Use the following_passage to answer the next 3 Questions. The PTAM-S is a new screening tool designed to diagnose postpartum depression, or depressive disorders in persons who have given birth in the previous year before taking the screening test. The respondents are asked to self-report the severity and frequency of 10 common depression symptoms over the last three weeks. Total scores range from 0-45, with higher scores indicating a greater severity and frequency of depressive symptoms. In a study of 1,650 adults who had given birth in the previous year, a cut-off of >22 has a sensitivity of 81.5% and a false positive rate of 8.7% when compared with a psychiatrist diagnosis (the \"gold" standard). The true prevalence of postpartum depression in this study population is 38%. Question 21 1 pts What proportion of those who truly do not have endometriosis in this population screened negative by the saliva test? Answer as a percent and round to one decimal place. Question 22 1 pts What is the negative predictive value (N PV) of the saliva screening test in this study? Answer as a percent and round to one decimal place. Question 23 1 pts If you used the saliva screening test in a population with a higher prevalence of endometriosis, which of the following statements is true? 0 Both positive and negative predictive value would decrease 0 Positive predictive value would increase, while negative predictive value would decrease 0 Both positive and negative predictive value would increase