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

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

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
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    
  1. 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
  2. Cochran - Armitage test for linear trend: Χ2 (1 df) = 1215.81, p = 2.2 × 10−266