ecf36e73bbd1eb2be2ef94\",\"name\":\"Bob Phillips\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-GB\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/9ce6165c429dd8d36e6532db799ebe58e6f9c614c44e05e60d553e4bac662441?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/9ce6165c429dd8d36e6532db799ebe58e6f9c614c44e05e60d553e4bac662441?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/9ce6165c429dd8d36e6532db799ebe58e6f9c614c44e05e60d553e4bac662441?s=96&d=mm&r=g\",\"caption\":\"Bob Phillips\"},\"url\":\"https:\\\/\\\/blogs.bmj.com\\\/adc\\\/author\\\/bphillips\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"StatsMiniBlog: Subgroup or sensitivity analyses? - ADC Online Blog","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/blogs.bmj.com\/adc\/2014\/02\/12\/statsminiblog-subgroup-or-sensitivity-analyses\/","og_locale":"en_GB","og_type":"article","og_title":"StatsMiniBlog: Subgroup or sensitivity analyses? - ADC Online Blog","og_description":"Perhaps becoming a little obscure, but there are some folk in the world who become concerned about undertaking analysis in systematic reviews. Some of these are described as &#8220;subgroup&#8221; analysis, others &#8220;sensitivity&#8221;. What&#8217;s the difference, and why? [...]Read More...","og_url":"https:\/\/blogs.bmj.com\/adc\/2014\/02\/12\/statsminiblog-subgroup-or-sensitivity-analyses\/","og_site_name":"ADC Online Blog","article_published_time":"2014-02-12T20:20:06+00:00","og_image":[{"url":"https:\/\/blogs.bmj.com\/adc\/files\/2014\/02\/20140205-091454.jpg","type":"","width":"","height":""}],"author":"Bob Phillips","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Bob Phillips","Estimated reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/blogs.bmj.com\/adc\/2014\/02\/12\/statsminiblog-subgroup-or-sensitivity-analyses\/#article","isPartOf":{"@id":"https:\/\/blogs.bmj.com\/adc\/2014\/02\/12\/statsminiblog-subgroup-or-sensitivity-analyses\/"},"author":{"name":"Bob Phillips","@id":"https:\/\/blogs.bmj.com\/adc\/#\/schema\/person\/9e94029681ecf36e73bbd1eb2be2ef94"},"headline":"StatsMiniBlog: Subgroup or sensitivity analyses?","datePublished":"2014-02-12T20:20:06+00:00","mainEntityOfPage":{"@id":"https:\/\/blogs.bmj.com\/adc\/2014\/02\/12\/statsminiblog-subgroup-or-sensitivity-analyses\/"},"wordCount":134,"commentCount":0,"publisher":{"@id":"https:\/\/blogs.bmj.com\/adc\/#organization"},"image":{"@id":"https:\/\/blogs.bmj.com\/adc\/2014\/02\/12\/statsminiblog-subgroup-or-sensitivity-analyses\/#primaryimage"},"thumbnailUrl":"https:\/\/blogs.bmj.com\/adc\/files\/2014\/02\/20140205-091454.jpg","articleSection":["stats"],"inLanguage":"en-GB","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/blogs.bmj.com\/adc\/2014\/02\/12\/statsminiblog-subgroup-or-sensitivity-analyses\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/blogs.bmj.com\/adc\/2014\/02\/12\/statsminiblog-subgroup-or-sensitivity-analyses\/","url":"https:\/\/blogs.bmj.com\/adc\/2014\/02\/12\/statsminiblog-subgroup-or-sensitivity-analyses\/","name":"StatsMiniBlog: Subgroup or sensitivity analyses? - ADC Online