Detection and risk stratification of women at high risk of preterm birth in rural communities near Nagpur, India

Table 3 Performance of Risk-Stratification as a Predictor of Preterm Birth

Number of HRPB Signs or symptoms	Outcome – Reference Standard (N)		Probability of Delivering Preterm	Likelihood Ratio (95% Confidence Interval)	Odds Ratio from GEE Model (95% Confidence Interval) ^a
Number of HRPB Signs or symptoms	Preterm	Term
0	353	5965	0.06	0.55 (0.50–0.60)	Reference
1	173	273	0.39	5.89 (4.44–7.81)	10.3 (8.14–13.0)
2	139	116	0.55	11.05 (7.51–16.27)	19.4 (14.6–25.8)
3 or more	21	10	0.68	19.51 (0.84–454.0)	37.7 (17.4–81.9)
Total	686	6364

^a Results are based on multivariable logistic regression analyses that included the following covariates and was adjusted for inter-cluster differences using GEE: mother’s age, education, parity and anemia
Cochran - Armitage test for linear trend: Χ² (1 df) = 1215.81, p = 2.2 × 10⁻²⁶⁶

ISSN: 1471-2393