Folic acid supplementation (total mg) purchased by mothers for the 12-month period to birth of child, for those with at least one purchase of FA and excluding outliers (p<0.001)
| Parity | n | Median (IQR) | Ajdusted mean* (SD) |
| Nulliparous | 199 664 | 120 (48–240) | 251 (9) |
| 1 | 149 197 | 90 (39–202) | 195 (9) |
| 2 | 70 499 | 84 (36–182) | 132 (7) |
| ≥3 | 45 749 | 75 (36–165) | 117 (6) |
*Adjusted for age of mother at birth of the child, socioeconomic status and year of birth of the child after log transformation of original values.
FA, folic acid.