Table 3.
Baseline characteristics of the training and validation group
| Training group (n=8129) | Validation group (n=3469) | P value | |
| Outcomes | 0.610 | ||
| LFR | 230 (2.8) | 88 (2.5) | |
| TFF | 256 (3.1) | 104 (3.0) | |
| Baseline characteristics | |||
| Age, mean (SD) | 31.8 (4.7) | 31.8 (4.7) | 0.688 |
| BMI (kg/m2), mean (SD) | 22.0 (3.5) | 22.1 (3.1) | 0.387 |
| Infertility years, mean (SD) | 3.8 (3.1) | 3.9 (3.2) | 0.013 |
| Infertility diagnosis, n (%) | 0.050 | ||
| Tubal factor | 5804 (71.4) | 2472 (71.3) | |
| Diminished ovarian reserve | 854 (10.5) | 383 (11.0) | |
| Ovulatory dysfunction | 158 (1.9) | 78 (2.2) | |
| Uterine factor | 226 (2.8) | 109 (3.1) | |
| Sperm factor | 554 (6.8) | 187 (5.4) | |
| Unexplained infertility | 533 (6.6) | 240 (6.9) | |
| Primary infertility, n (%) | 3582 (44.1) | 1478 (42.6) | 0.147 |
| Gravidity, n (%) | 0.297 | ||
| 0 | 3220 (39.6) | 1334 (38.5) | |
| 1 | 2069 (25.5) | 928 (26.8) | |
| ≥2 | 2840 (34.9) | 1207 (34.8) | |
| Parity, n (%) | 0.131 | ||
| 0 | 6827 (84.0) | 2952 (85.1) | |
| ≥1 | 1302 (16.0) | 517 (14.9) | |
| Induced abortion, n (%) | 2630 (32.4) | 1140 (32.9) | 0.592 |
| Miscarriage, n (%) | 1157 (14.2) | 502 (14.5) | 0.737 |
| Basal FSH (mIU/mL), mean (SD) | 8.3 (3.3) | 8.4 (3.6) | 0.241 |
| Basal LH (mIU/mL), mean (SD) | 4.5 (3.3) | 4.6 (3.5) | 0.261 |
| AMH (ng/mL), mean (SD) | 3.2 (2.4) | 3.2 (2.4) | 0.951 |
| AFC, mean (SD) | 13.5 (7.7) | 13.3 (7.7) | 0.350 |
Continuous variables are expressed as mean (SD), categorical variables as absolute frequencies, n (%).
AFC, antral follicle count; AMH, anti-Müllerian hormone; BMI, body mass index; FSH, follicular-stimulating hormone; LFR, low fertilisation rate; LH, luteinising hormone; TFF, total fertilisation failure.