Multivariate relative risks (95% Confidence Intervals) for late sPTB (34 to < 37 weeks) according to quartiles^a^,^b.

a Relative risks and 95% confidence intervals were estimated using binomial regression with the log link function. When the log-binomial model failed to converge, log-Poisson models were used. b Multivariate models adjusted for maternal age, marital status (yes/no), education (0–4, 5–7, 8–11, ≥ 12 years), Filmer-Pritchett wealth score less than median (yes/no), baseline gestational age, body mass index at baseline (lowest tertile vs. upper tertiles), frequency of meat consumption per week (once a week or less vs. more than once per week). c P-value for test for linear trend test calculated with median biomarker in each quartile as a continuous variable. Multivariate relative risks (95% Confidence Intervals) for late sPTB (34 to < 37 weeks) according to quartilesa,b.