Table 3.
Factors associated with no preconception use of folic acid supplements, multilevel multivariable backward logistic regression analysis; DELIVER multi-centre, prospective, population-based cohort study, the Netherlands, 2009 and 2010
| No preconception use of folic acid* | ||
|---|---|---|
| Characteristic | OR | 95 % CI |
| Age | ||
| ≤25 years | 2·0 | 1·7, 2·4† |
| 26–35 years | 1·0 | Ref. |
| ≥36 years | 1·2 | 1·0, 1·4 |
| Partner | ||
| Yes | 1·0 | Ref. |
| No | 2·7 | 1·6, 4·6† |
| Ethnicity | ||
| Dutch | 1·0 | Ref. |
| Other Western | 1·6 | 1·3, 2·0† |
| Non-Western | 2·0 | 1·5, 2·7† |
| Religion | ||
| None/don't want to say | 1·0 | Ref. |
| Catholic | 1·1 | 0·9, 1·3 |
| Protestant | 1·4 | 1·2, 1·7† |
| Other‡ | 1·6 | 1·2, 2·3† |
| Educational level | ||
| Low | 1·4 | 1·2, 1·7† |
| Medium | 1·2 | 1·1, 1·4† |
| High | 1·0 | Ref. |
| Employed | ||
| Yes | 1·0 | Ref. |
| No | 1·9 | 1·6, 2·3† |
| Parity | ||
| Nulliparous | 1·0 | Ref. |
| Multiparous | 1·5 | 1·4, 1·7† |
| General state of health | ||
| Excellent or (very) good | 1·0 | Ref. |
| Moderate or poor | 1·2 | 1·1, 1·5† |
| Ability to influence own health | ||
| Quite a lot or a lot | 1·0 | Ref. |
| Not at all or hardly | 1·3 | 1·1, 1·5† |
| Smoking during pregnancy | ||
| No | 1·0 | Ref. |
| Yes | 1·6 | 1·3, 2·0† |
| Alcohol use during pregnancy | ||
| No | 1·0 | Ref. |
| Yes | 1·7 | 1·4, 2·0† |
Ref., referent category.
*No preconception folic acid use compared with preconception use (n 5879, 1·6 % missing values).
†Statistically significant (P < 0·05).
‡Other religions are Humanism, Islam, Judaism, Hinduism and Buddhism.