| comparison according to latency period (two days) regarding demographic and basal characteristics | ||||
Characteristics | Within (N = 57) | After (N = 148) | P-value | ||
Demographic | Age (years) | 26.6 ± 4.5 | 26.9 ± 6.1 | 0.753 | |
BMI (kg/m2) | 23.4 ± 3.7 | 20.6 ± 2.7 | <0.001* | ||
Parity | Primi | 16 (28.1%) | 61 (41.2%) | 0.082 | |
Multi | 41 (71.9%) | 87 (58.8%) | |||
Enrollment GA (week) | 33.0 ± 1.5 | 32.8 ± 1.9 | 0.501 | ||
Basal | TLC (×103/mL) | 9.2 ± 3.8 | 8.4 ± 2.2 | 0.049* | |
AFI (cm) | 4.2 ± 1.1 | 4.8 ± 1.4 | 0.016* | ||
Cervical length (mm) | 23.6 ± 3.5 | 26.0 ± 2.4 | <0.001* | ||
Posterior uterocervical angle (˚) | 111.5 ± 3.9 | 106.8 ± 4.9 | <0.001* | ||
Anterior uterocervical angle (˚) | 111.3 ± 4.4 | 104.6 ± 4.4 | <0.001* |