Table 3.

Occupational physical activity and endometrial cancer risk, the Shanghai Endometrial Cancer Study (1997-2001)

Job code indicesCases/controls*All women, OR (95% CI)Premenopausal, OR (95% CI)Postmenopausal, OR (95% CI)
Sitting
    Q1 (less)190/2061.001.001.00
    Q2205/2100.98 (0.73-1.33)1.32 (0.81-2.14)0.81 (0.55-1.19)
    Q3214/2130.96 (0.71-1.31)1.34 (0.83-2.18)0.75 (0.50-1.14)
    Q4 (more)223/2160.93 (0.67-1.30)1.90 (1.04-3.49)0.64 (0.42-0.99)
Ptrend0.670.050.05
Activity energy expenditure
    Q1 (less)213/2121.001.001.00
    Q2209/2130.80 (0.60-1.08)0.67 (0.42-1.07)0.96 (0.65-1.43)
    Q3221/2031.05 (0.78-1.42)0.95 (0.60-1.50)1.15 (0.76-1.72)
    Q4 (more)189/2030.86 (0.63-1.18)0.75 (0.41-1.38)0.89 (0.60-1.32)
Ptrend0.700.570.68
Self-rating of exertion
    Q1 (less)208/2041.001.001.00
    Q2221/2210.99 (0.74-1.32)1.00 (0.63-1.57)1.08 (0.73-1.61)
    Q3203/2050.97 (0.72-1.32)0.79 (0.49-1.26)1.15 (0.77-1.74)
    Q4 (more)199/2150.87 (0.64-1.20)0.79 (0.46-1.37)0.96 (0.64-1.44)
Ptrend0.420.280.82
Standing and walking (h/d)
    0-1.6339/3321.001.001.00
    1.7-3.3218/2120.96 (0.74-1.25)0.92 (0.59-1.41)0.96 (0.68-1.33)
    3.4-5.5144/1770.81 (0.61-1.07)0.85 (0.54-1.34)0.78 (0.54-1.14)
    5.6-13.3131/1231.09 (0.79-1.50)1.20 (0.67-2.14)1.03 (0.70-1.53)
Ptrend0.780.930.70
  • Abbreviation: 95% CI, 95% confidence interval.

  • * n values for all cases and controls.

  • Adjusted for age, age at menarche, menopausal status and age, number of pregnancies, oral contraceptive use, current smoking, ever drinking, family history of cancer, education, height, and body mass index.