Question

A cohort study involving Swedish females born between 1982 and 2009 obtained data on mothers’ education and whether their daughters had an eating disorder. Among the mothers with postsecondary education 22 of their daughters suffered eating disorder while 21 of the daughters of mothers with secondary education had eating disorder. Daughters of mothers with postsecondary education accumulated a total of 43,358 person-years while those of mothers with secondary education accumulated 80,468 person-years.

Calculate the rate ratio for eating disorder and 95% confidence interval for postsecondary compared with secondary (reference) maternal education, and interpret your findings. (5 points)

Mother's education	Number of people affected by eating disorder	Person-Years at risk
Secondary	21	80468
Postsecondary	22	43358

Answer 1

From the given information we find the 95% confidence interval for secondary and postsecondary educated mother given below.