Blog","isPartOf":{"@id":"https:\/\/blogs.bmj.com\/adc\/#website"},"primaryImageOfPage":{"@id":"https:\/\/blogs.bmj.com\/adc\/2014\/02\/12\/statsminiblog-subgroup-or-sensitivity-analyses\/#primaryimage"},"image":{"@id":"https:\/\/blogs.bmj.com\/adc\/2014\/02\/12\/statsminiblog-subgroup-or-sensitivity-analyses\/#primaryimage"},"thumbnailUrl":"https:\/\/blogs.bmj.com\/adc\/files\/2014\/02\/20140205-091454.jpg","datePublished":"2014-02-12T20:20:06+00:00","breadcrumb":{"@id":"https:\/\/blogs.bmj.com\/adc\/2014\/02\/12\/statsminiblog-subgroup-or-sensitivity-analyses\/#breadcrumb"},"inLanguage":"en-GB","potentialAction":[{"@type":"ReadAction","target":["https:\/\/blogs.bmj.com\/adc\/2014\/02\/12\/statsminiblog-subgroup-or-sensitivity-analyses\/"]}]},{"@type":"ImageObject","inLanguage":"en-GB","@id":"https:\/\/blogs.bmj.com\/adc\/2014\/02\/12\/statsminiblog-subgroup-or-sensitivity-analyses\/#primaryimage","url":"https:\/\/blogs.bmj.com\/adc\/files\/2014\/02\/20140205-091454.jpg","contentUrl":"https:\/\/blogs.bmj.com\/adc\/files\/2014\/02\/20140205-091454.jpg","width":180,"height":76},{"@type":"BreadcrumbList","@id":"https:\/\/blogs.bmj.com\/adc\/2014\/02\/12\/statsminiblog-subgroup-or-sensitivity-analyses\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/blogs.bmj.com\/adc\/"},{"@type":"ListItem","position":2,"name":"StatsMiniBlog: Subgroup or sensitivity analyses?"}]},{"@type":"WebSite","@id":"https:\/\/blogs.bmj.com\/adc\/#website","url":"https:\/\/blogs.bmj.com\/adc\/","name":"ADC Online Blog","description":"Education, debate, and meandering thoughts on child health, using evidence and research.","publisher":{"@id":"https:\/\/blogs.bmj.com\/adc\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/blogs.bmj.com\/adc\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-GB"},{"@type":"Organization","@id":"https:\/\/blogs.bmj.com\/adc\/#organization","name":"ADC Online Blog","url":"https:\/\/blogs.bmj.com\/adc\/","logo":{"@type":"ImageObject","inLanguage":"en-GB","@id":"https:\/\/blogs.bmj.com\/adc\/#\/schema\/logo\/image\/","url":"https:\/\/blogs.bmj.com\/adc\/files\/2017\/10\/blog-logo-adc.png","contentUrl":"https:\/\/blogs.bmj.com\/adc\/files\/2017\/10\/blog-logo-adc.png","width":285,"height":34,"caption":"ADC Online Blog"},"image":{"@id":"https:\/\/blogs.bmj.com\/adc\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/blogs.bmj.com\/adc\/#\/schema\/person\/9e94029681ecf36e73bbd1eb2be2ef94","name":"Bob Phillips","image":{"@type":"ImageObject","inLanguage":"en-GB","@id":"https:\/\/secure.gravatar.com\/avatar\/9ce6165c429dd8d36e6532db799ebe58e6f9c614c44e05e60d553e4bac662441?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/9ce6165c429dd8d36e6532db799ebe58e6f9c614c44e05e60d553e4bac662441?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/9ce6165c429dd8d36e6532db799ebe58e6f9c614c44e05e60d553e4bac662441?s=96&d=mm&r=g","caption":"Bob Phillips"},"url":"https:\/\/blogs.bmj.com\/adc\/author\/bphillips\/"}]}},"_links":{"self":[{"href":"https:\/\/blogs.bmj.com\/adc\/wp-json\/wp\/v2\/posts\/849","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.bmj.com\/adc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blogs.bmj.com\/adc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.bmj.com\/adc\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.bmj.com\/adc\/wp-json\/wp\/v2\/comments?post=849"}],"version-history":[{"count":0,"href":"https:\/\/blogs.bmj.com\/adc\/wp-json\/wp\/v2\/posts\/849\/revisions"}],"wp:attachment":[{"href":"https:\/\/blogs.bmj.com\/adc\/wp-json\/wp\/v2\/media?parent=849"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.bmj.com\/adc\/wp-json\/wp\/v2\/categories?post=849"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.bmj.com\/adc\/wp-json\/wp\/v2\/tags?post=849"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}