Table 6.
Micronutrient | Tolerable upper intake level | First trimester (n = 136) | Second trimester (n = 575) | Third trimester (n = 516) | P * |
---|---|---|---|---|---|
% | % | % | |||
Folic acid | 1000 μg | 22 | 26 | 21 | 0.234 |
Vitamin D | 4000 IU | 1a | 0.2b | 1a | 0.026 † |
Calcium | 3000 mg | 0.0 | 0.0 | 0.0 | NS |
Iron | 45 mg | 4a | 9a | 19b | <0.001 † |
APrON, Alberta Pregnancy Outcomes and Nutrition; NS, not significant. *P value for Chi‐square statistic. †Values within a row with different superscripts are significantly different.