Figure 2From: The diagnostic accuracy of the Patient Health Questionnaire-2 (PHQ-2), Patient Health Questionnaire-8 (PHQ-8), and Patient Health Questionnaire-9 (PHQ-9) for detecting major depression: protocol for a systematic review and individual patient data meta-analyses Example of a nomogram depicting post-test probability of major depression as a function of the screening test result for different prevalences and assuming 80% sensitivity and 80% specificity. Back to article page