Question

In a study of upper respiratory tract infections (URTI) in 551 infants, 445 were exclusively bottle-fed and 106 were exclusively breast-fed. Of the babies that had a URTI in the first four months of life, 207 were bottle-fed and 34 were breast-fed. Babies who were mix-fed (breast and bottle) were excluded from the study

Construct a 2x2 table using the data provided above.        (4 marks)

5b Calculate the odds ratio of having one or more episodes of URTI in bottle-fed compared to breast-fed infants. (3 marks)

5c Interpret the odds ratio calculated in 3b above.    (2 marks)

Construct a 2x2 table using the data provided above.        (4 marks)

5b Calculate the odds ratio of having one or more episodes of URTI in bottle-fed compared to breast-fed infants. (3 marks)

5c Interpret the odds ratio calculated in 3b above.    (2 marks)

Answer 1