Trevathan et al conducted a case-control study of cigarette smoking and biopsy confirmed carcinoma in situ of the uterine cervix among black women ages 17 to 55 in Atlanta, Georgia in 1980 (JAMA 1983; 250(4):499-502). Cases were women who attended the Dysplasia Clinic and controls were women who attended the Family Planning Clinic; both clinics are located in Grady Memorial Hospital. The following table was adapted from the published report. Distribution of Selected Characteristics of Cases and Controls SocioeconomicCarcinoma controls status in situ low 83 222 medium 10 20 high Age at 1st Intercourse 6 46 14 or 18 49 younger 15-16 47 130 17-19 30 95 20+ 14 No. of Sexual Partners 1-4 42 175 5-9 37 81 10+ 20 32 Recall the chart from the previous problem set below. It shows the follow-up experience of a cohort followed from time zero for ten years. Note that the first ten persons in the chart are exposed and the second ten persons in the chart are unexposed. Assume that all events occur at the end of a year. For example, person 1 was lost to follow-up at the end of year 9, so this individual accumulated 9 person-years of follow-up. Year of Follow-up 01 03 04 05 05 07 08 09 10 Person 1 Person 2 Person 3 Person 4 Person 5 Person 6 Person 7 Person 8 Person 9 Person 10 Person 11 Person 12 Person 13 Person 14 Person 15 Person 16 Person 17 Person 18 Person 19 Person 20 lost to follow-up follow-up time new disease occurrence diseased time death Calculate the incidence density ratio. Round your answer to the nearest hundredth.