Table 1.
Description of the sample by case–control status
| Cases (N = 556) | Controls (N = 533) | Pc | |
|---|---|---|---|
| Demographic and lifestyle factors | |||
| Agea | 60.80 (9.39) | 61.76 (10.93) | 0.122d |
| Raceb | 0.222 | ||
| White | 514 (92.45) | 503 (94.37) | |
| Other | 42 (7.55) | 29 (5.44) | |
| Educationb | 0.015 | ||
| ≤12 years | 187 (33.63) | 143 (26.83) | |
| >12 years | 369 (66.37) | 390 (73.17) | |
| Body mass index (kg/m2)a | 32.33 (8.51) | 27.15 (6.26) | <0.001 |
| Smoking statusb | 0.080 | ||
| Never smoker | 308 (55.40) | 262 (49.16) | |
| Ever smoker | 248 (44.60) | 271 (50.84) | |
| Ever drank alcohol regularlyb | 264 (47.74) | 312 (58.54) | <0.001 |
| Physical activity hours per weeka | 5.48 (10.69) | 8.41 (12.54) | <0.001 |
| Sit hours per weeka | 39.14 (20.32) | 44.93 (20.54) | <0.001 |
| Calories per daya | 1,749 (720) | 1,690 (637) | 0.149 |
| Polyunsaturated fat (g/day)a | 14.31 (9.39) | 13.71 (7.25) | 0.177 |
| Reported fish oil supplement usage (ever)b | 85 (15.34) | 126 (23.64) | 0.001 |
| Reproductive factors | |||
| Number of live birthsa | 1.79 (1.36) | 2.19 (1.30) | <0.001 |
| Ever Gravidb | 439 (78.96) | 474 (88.93) | <0.001 |
| Age at first pregnancya | 23.56 (4.73) | 24.73 (4.91) | <0.001 |
| Menopausal statusb | 0.039 | ||
| Premenopausal | 75 (13.49) | 100 (18.76) | |
| Postmenopausal | 480 (86.33) | 433 (81.24) | |
| Oral contraceptive use (ever)b | 323 (58.09) | 345 (64.73) | 0.079 |
| Menopausal hormone use among postmenopausal women (ever)b | 149 (31.04) | 181 (41.80.71) | 0.003 |
| Menarche ageb | 0.108 | ||
| <12 years | 151 (27.16) | 116 (21.76) | |
| ≥12 years | 401 (72.12) | 414 (77.67) | |
| Medical history | |||
| Family history (yes/no 1st degree relative with endometrial cancer)b | 39 (7.01) | 21 (3.94) | 0.026 |
| MD diagnosis of hypertension (ever)b | 312 (56.12) | 198 (37.36) | <0.001 |
| MD diagnosis of diabetes (ever)b | 108 (19.42) | 66 (12.38) | 0.002 |
a
Table values are mean (SD) for continuous variables
b
Table values are n (column %) for categorical variables
c
P value is for t test (continuous variables) or χ2 test (categorical variables)
d
Matched by design