Table 2.
Multivariate Cox regression models of time to delivery.
| Factor | Model I | Model II | ||
|---|---|---|---|---|
| Hazard Ratio (95% CI) | p Value | Hazard Ratio (95% CI) | p Value | |
| Age (≥30 years) | 0.98 (0.62–1.55) | 0.922 | 0.98 (0.62–1.56) | 0.929 |
| Gestational age at start of drug therapy (≥28 weeks) | 6.81 (3.48–13.33) | <0.001 | 8.92 (4.27–18.62) | <0.001 |
| Modified Bishop score (≥2) | 1.92 (1.23–3.01) | 0.004 | 1.77 (1.11–2.82) | 0.016 |
| GRK5 rs4752292 Homozygous variant (GG) | 0.64 (0.41–0.99) | 0.047 | ||
| GRK5 rs1020672 Homozygous variant (TT) | 0.62 (0.38–0.99) | 0.045 | ||
Adjusted for factors with p-value < 0.1 from results of univariate analysis in addition to age.