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*