Table 2.

Demographic data between SPR relative intensity ≥17 a.u. and <17 a.u.

SPR relative intensity	≥17 a.u.	<17 a.u.	p value
No.	11 (34.38%)	21 (65.62%)
Detection weeks	28.82 ± 4.07	30.48 ± 4.07	0.282
Cervical dilatation (cm)	0.36	0.14	0.290
Regular uterine contractions (≥10″/≤3′)	6 (54.55%)	4 (19.05%)	0.040
Hospitalization for tocolysis	11 (100%)	15 (71.43%)	0.049
Delivery weeks	33.00 ± 5.39	36.90 ± 2.90	0.043