{"id":8198,"date":"2019-05-22T16:05:06","date_gmt":"2019-05-22T16:05:06","guid":{"rendered":"http:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/indices_of_efficacy\/"},"modified":"2019-05-22T16:05:06","modified_gmt":"2019-05-22T16:05:06","slug":"indices_of_efficacy","status":"publish","type":"post","link":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/indices_of_efficacy\/","title":{"rendered":"Indices of efficacy"},"content":{"rendered":"<p>N<\/p><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/p>\n<ul>\n<li class=\"\" style=\"text-align: left;\">Sensitivity = a\/n1 = true positives\/(true positives + false positives)<\/li>\n<li class=\"\" style=\"text-align: left;\">Specificity = d\/n2 = true negatives\/(true negatives + false positives)<\/li>\n<li class=\"\" style=\"text-align: left;\">Positive predictive value = a\/m1 = true positives\/(true positives + false positives)<\/li>\n<li class=\"\" style=\"text-align: left;\">Negative&nbsp;predictive value = d\/m2 =&nbsp;true negatives\/(true negatives + false&nbsp;negatives)<\/li>\n<li class=\"\" style=\"text-align: left;\">Accuracy = (a+d)\/N = (true positives +&nbsp;true negatives\/all individuals<\/li>\n<\/ul>\n<\/p>\n<\/p>\n<p class=\"\" style=\"text-align: center;\">Calculating the five main indices of efficacy<\/p>\n<p class=\"\" style=\"text-align: center;\"><\/p>\n<p>See <a href=\"attributable_fraction\">Attributable fraction<\/a>, <a href=\"efficacy\">Efficacy<\/a>, <a href=\"false_negative\">False negative<\/a>, <a href=\"false_positive\">False positive<\/a>, Likelihood ration (LR), <a href=\"precision\">Precision<\/a>, <a href=\"sensitivity_-epidemiology-\">Sensitivity (epidemiology)<\/a>, <a href=\"specificity_-epidemiology-\">Specificity (epidemiology)<\/a><\/p>\n<p><\/p>\n<p><\/body><\/html><\/p>\n","protected":false},"excerpt":{"rendered":"<p>N Sensitivity = a\/n1 = true positives\/(true positives + false positives) Specificity = d\/n2 = true negatives\/(true negatives + false positives) Positive predictive value = a\/m1 = true positives\/(true positives + false positives) Negative&nbsp;predictive value = d\/m2 =&nbsp;true negatives\/(true negatives + false&nbsp;negatives) Accuracy = (a+d)\/N = (true positives +&nbsp;true negatives\/all individuals Calculating the five main &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/indices_of_efficacy\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Indices of efficacy&#8221;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[2],"class_list":["post-8198","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-glossary","entry"],"_links":{"self":[{"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/posts\/8198","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/comments?post=8198"}],"version-history":[{"count":0,"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/posts\/8198\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/media?parent=8198"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/categories?post=8198"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/tags?post=8198"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}