Table 2.
Dose at First Ovulatory Response1 | Unadjusted |
Adjusted |
||||
---|---|---|---|---|---|---|
Overall2 | Clomiphene | Letrozole | Overall | Clomiphene | Letrozole | |
AMH | ||||||
First dose | 4.90 (4.38, 5.47)a | 5.45 (4.66, 6.38)a | 4.43 (3.79, 5.18)a | 4.75 (4.31, 5.23)a | 4.94 (4.29, 5.70)a | 4.66 (4.08, 5.33)a |
Second dose | 6.07 (5.39, 6.83)ab | 5.43 (4.53, 6.52)a | 6.56 (5.60, 7.68)b | 5.98 (5.40, 6.63)b | 5.74 (4.89, 6.74)ab | 6.05 (5.28, 6.93)b |
Third dose | 6.04 (5.34, 6.84)ab | 6.17 (5.19, 7.34)a | 5.92 (4.96, 7.07)ab | 6.21 (5.58, 6.92)b | 6.41 (5.50, 7.48)ab | 5.97 (5.13, 6.95)ab |
Never ovulated | 6.87 (5.99, 7.88)b | 6.81 (5.77, 8.04)a | 6.97 (5.49, 8.85)b | 7.09 (6.29, 7.99)b | 7.01 (6.04, 8.13)b | 7.33 (5.96, 9.01)b |
P-trend | 0.0002 | 0.04 | 0.002 | <0.0001 | 0.0006 | 0.0004 |
AMH per follicle | ||||||
First dose | 0.12 (0.10, 0.14)ac | 0.13 (0.11, 0.17)a | 0.11 (0.09, 0.13)a | 0.12 (0.10, 0.13)a | 0.12 (0.10, 0.14)a | 0.11 (0.09, 0.14)a |
Second dose | 0.16 (0.14, 0.19)b | 0.14 (0.11, 0.18)a | 0.17 (0.14, 0.21)b | 0.16 (0.14, 0.18)b | 0.15 (0.12, 0.19)ab | 0.16 (0.13, 0.19)b |
Third dose | 0.16 (0.14, 0.19)c | 0.15 (0.12, 0.19)a | 0.17 (0.14, 0.22)b | 0.17 (0.15, 0.20)b | 0.16 (0.13, 0.20)ab | 0.18 (0.14, 0.21)b |
Never ovulated | 0.17 (0.14, 0.21)bc | 0.18 (0.14, 0.23)a | 0.15 (0.11, 0.21)ab | 0.18 (0.15, 0.21)b | 0.19 (0.15, 0.23)a | 0.16 (0.12, 0.21)ab |
P-trend | 0.002 | 0.05 | 0.008 | <0.0001 | 0.002 | 0.004 |
Antral Follicle Count | ||||||
First dose | 41.3 (38.2, 44.6)a | 40.9 (36.6, 45.7)a | 41.6 (37.5, 46.3)ab | 41.3 (38.3, 44.6)a | 41.7 (37.4, 46.6)a | 41.3 (37.1, 45.9)ab |
Second dose | 38.4 (35.4, 41.7)a | 38.7 (34.1, 43.9)a | 38.2 (34.3, 42.5)ab | 38.4 (35.3, 41.6)a | 37.9 (33.4, 42.9)a | 38.5 (34.5, 42.9)ab |
Third dose | 36.9 (33.9, 40.2)a | 40.0 (35.4, 45.1)a | 34.1 (30.3, 38.5)a | 36.8 (33.8, 40.1)a | 39.8 (35.3, 44.9)a | 34.2 (30.3, 38.7)a |
Never ovulated | 40.6 (36.9, 44.6)a | 38.3 (34.1, 43.1)a | 45.2 (38.4, 53.3)b | 40.7 (36.9, 44.7)a | 38.2 (34.0, 43.0)a | 45.2 (38.3, 53.3)b |
P-trend | 0.45 | 0.52 | 0.65 | 0.45 | 0.39 | 0.73 |
Dose: For letrozole: first dose, 2.5 mg; second dose, 5.0 mg; third dose, 7.5 mg; and for clomiphene: first dose, 50 mg; second dose, 100 mg; third dose, 150 mg.
Values are geometric means and 95% CIs. Labeled means without a common letter differ. P < .05 (adjusted for multiple comparisons).