Table 1.

Characteristics of female colorectal adenoma cases, colonoscopy controls, and population controls; Minnesota Cancer Prevention Research Unit Case-Control Study, 1991-1994

CharacteristicCases (n = 209), mean (SE)*Colonoscopy controls (n = 408), mean (SE)Population controls (n = 238), mean (SE)
Age categories (y), %
    30-395.313.79.7
    40-4915.324.314.7
    50-5930.631.130.7
    60+48.830.945.0
Smoking status, %
    Current smoker22.015.717.7
    Ex-smoker34.930.626.1
    Never smoker43.153.756.3
Drinking status, %
    Current drinker70.871.071.4
    Ex-drinker22.018.214.7
    Not drinker7.210.813.9
Positive family history of colon cancer, %18.830.76.8
Ever use PMH, %39.151.045.4
Duration of PMH use, y5.9 (0.9)5.8 (0.5)6.0 (0.7)
Ever use oral contraceptive, %50.760.850.0
Duration of oral contraceptive use, y4.3 (0.4)4.7 (0.3)4.8 (0.4)
Noninduced menstrual period in last year, %16.832.323.5
Age when periods stopped, y47.3 (0.5)45.5 (0.5)46.8 (0.5)
BMI (kg/m2), %
    <25.045.643.954.4
    25.0-<30.032.033.127.2
    ≥30.022.323.018.7
Waist-to-hip ratio, %
    ≤0.77023.427.824.4
    0.771-0.82018.123.323.1
    0.821-0.88031.721.628.6
    ≥0.88126.827.323.9
  • NOTE: Primary indication for colonoscopy was not available for 14.4% of cases and 0.01% of Digestive Healthcare controls.

  • * Mean and SE unless otherwise indicated.

  • BMI categories based on WHO cutoff points.