Table 2.
Demographics of Study Participants
| Annual visit controls (n = 203) | Problem visit controls (n = 151) | ||||
|---|---|---|---|---|---|
| Characteristic | Endometrial cancer cases (n = 75) | p | p | ||
| Mean age (year) | 59.7 | 49.8 | <0.01 | 51.0 | <0.01 |
| Mean BMI (kg/m2) | 35.5 | 29.4 | <0.01 | 30.9 | <0.01 |
| Race, n (%) | <0.01 | <0.01 | |||
| White | 56 (74.7) | 107 (53.2) | 47 (32.0) | ||
| Black | 8 (10.7) | 76 (37.8) | 74 (50.3) | ||
| Asian | 0 (0) | 6 (3) | 10 (6.8) | ||
| Other | 11 (14.6) | 12 (6) | 16 (10.9) | ||
| Mean age at menarche (year) | 12.7 | 12.8 | 0.48 | 12.2 | 0.03 |
| Mean age at menopause (year) | 51.6 | 50.3 | 0.06 | 51.2 | 0.64 |
| Menstrual status, n (%) | <0.01 | <0.01 | |||
| Regular menses | 4 (5.3) | 63 (31.3) | 37 (24.7) | ||
| Irregular | 14 (18.7) | 30 (14.9) | 35 (23.3) | ||
| Postmenopausal | 57 (76.0) | 108 (53.7) | 78 (52.0) | ||
| Pattern of menstrual cycle, n (%) | 0.08 | 0.61 | |||
| Regular | 57 (76.0) | 173 (85.2) | 120 (79.5) | ||
| Irregular | 18 (24.0) | 30 (14.8) | 31 (20.5) | ||
| Mean parity | 2.6 | 2.2 | 0.05 | 2.3 | 0.18 |
| Hormone use, n (%) | |||||
| History of combined hormonal contraceptive use | 55 (73.3) | 168 (84.8) | 0.04 | 127 (85.2) | 0.05 |
| Current combined hormonal contraceptive use | 0 (0) | 32 (19.6) | 19 (15.6) | ||
| History of combined hormone replacement therapy | 8 (10.8) | 26 (13.2) | 0.68 | 17 (11.3) | >0.99 |
| Current combined hormone replacement therapy | 2 (25) | 9 (31.9) | 6 (35.3) | ||
| History of estrogen only | 15 (20.3) | 25 (12.7) | 0.13 | 15 (10.1) | 0.06 |
| Current estrogen only | 0 (0) | 3 (16.6) | 3 (21.4) | ||
BMI, body mass index.