Table 4.
Baseline characteristics in different age brackets.
| Total | 38/39 y | 40/41 y | 42/43 y | ≥44 y | P | |
|---|---|---|---|---|---|---|
| N = 826 | N = 424 | N = 226 | N = 118 | N = 58 | ||
| BMI (kg/m2) | 23.44 (21.83, 25.90) | 23.34 (21.60, 25.70) | 23.90 (22.12, 25.99) | 23.42 (21.86, 26.04) | 24.61 (22.00, 26.73) | 0.061 |
| Primary infertility, | 180 (21.79%) | 103 (24.29%) | 46 (20.35%) | 22 (18.64%) | 9 (15.51%) | 0.277 |
| Years of infertility | 4 (2,8) | 4 (2,8) | 4 (2,8) | 2.5 (1,6.75) | 2 (1,9) | 0.229 |
| AFC | 8 (6,11) | 9 (6,12) | 8 (6,11) | 6 (4.5,10) | 5 (4,7) | <0.001 |
| FSH (mIU/ml) | 7.78 (6.49,10.00) | 7.62 (6.37,9.74) | 7.76 (6.44,9.67) | 8.42 (6.82,10.85) | 8.95 (7.22,11.30) | 0.008 |
| LH (mIU/ml) | 3.93 (2.94,5.40) | 3.93 (2.92,5.54) | 4.11 (2.95,5.26) | 3.82 (2.95,5.36) | 3.9 (3.00,8.64) | 0.989 |
| E2 (ng/L) | 39.00 (27.00, 59.00) | 39.00 (26.50, 55.00) | 42.00 (28.00, 61.00) | 37.00 (25.00, 59.00) | 44.00 (26.50, 69.00) | 0.401 |
| AMH (ng/ml) | 1.49 (0.90,2.57) | 1.74 (1.09,2.71) | 1.64 (1.06,2.57) | 1.10 (0.52,2.67) | 0.83 (0.48,1.25) | 0.231 |
| Endometrium thickness (mm) | 10 (9,11) | 10 (9,11) | 10 (9,12) | 10 (8.1,11) | 10 (9,11) | 0.832 |