Table 1

ORs for different risk factors in a population-based case-control study of breast cancer in Germany, 1992–1995

Cases (n = 422)%Controls (n = 887)%ORa (95% CI)
 Parity
 0 full-term pregnancies7618.017119.31.0
 1–2 full-term pregnancies30171.357765.11.28 (0.87–1.89)
 3+ full-term pregnancies4510.613915.70.92 (0.54–1.57)
Total time of breastfeeding
 0 months11132.120328.41.0
 1–6 months16246.830542.60.97 (0.71–1.33)
 7+ months7321.120829.10.72 (0.49–1.07)
Menopausal status
 Premenopausal32677.372081.21.0
 Postmenopausal266.1505.61.07 (0.63–1.83)
 Unknown7016.611713.21.34 (0.94–1.91)
First degree family history
 No35985.183594.11.0
 Yes6314.9525.92.74 (1.84–4.08)
Educationb
 Low5212.311212.61.0
 Medium28868.257464.71.22 (0.83–1.79)
 High8219.420122.71.07 (0.63–1.83)
Average daily alcohol intake
 0 grams8620.414816.71.0
 1–18 grams27765.665674.00.75 (0.54–1.03)
 19+ grams5914.0839.41.24 (0.78–1.96)
Smoking
 Never active/passive399.211312.71.0
 Passive smoking only13532.025228.41.48 (0.96–2.23)
 Ex-smoking10524.925328.51.07 (0.69–1.67)
 Current smoking14333.926529.91.41 (0.91–2.18)
 Missing40.5
NAT2 status
 Rapid acetylators17942.435540.01.0
 Slow acetylators24357.653260.00.93 (0.73–1.19)
  • a ORs are adjusted for all variables in the model.

  • b Classified according to type of schooling attained and the subsequently obtained professional degree.