TABLE 2.
Study group characteristics and manganese intake1
| High exposure (n = 39) | Low exposure(n = 19) | |
| GA, wk | 27 (25–35)2 | 37 (35–39)3 |
| Postmenstrual age at MRI, wk | 40 (38–43) | 39 (37–43) |
| Male sex, % | 58 | 55 |
| Total time on PN before MRI, d | 48 (34–62) | 2 (0–12)3 |
| Total manganese intake from birth to MRI, μg | 853 (669–1397) | 96 (12–584)3 |
| Total manganese intake in 28 d before MRI, μg | 595 (329–746) | 96 (9–426)3 |
| Parenteral manganese from birth to MRI, μg | 415 (312–760) | 5 (0–101)3 |
| Parenteral manganese in 28 d before MRI, μg | 187 (102–407) | 0 (0–67)3 |
1
GA, gestational age; MRI, manganese resonance imaging; PN, parenteral nutrition.
2
Median; 25th–75th quartiles in parentheses (all such values).
3
Significantly different from high exposure, P < 0.05 [Wilcoxon’s rank-sum (continuous variables) and Pearson's χ-square (categorical variables) tests].