Table 3 Serum ferritin concentration by gravidity.
From: Maternal iron deficiency assessed by serum ferritin and birth outcomes in mainland China
Total (n = 1688) | P-value | ||
|---|---|---|---|
Primigravida (n = 776) | Multigravida (n = 912) | ||
Age (years) | 27 ± 3 | 30 ± 4 | < 0.001 |
Average length of pregnancy (gestational age at birth) (weeks) | 39 ± 2 | 39 ± 2 | 0.990 |
2nd trimester of pregnancy1 | |||
Serum ferritin concentration (ng/mL) | 62.3 ± 49.9 | 57.7 ± 53.9 | 0.109 |
Prevalence of iron deficiency using serum ferritin < 15 ng/mL cut-off, n (%) | 71/647 (11.0) | 89/702 (12.7) | 0.333 |
3rd trimester of pregnancy2 | |||
Serum ferritin concentration (ng/mL) | 22.6 ± 13.9 | 22.0 ± 14.3 | 0.460 |
Prevalence of iron deficiency using serum ferritin < 15 ng/mL cut-off, n (%) | 176/497 (35.4) | 251/646 (38.9) | 0.233 |
Neonatal weight (g) | 3317 ± 478 | 3359 ± 448 | 0.062 |
Prevalence of LBW, n (%) | 34 (4.4) | 26 (2.9) | 0.091 |
Prevalence of LGA, n (%) | 41 (5.3) | 59 (6.5) | 0.304 |
Neonatal APGAR score | 9.99 ± 0.14 | 9.99 ± 0.12 | 0.830 |
Prevalence of neonatal 10-min APGAR score < 5, n (%) | 0 (0.0) | 0 (0.0) | n.d. |
