Table 3.
Odds ration (95% CI) of LBW by joint effects of folic acid supplement and dietary folate intake.
| Dietary folate intake levels (μg/day) | Folic acid supplementation non-users | Folic acid supplementation users | P for interaction | ||
|---|---|---|---|---|---|
| case/controls | ORd (95% CI) | case/controls | ORd (95% CI) | ||
| Q1 <143.24 | 98/585 | 1.00 | 124/1480 | 0.82 (0.59~1.15) | 0.223 |
| Q2 143.24–188.55 | 42/347 | 0.95 (0.76~1.18) | 103/1822 | 0.91 (0.80~1.03) | |
| Q3 188.55–254.37 | 48/386 | 0.94 (0.83~1.06) | 100/1779 | 0.91 (0.84~0.98) | |
| Q4 ≥254.37 | 51/541 | 0.97 (0.87~1.09) | 84/1641 | 0.96 (0.88~1.04) | |
ORd
Adjusted for maternal age, education level, monthly income per capita, smoking, employment, weight gain during pregnancy, preeclampsia, parity, cesarean section, and total energy intake.