Table 2.
Cumulative pregnancy rate of participants.
| Item | Group A, n(%) Letrozole 2.5 mg + FSH |
Group B, n(%) Letrozole 5 mg + FSH |
RR (95%CI) | P-value | |
|---|---|---|---|---|---|
| CPR | 80/110(72.7%) | 65/110(59.1%) | 1.23(1.02,1.49) | 0.033 | |
| Age, years | ≤ 28 | 45/64(70.3%) | 42/69(60.9%) | 1.16(0.9,1.48) | 0.253 |
| > 28 | 35/46(76.1%) | 23/41(56.1%) | 1.36(0.99,1.86) | 0.048 | |
| BMI, kg/m2 | < 24 | 53/70(75.7%) | 44/64(68.8%) | 1.1(0.89,1.36) | 0.368 |
| ≥ 24 | 27/40(67.5%) | 21/46(45.7%) | 1.48(1.01,2.17) | 0.042 | |
| Insulin resistance | No | 61/82(74.4%) | 52/83(62.7%) | 1.19(0.96,1.46) | 0.105 |
| Yes | 19/28(67.9%) | 13/27(48.1%) | 1.41(0.88,2.25) | 0.139 | |
| Infertility | Primary | 69/94(73.4%) | 56/91(61.5%) | 1.19(0.97,1.46) | 0.085 |
| Secondary | 11/16(68.8%) | 9/19(47.4%) | 1.45(0.81,2.59) | 0.306 a | |
| LH, IU/L | ≤ 12 | 68/93(73.1%) | 49/84(58.3%) | 1.25(1.01,1.56) | 0.038 |
| > 12 | 12/17(70.6%) | 16/26(61.5%) | 1.15(0.75,1.77) | 0.543 | |
| FSH, IU/L | ≤ 8 | 66/88(75%) | 54/92(58.7%) | 1.28(1.04,1.58) | 0.02 |
| > 8 | 14/22(63.6%) | 11/18(61.1%) | 1.04(0.64,1.69) | 0.87 | |
| LH/FSH | < 2 | 72/97(74.2%) | 56/92(60.9%) | 1.22(1,1.49) | 0.05 |
| ≥ 2 | 8/13(61.5%) | 9/18(50%) | 1.23(0.66,2.31) | 0.711 a | |
| PRL, ng/ml | ≤ 30 | 70/96(72.9%) | 56/97(57.7%) | 1.26(1.02,1.56) | 0.027 |
| > 30 | 10/14(71.4%) | 9/13(69.2%) | 1.03(0.63,1.69) | > 0.1 a | |
| T, nmol/L | ≤ 2 | 76/104(73.1%) | 59/101(58.4%) | 1.25(1.02,1.53) | 0.027 |
| > 2 | 4/6(66.7%) | 6/9(66.7%) | 1(0.48,2.08) | > 0.1 a | |
| AMH, ng/ml | ≤ 4 | 6/10(60%) | 3/6(50%) | 1.2(0.47,3.09) | > 0.1 a |
| > 4 | 74/100(74%) | 62/104(59.6%) | 1.24(1.02,1.51) | 0.029 | |
a
P-values were calculated using Fisher’s exact test. RR, relative risk; CI, confidence interval; CPR, cumulative pregnancy rate.