A clinical trial for a new fertility treatment was provided to 250 women for a 10 year study perio~Investigators were interested in noting when women became pregnant for the first time (subsequent pregnancies were not an outcome of interest, only first pregnancies). Every 2 years, they came in for a follow-up visit and were asked if they were pregnant (outcome). Project coordinators also took note at these visits if any of the women had been loss-to-followup. Of the 250 women at the beginning of the study, 97 became pregnant by the first visit. During visits 2 and 3, an additional 23 women became pregnant by each visit. Another 15 women became pregnant by the 4th visit, and a final 13 women became pregnant by the last visit. There were also 2 women lost to follow-up at visit 1, 3 women LTFU in visit 2, 4 women LTFU in visit 3, and 16 women LTFU in visit 4. How many person-years are there in this study data? a. 1302 b. 1212 c. 1382 d. 1458 A new blood test has been developed to identify if children have asthm~Of the 518 children that were tested in a pediatric practice, 44 had asthma, but only 36 tested positive for it. Of the 474 children who did not have asthma, 18 had a mistakenly positive test result. What is the negative predictive value of the test? Select one: a. 0.67 b. 0.82 c. 0.98 d. 0.96 The average rate of annual maternal-infant deaths in the region was 137 per 10,000 and was expected to remain steady every year. These figures were adjusted based on new agedistribution of the population following an explosive birth rat~After the adjustment was put into place, the number of maternal-infant deaths were observed to drop to 97. What is the SMR due to the new initiative that was put into place? Select one: a. 1.41 b. 0.82 c. 0.29 d. 0.71