Table 2.
Antenatal and peripartum management characteristics of sPTB, pi-PTB and term births.
| Characteristics | sPTB | RR (95%CI) | pi-PTB | RR (95%CI) | Term births |
|---|---|---|---|---|---|
| Use of vaginal progesterone*a | |||||
| None | 62 (80.5%) | Ref. | 42 (91.4%) | Ref. | 987 (96%) |
| 1 Trimester only | 6 (7.8%) | 3.76 [078–18.01] | 2 (4.3%) | 2.13 [0.24–18.96] | 21 (2%) |
| 1st, 2nd and/or 3rd trimesters | 9 (11.7%) | 5.08 [1.76–14.66] | 2 (4.3%) | 2.13 [0.42–10.74] | 21 (2%) |
| Cerclage | |||||
| Yes | 1 (1.3%) | 3.62 [1.07–12.22] | 0 (0%) | — | 4 (0.3%) |
| No | 77 (98.7%) | Ref. | 47 (100%) | Ref. | 1,161 (99.7%) |
| Pessary | |||||
| Yes | 3 (3.8%) | 5.55 [3.17–9.71] | 2 (4.3%) | 6.86 [3.39–13.88] | 5 (0.5%) |
| No | 75 (96.2%) | Ref. | 45 (95.7%) | Ref. | 1,035 (99.5%) |
| History of preterm labor or pPROM# | |||||
| Yes | 24 (30.8%) | 8.27 [3.70–18.51] | 1 (2.1%) | 0.67 [0.02–19.09] | 33 (3.2%) |
| No | 54 (69.2%) | Ref. | 46 (97.9%) | Ref. | 1,007 (96.8%) |
| Antenatal Steroids#a | |||||
| Yes | 33 (50%) | 9.45 [7.19–12.42] | 31 (73.8%) | 26.53 [7.97–88.32] | 51 (6.3%) |
| No | 33 (50%) | Ref. | 11 (26.2%) | Ref. | 761 (93.7%) |
| Tocolysis# | |||||
| Yes | 8 (10.3%) | 6.27 [2.73–14.42] | 2 (4.3%) | 3.41 [0.23–51.27] | 12 (1.2%) |
| No | 70 (89.7%) | Ref. | 45 (95.7%) | Ref. | 1,028 (98.8%) |
*Initiated until 28 weeks. #Before the admission when the birth occurred; childbirth did not occur during the admission due to preterm labor or pPROM, and women were discharged. Missing information for: a13.