A gynaecology resident intends to determine the association between pre-pregnancy weight and the risk of preeclampsia. The investigator recruited 50 women diagnosed with preeclampsia as cases and 50 women without preeclampsia as controls in a tertiary care hospital. Both cases and controls were interviewed and asked about their pre-pregnancy weight and height. The pre-pregnancy body mass index (BMI) was calculated for all. Among the cases, 15 women with preeclampsia and 5 women without preeclampsia had BMI > 25 kg/m2. Calculate the odds ratio for the association between preeclampsia and BMI.
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Answer:
3.8
Explanation:
15 x 45 divided by 5 x35 equals 3.8
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