Median (IQ25–IQ75) of serum zinc concentration (μmol/L) | P value* | |
Small for gestational age | ||
Yes (n=18) | 3.3 (1.7–4.3) | 0.011 |
No (n=65) | 4.9 (3.0–7.6) | |
Treatment with recombinant human erythropoietin | ||
Yes (n=30) | 3.8 (2.1–4.9) | 0.020 |
No (n=53) | 5 (3.0–7.7) | |
Bronchopulmonary dysplasia | ||
Yes (n=16) | 2.7 (1.8–4.3) | 0.005 |
No (n=67) | 4.9 (3.0–7.7) | |
Congenital or nosocomial infection | ||
Yes (n=22) | 4.3 (2.1–6.4) | 0.37 |
No (n=61) | 4.4 (2.8–7.0) | |
Metabolic bone disease | ||
Yes (n=6) | 3.9 (2.4–5.1) | 0.36 |
No (n=77) | 4.4 (2.7–7.0) | |
Gender | ||
Male (n=39) | 4.4 (2.8–7.6) | 0.33 |
Female (n=44) | 4.2 (2.2–6.4) | |
Birth before 32 weeks of gestation | ||
Yes (n=43) | 4.2 (2.2–5.6) | 0.13 |
No (n=40) | 4.9 (3.0–7.7) |
*Mann-Whitney U test.