Table 1.
Baseline characteristics of all cycles in the training and validation cohorts.
| Variables | Training cohort (n=3121) | Validation cohort (n=1039) | Z/χ2 value | P value |
|---|---|---|---|---|
| Age (years) | 33 (30,37) | 33 (30,37) | 0.354 | 0.723 |
| BMI (kg/m2) | 22.86 (20.80,25.39) | 23.00 (20.96,25.39) | 1.073 | 0.283 |
| Duration of infertility (years) | 3 (1.5,5) | 3 (1.5,5) | 0.414 | 0.679 |
| Infertility type (%) | 0.186 | 0.666 | ||
| Primary | 39.38 (1229/3121) | 40.14 (417/1039) | ||
| Secondary | 60.62 (1892/3121) | 59.87 (622/1039) | ||
| Basal FSH (IU/L) | 6.71 (5.50,8.18) | 6.75 (5.65,8.28) | 1.601 | 0.109 |
| Basal LH (IU/L) | 4.67 (3.38,6.22) | 4.55 (3.44,6.19) | -0.038 | 0.970 |
| Basal E2 (pg/mL) | 38.33 (29.16,50.65) | 37.83 (28.41,50.15) | -0.877 | 0.380 |
| Basal P (ng/mL) | 0.25 (0.15,0.38) | 0.26 (0.15,0.38) | 0.615 | 0.539 |
| AMH (ng/mL) | 2.15 (1.12,3.98) | 1.97 (1.11,3.78) | -1.067 | 0.286 |
| AFC (n) | 11 (6,16) | 10 (6,15) | -1.111 | 0.266 |
Continuous variables are presented as the median (interquartile range) or mean ± standard deviation. Categorical variables are presented as percentages. Positive number/total number in brackets. BMI represents body mass index, FSH represents follicle-stimulating hormone, LH represents luteinizing hormone, E2 represents estradiol, P represents progesterone, AMH represents anti-mullerian hormone, and AFC represents antral follicle counting.