{"version":"1.0","provider_name":"ADC Online Blog","provider_url":"https:\/\/blogs.bmj.com\/adc","author_name":"Bob Phillips","author_url":"https:\/\/blogs.bmj.com\/adc\/author\/bphillips\/","title":"Confounded - ADC Online Blog","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"qQvcIdySwW\"><a href=\"https:\/\/blogs.bmj.com\/adc\/2018\/08\/28\/confounded\/\">Confounded<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/blogs.bmj.com\/adc\/2018\/08\/28\/confounded\/embed\/#?secret=qQvcIdySwW\" width=\"600\" height=\"338\" title=\"&#8220;Confounded&#8221; &#8212; ADC Online Blog\" data-secret=\"qQvcIdySwW\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script type=\"text\/javascript\">\n\/* <![CDATA[ *\/\n\/*! This file is auto-generated *\/\n!function(d,l){\"use strict\";l.querySelector&&d.addEventListener&&\"undefined\"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!\/[^a-zA-Z0-9]\/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret=\"'+t.secret+'\"]'),o=l.querySelectorAll('blockquote[data-secret=\"'+t.secret+'\"]'),c=new RegExp(\"^https?:$\",\"i\"),i=0;i<o.length;i++)o[i].style.display=\"none\";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute(\"style\"),\"height\"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):\"link\"===t.message&&(r=new URL(s.getAttribute(\"src\")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener(\"message\",d.wp.receiveEmbedMessage,!1),l.addEventListener(\"DOMContentLoaded\",function(){for(var e,t,s=l.querySelectorAll(\"iframe.wp-embedded-content\"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute(\"data-secret\"))||(t=Math.random().toString(36).substring(2,12),e.src+=\"#?secret=\"+t,e.setAttribute(\"data-secret\",t)),e.contentWindow.postMessage({message:\"ready\",secret:t},\"*\")},!1)))}(window,document);\n\/\/# sourceURL=https:\/\/blogs.bmj.com\/adc\/wp-includes\/js\/wp-embed.min.js\n\/* ]]> *\/\n<\/script>\n","thumbnail_url":"https:\/\/blogs.bmj.com\/adc\/files\/2018\/08\/rainbow-dash-confused.gif","thumbnail_width":81,"thumbnail_height":150,"description":"There\u2019s a lot of confusion on confounding. We need to understand confounding when we try to use non-randomised studies to see if doing a Thing is going to produce more good than harm, or looking for risk factors we then will hope to influence to produce goodness. If we look at observational data on time-to-diagnosis [...]Read More..."}