Table 2

Selected characteristics of participants with and without ovarian cancer

Cases (n = 254)Controls (n = 652)P
No.(%)No.(%)
Age at interview (years): mean (SD)47.5 (12.6)48.0 (10.2)
 ≤34a4216.5639.7
 35–4910039.428543.7
 50–648633.926540.6
 ≥652610.3396.0
Area of resident
 Urbana14858.335454.3
 Rural10641.729845.7
Income in 1998 (year/month)< 0.01
 ≤1000a19376.057187.6
 1001–20005019.76910.6
 ≥2001114.3121.8
Education
 Nonea4417.313320.4
 Primary7328.721633.1
 Secondary9537.523035.3
 Tertiary4216.57311.2
BMI (5 years ago, kg/m2)
 ≤18.5a166.3588.9
 18.5–24.519074.849676.1
 ≥254818.99815.0
Vigorous activity<0.01
 Never (0 h/week)a20279.545669.9
 Ever (>1 h/week)5220.519630.1
Overall tea consumption<0.01
 Nevera11344.516625.5
 Ever14155.548674.5
Alcohol consumptionb
 Nevera19777.645269.5
 Ever5722.419830.5
Coffee consumptionb
 Nevera24797.262996.8
 Ever72.8213.2
 Tobacco smoking
 Nevera24998.063497.2
 Ever52.0182.8
Marital status<0.01
 Never marrieda72.881.2
 Married23190.961093.6
 Widowed, divorced, separated166.3345.2
 Menopause statusb
 Noa15059.139460.6
 Yes10440.925639.4
No. of delivery of full-term pregnancyb< 0.05
 0a3513.8426.5
 18633.922033.8
 27730.323335.8
 ≥35622.015523.8
Oral contraceptive useb<0.01
 Nevera19878.041664.0
 Ever5622.023436.0
 Tubal ligationb
 Noa18472.444768.8
 Yes7027.620331.2
Ovarian cancer in first degree relativesb<0.01
 Noa24897.664999.8
 Yes62.410.2
  • a Reference category.

  • b Data missing for two controls.