Table 1 Participant’s characteristics of training set and validation set
From: Evaluation of factors that predict the success rate of trial of labor after the cesarean section
Characteristics | Training set (N = 551) | Validation set (N = 227) | χ2 | P value |
|---|---|---|---|---|
Age (years) | ||||
< 35 | 395 (71.69) | 160 (70.48) | 0.114 | 0.736 |
≥ 35 | 156 (28.31) | 67 (29.52) | ||
Education level | ||||
Lower than bachelor | 293 (53.18) | 128 (56.39) | 0.668 | 0.414 |
Bachelor degree or above | 258 (46.82) | 99 (43.61) | ||
Gravidity | ||||
2 | 220 (39.93) | 89 (39.21) | 0.035 | 0.852 |
> 2 | 331 (60.07) | 138 (60.79) | ||
Parity | ||||
1 | 241 (43.74) | 104 (45.81) | 0.281 | 0.596 |
> 1 | 310 (56.62) | 123 (54.19) | ||
Pre-pregnancy BMI (kg/m2) | ||||
< 24 | 428 (77.68) | 171 (75.33) | 0.500 | 0.480 |
≥ 24 | 123 (22.32) | 56 (24.67) | ||
Excessive gestational weight gain | ||||
No | 376 (68.24) | 164 (72.25) | 1.216 | 0.270 |
Yes | 175 (31.76) | 63 (27.75) | ||
Lower uterine segment (LUS) thickness (mm) | ||||
< 2.70 | 111 (20.15) | 55 (24.23) | 1.598 | 0.206 |
≥ 2.70 | 440 (79.85) | 172 (75.77) | ||
Cervix Bishop score | ||||
< 5 | 243 (44.10) | 92 (40.63) | 0.837 | 0.360 |
≥ 5 | 308 (55.90) | 135 (59.47) | ||
Past vaginal delivery history | ||||
No | 498 (90.38) | 207 (91.19) | 0.124 | 0.725 |
Yes | 53 (9.62) | 20 (8.81) | ||
Time interval from previous cesarean section (year) | ||||
< 9 | 479 (86.93) | 197 (86.78) | 0.003 | 0.955 |
≥ 9 | 72 (13.07) | 30 (13.22) | ||
Neonatal birth weight (g) | ||||
< 3300 | 208 (37.75) | 88 (38.77) | 0.071 | 0.791 |
≥ 3300 | 343 (62.25) | 139 (61.23) | ||
Gestational age (week) | ||||
< 39 | 173 (31.40) | 75 (33.04) | 0.200 | 0.655 |
≥ 39 | 378 (68.60) | 152 (66.96) | ||