Table 1.

Descriptive comparisons between cases (n = 832) and controls (n = 846) on endometrial cancer risk, the Shanghai Endometrial Cancer Study (1997-2001)

Case/controls*OR (95% CI)
Education
    No formal education75/1081.00
    Elementary129/1261.47 (1.01-2.16)
    Junior high school296/2861.49 (1.07-2.09)
    High school207/2271.31 (0.93-1.86)
    Post-high school/college125/991.82 (1.22-2.70)
Family income (Yuan)
    <10,00095/891.00
    10,000-15,000199/1940.96 (0.68-1.36)
    15,000-20,000166/1551.00 (0.70-1.44)
    20,000-30,000197/2440.76 (0.54-1.07)
    >30,000174/1631.00 (0.70-1.43)
Reproductive factors
    Age at menarche (y)
        9-12108/781.00
        13-14334/3010.81 (0.58-1.12)
        15167/1780.68 (0.48-0.98)
        >16221/2870.56 (0.40-0.79)
    No. pregnancies
        0/1199/1441.00
        2199/2080.69 (0.52-0.93)
        3194/2070.68 (0.51-0.91)
        4141/1570.65 (0.48-0.89)
        >599/1300.55 (0.39-0.77)
    Menopause
        No327/3001.00
        Yes505/5460.85 (0.70-1.03)
    Age at menopause (y)
        17-4669/1321.00
        47-4890/1171.45 (0.97-2.16)
        49-50146/1551.78 (1.23-2.57)
        >51199/1422.64 (1.84-3.79)
    Oral contraceptive use
        Never685/6391.00
        Ever147/2070.66 (0.52-0.84)
Lifestyle factors
    Current smoker
        No823/8161.00
        Yes7/250.28 (0.12-0.65)
    Drink ever
        No812/8041.00
        Yes20/420.47 (0.27-0.81)
    Family history of cancer
        No535/6131.00
        Yes289/2281.45 (1.18-1.79)
Body size
    Height (cm)
        140-152148/1841.00
        153-156201/1951.26 (0.94-1.69)
        157-160246/2471.22 (0.92-1.61)
        160-174233/2181.31 (0.99-1.74)
    Body mass index (kg/m2)
        14.5-21.3120/2111.00
        21.4-23.5166/1981.40 (1.04-1.90)
        21.6-26.1214/2161.66 (1.24-2.21)
        26.2-41.9323/2162.50 (1.90-3.31)
    Waist/hip ratio
        0.60-0.7799/2031.00
        0.78-0.80136/1901.44 (1.04-1.99)
        0.81-0.84237/2152.22 (1.64-2.99)
        0.85-1.21356/2343.06 (2.29-4.08)
  • Abbreviation: 95% CI, 95% confidence interval.

  • * n values for cases and controls may be <832/846 due to missing data for some variables.