Table 1.
Comparison of demographic and clinical characteristics of the four groups.
| GROUP | Group 1 | Group 2 | Group 3 | Group 4 | P |
|---|---|---|---|---|---|
| No. of cases | 385 | 180 | 165 | 510 | |
| Age (years) | 28.91 ± 3.38 | 28.27 ± 3.55 | 29.12 ± 3.47 | 28.51 ± 3.56 | 0.051 |
| BMI (kg/m2) | 21.06 ± 1.67 | 22.29 ± 1.43a | 26.54 ± 2.27ab | 28.27 ± 2.85abc | <0.001 |
| HOMA-IR | 1.73 ± 0.53 | 4.00 ± 1.55a | 2.02 ± 0.48ab | 5.11 ± 2.26abc | <0.001 |
| LH (IU/L) | 10.85 ± 6.42 | 9.63 ± 5.47 | 9.52 ± 5.17 | 8.51 ± 4.62a | <0.001 |
| FSH (IU/L) | 6.13 ± 1.44 | 5.81 ± 1.45 | 5.90 ± 1.56 | 5.82 ± 1.55a | 0.016 |
| T(ng/m) | 0.39 ± 0.20 | 0.43 ± 0.22 | 0.41 ± 0.18 | 0.45 ± 0.22a | <0.001 |
| AMH (ng/ml) | 9.18 ± 4.70 | 8.87 ± 4.51 | 8.93 ± 4.92 | 7.80 ± 4.33ab | <0.001 |
| Duration of infertility (years) | 3.34 ± 2.07 | 3.66 ± 2.18 | 3.56 ± 2.13 | 4.15 ± 2.41ac | <0.001 |
| Type of infertility (%) | 0.639 | ||||
| Primary | 69.09 (266/385) | 66.11 (119/180) | 63.64 (105/165) | 66.67 (340/510) | |
| Secondary | 30.91 (119/385) | 33.89 (61/180) | 36.36 (60/165) | 33.33 (170/510) | |
| Methods of ART (%) | 0.061 | ||||
| IVF | 82.34 (317/385) | 84.44 (152/180) | 90.30 (149/149) | 87.06 (444/510) | |
| ICSI | 17.66 (68/385) | 15.56 (28/180) | 9.70 (16/149) | 12.94 (66/510) |
1 a, Significantly different to Group 1; b, Significantly different to Group 2; c, Significantly different to Group 3.
Group 1, NOW-NIR; Group 2, NOW-IR; Group 3, OW-NIR; Group 4, OW-IR.