Table 6.
Variable | Unadjusted RR (95% CI) |
P- value |
Adjusted RR (95% CI) |
p-value |
---|---|---|---|---|
Admission gestational age, per one week increase | 0.87 (0.81 – 0.95) | 0.001 | 0.89 (0.82 – 0.96) | 0.003 |
Received tocolysis | 3.02 (1.26 – 7.24) | 0.013 | 2.64 (1.05 – 6.62) | 0.038 |
Caucasian race | 0.66 (0.42 – 1.04) | 0.070 | 0.68 (0.43 – 1.08) | 0.102 |
Cervical dilation at presentation | ||||
4 centimeters | referent | referent | ||
5 centimeters | 0.65 (0.37 – 1.15) | 0.137 | 0.61 (0.35 – 1.06) | 0.081 |
6 centimeters | 0.42 (0.19 – 0.95) | 0.037 | 0.48 (0.22 – 1.05) | 0.066 |
7 centimeters | 0.59 (0.27 – 1.30) | 0.191 | 0.74 (0.35 – 1.59) | 0.445 |
Potential confounders dropped from the final model (p>0.20) included: maternal body mass index, nulliparity, and chorioamnionitis.