A case-control study

old testament bible character study
September 27, 2019
The mean body mass index (BMI)
September 27, 2019

Question

1.     A case-control study is conducted to assess the relationship between heavy alcohol use during the

first trimester of pregnancy and miscarriage. Fifty women who suffered miscarriage are enrolled along with 50 who delivered full term. Each participant’s use of alcohol during pregnancy is ascertained. Heavy drinking is defined as 4 or more drinks on one occasion. The data are shown below.

Miscarriage Full Term

Heavy Alcohol consumption 14 4

Non heavy alcohol 36 46

Compute the odds of miscarriage in women with heavy alcohol use in pregnancy.

Odds Heavy Use = __14/36=38%______

Compute the odds of miscarriage in women with no heavy alcohol use in pregnancy.

Odds No Heavy Use __36/46=78%___

Compute is the odds ratio for miscarriage as a function of heavy alcohol use.

Odds Ratio = __.38/.46=.82_____

Did I work this right? I have two examples in the book but one is showing relationship between hypertension and prevalent cardio disease and another one using the invariance property of the odds ratio. I saw the same problem in this forum, but unsure if it is correct. Stats not my forte. ty

 
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