| Clinic 1 | Clinic 2 | Clinic 3 |
---|---|---|---|
N = 1981 | N = 2050 | N = 1981 | |
Age, mean (SD) | 50.9 (4.4) | 52.2 (4.4) | 53.3 (4.4) |
Years since final menstrual period, mean (SD) | 1.90 (3.4) | 2.54 (3.8) | 3.19 (4.3) |
Menopausal stage | |||
 Pre-menopause, N (%) | 749 (38%) | 544 (27%) | 394 (20%) |
 Peri-menopause, N (%) | 532 (27%) | 532 (26%) | 479 (24%) |
 Post-menopause, N (%) | 659 (33%) | 807 (39%) | 925 (47%) |
 Unable to determine, N (%) | 41 (2%) | 167 (8%) | 183 (9%) |
Cognitive function score | |||
 Immediate verbal episodic memory, mean (SD), sample range 3–25 | 15.6 (3.6) | 16.0 (3.3) | 16.6 (3.3) |
 Delayed verbal episodic memory, mean (SD), sample range 0–25 | 14.4 (3.8) | 15.0 (3.6) | 15.9 (3.5) |
 Working memory, mean (SD), sample range 2–14 | 7.1 (2.4) | 7.2 (2.3) | 7.4 (2.3) |
 Processing speed, mean (SD), sample range 10–133 | 80.7 (13.8) | 82.8 (13.6) | 83.7 (14.0) |
 Verbal intelligence, mean (SD), sample range 0–60 | 44.1 (7.7) | 44.2 (7.3) | 44.2 (7.4) |
 Verbal fluency, mean (SD), sample range 0–98 | 43.2 (12.0) | 45.1 (12.5) | 45.8 (12.6) |
Education | |||
 CSE / Vocational / O-level, N (%) | 925 (47%) | 977 (48%) | 930 (47%) |
 A-level, N (%) | 597 (30%) | 618 (30%) | 599 (30%) |
 Degree, N (%) | 459 (23%) | 455 (22%) | 452 (23%) |
Age at first pregnancy, mean (SD) | 26.7 (4.7) | 26.6 (4.8) | 26.6 (4.7) |
Reproductive hormones | |||
 AMH (ng/ml), median (IQR) | 0.01 (0.01–0.17) | 0.01 (0.01–0.08) | 0.01 (0.01–0.03) |
 FSH (mIU/ml), median (IQR) | 35.9 (7.4–74.2) | 58.0 (11.7–87.9) | 63.8 (18.7–88.9) |
 LH (mIU/ml), median (IQR) | 24.4 (7.3–40.0) | 31.5 (10.6–44.0) | 31.8 (15.4–43.2) |