Pelvic girdle pain and sick leave The contingency table shows results from a Norwegian study about whether there was an association between pelvic girdle pain (PGP)

and sick leave during pregnancy (Malmqvist et al., 2015).

a. The study was retrospective. Explain what this means in the context of this study.

b. Explain what is meant by cases and controls in the headings of the table.

c. What proportion had been on sick leave, of those in the study who (i) had PGP and (ii) did not have PGP?

Transcribed Image Text:

PGP and Sick Leave Sick Leave Cases Controls Yes No Total 193 236 28 111 221 347