Table 1.

Comparison of cases and controls with genotyping data on demographic characteristics and selected risk factors for endometrial cancer, the Shanghai Endometrial Cancer Study, 1997 to 2003

Participant characteristicsCases (n = 1,028)Controls (n = 1,003)P*
Age (y; ± SD)54.3 ± 8.554.4 ± 8.50.87
≥Middle school education (%)78.378.00.85
Regular smoker (%)3.13.60.55
Regular alcohol consumption (%)3.15.30.01
First degree relative with cancer (%)35.729.6<0.01
Age at menarche ( ± SD)14.5 ± 1.714.8 ± 1.8<0.01
Postmenopausal (%)56.861.50.03
Age at menopause ( ± SD)50.3 ± 3.649.0 ± 3.6<0.01
Years of menstruation ( ± SD)32.8 ± 4.930.7 ± 5.3<0.01
Number of live births ( ± SD)2.6 ± 1.42.8 ± 1.3<0.01
Ever used oral contraceptives (%)18.025.3<0.01
Ever used hormone replacement therapy (%)4.84.40.68
Diagnosis of diabetes (%)15.16.9<0.01
Body mass index ( ± SD)25.8 ± 4.123.8 ± 3.5<0.01
Waist-to-hip ratio ( ± SD)0.84 ± 0.050.82 ± 0.06<0.01
Engaged in regular physical activity (%)28.233.9<0.01
  • * For χ2 test (categorical variables) or nonparameter Wilcoxon test (continuous variables).

  • Only among postmenopausal women.