Table 2.
Measures of maternal iron status in pregnancy
|
1st Trimester |
2nd Trimester |
|||||
|---|---|---|---|---|---|---|
| Mean (SD) | Interquartile range (25−75%ile) | Mean (SD) | Interquartile range (25−75%ile) | |||
| Iron intake (mg/day) | n = 1098 | n = 1034 | ||||
| Total | 34.4 (17.2) | 23.7−41.5 | 50.4 (25.2) | 38.5−53.9 | ||
| From food only | 17.6 (8.3) | 12.1−20.9 | 18.1 (8.5) | 12.7−21.1 | ||
| From supplements only | 16.8 (14.9) | 7.2−23.2 | 32.3 (23.5) | 28.9−28.9 | ||
| n = 1047 | n = 994 | |||||
| Haemoglobin (g/dl) | 12.7 (0.9) | 12.1−13.2 | 11.6 (0.8) | 11.1−12.2 | ||
| Mean cell volume (fl) | 89.4 (4.8) | 87.2−92.2 | 91.3 (5.1) | 88.8−94.5 | ||
| Number (%) | Number (%) | |||||
| Anaemica | 28 (2.7) | 86 (8.6) | ||||
| Microcytic (mean cell volume <85) | 122 (11.7) | 81 (8.2) | ||||
| Microcytic anaemia | 16 (1.7) | 27 (2.7) | ||||
| Low iron intake (<27 mg/day) | 364 (33.2) | 112 (10.8) | ||||
a
Anaemia in pregnancy is defined according to criteria published by the Centers for Disease Control and Prevention26 as haemoglobin level <11 g/dl in the first trimester and <10.5 g/dl in the second trimester.