Table 3

Association of breast cancer risk with urinary ratios of 6β-OHC: cortisol, Shanghai Breast Cancer Study, 1996–98

Cortisol ratios (by quartiles)No. of CasesNo. of ControlsAdjusted ORa95% CI
All Women
 ≤1.3239621.0
 1.33–2.1651601.60.9 –3.1
 2.17–3.2863622.21.1 –4.2
 ≥3.2893623.71.9 –7.4
 Trend testP < 0.001
Women ≤45 years
 ≤1.3216211.0
 1.33–2.1626241.50.6 –3.9
 2.17–3.2821261.10.4 –3.0
 ≥3.2839312.20.8 –6.1
 Trend testP = 0.25
Women >45 years
 ≤1.3223411.0
 1.33–2.1625361.40.6 –3.5
 2.17–3.2842363.11.2 –7.7
 ≥3.2854316.02.2 –16.1
 Trend testP < 0.001
  • a Adjusted for education level, waist-to-hip ratio, body mass index, age at menarche, age at menopause, and age at first live birth.