Table 3.
Linear Risk Factor Models for Log10-Transformed Anti-O9 Antigen–Specific Immunoglobulin G (IgG) Transfer Ratio as a Function of Several Maternal and Neonatal Covariates
| Variable | Univariate Analysis | Multivariate Analysis | ||
|---|---|---|---|---|
| β (95% CI) | P | β (95% CI) | P a | |
| Maternal age, y | −0.001 (−.004–.002) | .492 | … | |
| Maternal education level, higher secondary or above | 0.01 (−.02–.05) | .510 | … | |
| Maternal O9 antigen–specific IgG level, log10 transformed | −0.001 (−.06 to .04) | .703 | … | |
| Preterm birth, gestation <37 wk | −0.08 (−.17 to .001) | .056 | −0.11 (−.19 to −.02) | .063 |
| Low birth weight, <2500 g | −0.02 (−.10 to .06) | .558 | … | |
| Female neonatal sex | 0.04 (.005 to .07) | .024 | 0.03 (−.002 to .07) | .048 |
| Smoking or passive smoking during pregnancy | −0.003 (−.04 to .03) | .874 | … | |
| Irregular vaginal bleeding | −0.07 (−.15 to .01) | .105 | −0.07 (−.15 to .01) | .086 |
| Diabetes | 0.04 (−.04 to .12) | .335 | … | |
| Intrauterine growth restriction | −0.01 (−.12 to .09) | .785 | … | |
| Maternal hypertension | 0.07 (.004 to .14) | .037 | 0.08 (.01 to .14) | .028 |
| Maternal anemia | 0.01 (−.06 to .08) | .741 | … | |
| Fever from infection during pregnancy | 0.05 (−.03 to .13) | .230 | … | |
Abbreviation: CI, confidence interval.
aFor adjusted coefficients from the final multivariate risk factor model.