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A cross-sectional study assessed the accuracy of asking patients two questions as a screening test for depression in GP clinics. The 1st question focused on depressed mood and the 2nd focused on their pleasure or interest in doing things. In total, 670 patients attending a GP clinic were invited to participate, and 421 agreed. Patients were asked the two questions at any time during their consultation, and if the response to either question was yes, screening was considered positive (that is, at high risk of depression); otherwise screening was considered negative (that is, at low risk of depression). A psychiatric interview was used to diagnose clinical depression. Overall, 29 of the 421 patients were diagnosed as having clinical depression, 392 patients were found not to have a diagnosis of depression, of whom 263 (67.1%) were correctly identified with a negative result on the screening test. Of the 157 patients identified as positive on the screening test, 28 (17.8%) were correctly identified because they were subsequently diagnosed as having depression. 1. Create a 2x2 table (show working) 2. What was the positive predictive value of the screening test? (show working) 3. Was the test specific? (show working) Describe in words?