Table 4.

Italian subset analysis: interaction ORs for oral contraceptive use

Oral contraceptive usenOR (95% CI)
Never2801.0 (Reference)
Ever use5661.4 (0.9-2.0)
Age at start pill (y)
12-17441.0 (0.4-2.4)
18-201822.0 (1.2-3.3)
21-241311.4 (0.8-2.4)
25+2091.0 (0.6-1.7)
Test for global null hypothesisP = 0.04
Test for trendP = 0.02
  • Adjusted for age at diagnosis, education, parity, age at first live birth, and breastfeeding.