{"id":1143,"date":"2015-08-21T21:22:52","date_gmt":"2015-08-21T20:22:52","guid":{"rendered":"https:\/\/blogs.bmj.com\/adc\/?p=1143"},"modified":"2015-07-23T23:44:30","modified_gmt":"2015-07-23T22:44:30","slug":"basics-avid","status":"publish","type":"post","link":"https:\/\/blogs.bmj.com\/adc\/2015\/08\/21\/basics-avid\/","title":{"rendered":"Basics: AVID"},"content":{"rendered":"

\"060314_1404_Whenatestis1.jpg\"<\/a> The shortcut world of acronyms for critical appraisal was lacking one for diagnostic test accuracy – we have RAMbo for RCTs<\/a>, FAST for systematic reviews<\/a>, but what of the poor reader of studies evaluating a new test?<\/p>\n

We know the basic idea – patients who are considered to potentially have the diagnosis in question<\/a> have both the test-under-evaluation and the as-good-as-we, these are assessed without looking \u00a0at the results from the other one, and that if there are cut-offs these are reproducible<\/a>.<\/p>\n

Wait! That’s it …<\/p>\n

We need an\u00a0A<\/strong>ppropriate population – not a mix of barn door and definitely not<\/p>\n

It needs to avoid\u00a0V<\/strong>erification biases – make sure that everyone got both tests, not just those in whom the ‘new’ test was positive, for example<\/p>\n

The tests need to be I<\/strong>ndependent of each other<\/p>\n

And don’t believe a single study – with diagnostics we need to see D<\/strong>uplication of results<\/p>\n

There we go … AVID<\/p>\n

– Archi<\/p>\n","protected":false},"excerpt":{"rendered":"

The shortcut world of acronyms for critical appraisal was lacking one for diagnostic test accuracy – we have RAMbo for RCTs, FAST for systematic reviews, but what of the poor reader of studies evaluating a new test? We know the basic idea – patients who are considered to potentially have the diagnosis in question have […]<\/p>\n

Read More…<\/a><\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[79,81],"tags":[],"class_list":["post-1143","post","type-post","status-publish","format-standard","hentry","category-archimedes","category-diagnostics"],"yoast_head":"\nBasics: AVID - 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\/2015\/08\/21\/basics-avid\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Basics: AVID - ADC Online Blog\" \/>\n<meta property=\"og:description\" content=\"The shortcut world of acronyms for critical appraisal was lacking one for diagnostic test accuracy – we have RAMbo for RCTs, FAST for systematic reviews, but what of the poor reader of studies evaluating a new test? 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