Table 5.
Results of multiple linear regression analyses of variables related to the duration of intake.
| Dependent variable: intake duration | (1) | (2) | (3) | |||
|---|---|---|---|---|---|---|
| Coefficient (95% CI) | P -value | Coefficient (95% CI) | P -value | Coefficient (95% CI) | P -value | |
| Knowledge | ||||||
| Overall knowledge of health and nutrition (standardized score) | 9.278 (2.966–15.591) | 0.004 | ||||
| Overall knowledge of nutrition (standardized score) | 5.050 (0.842–9.258) | 0.019 | ||||
| Overall knowledge of health (standardized score) | 5.362 (0.465–10.259) | 0.032 | ||||
| Knew correct time to take folic acid (1 = yes) | 1.375 (−13.428–16.177) | 0.855 | 2.074 (−13.046–17.194) | 0.788 | 7.392 (−6.451–21.235) | 0.295 |
| Awareness of folic acid policy (1 = yes) | 16.451 (4.555–28.347) | 0.007 | 16.641 (4.726–28.555) | 0.006 | 16.700 (4.779–28.621) | 0.006 |
| Characteristics of respondents | ||||||
| Age (< 28 as reference) | 1.414 (−9.990–12.818) | 0.808 | 1.708 (−9.711–13.127) | 0.769 | 1.652 (−9.777–13.081) | 0.777 |
| Years of education (≤ 9 years as reference) | −2.893 (−14.827–9.041) | 0.634 | −1.443 (−13.279–10.394) | 0.811 | −0.355 (−12.036–11.326) | 0.952 |
| Employment status (1 = employed) | 8.606 (−3.619–20.832) | 0.167 | 8.900 (−3.343–21.142) | 0.154 | 9.024 (−3.223–21.271) | 0.148 |
| Pregnancy order (1 = first) | 31.975 (19.856–44.095) | <0.001 | 32.402 (20.267–44.536) | <0.001 | 32.047 (19.895–44.199) | <0.001 |
| Pregnancy intention (1 = intended) | 29.273 (18.256–40.291) | <0.001 | 29.066 (18.032–40.101) | <0.001 | 29.167 (18.124–40.210) | <0.001 |
| BMI (BMI < 25 as reference) | ||||||
| 25 ≤ BMI < 30 | 14.182 (2.788–25.576) | 0.015 | 14.697 (3.275–26.119) | 0.012 | 13.640 (2.208–25.072) | 0.019 |
| BMI ≥ 30 | 24.348 (7.459–41.237) | 0.005 | 24.115 (7.198–41.032) | 0.005 | 23.935 (7.011–40.858) | 0.006 |
| Self-reported health status (1 = excellent) | −5.282 (−16.952–6.389) | 0.375 | −4.549 (−16.244–7.146) | 0.445 | −5.834 (−17.555–5.887) | 0.329 |
| Living together with husband (1 = yes) | −12.599 (−23.799–1.400) | 0.028 | −12.502 (-23.721–−1.283) | 0.029 | −12.659 (−23.886–1.433) | 0.027 |
| Family asset in lowest 25% (1 = yes) | −6.768 (−19.480–5.943) | 0.296 | −7.843 (−20.520–4.833) | 0.225 | −7.527 (−20.251–5.198) | 0.246 |
| Officially registered as poverty-stricken household (1 = yes) | −5.015 (−20.185–10.155) | 0.517 | −5.247 (−20.441–9.947) | 0.498 | −5.356 (−20.557–9.846) | 0.489 |
| Region (1 = north) | 21.486 (10.792–32.181) | <0.001 | 22.107 (11.369–32.844) | <0.001 | 20.616 (9.884–31.349) | <0.001 |
95% CI, 95% confidence intervals.