Table S1.
Demographic, anthropometric, and diet-related parameters and iron status in three categories of infants according to the quartile values of whole blood mercury content.
| Characteristics | Whole Blood Mercury Level (µg/L) | p Value a | ||
|---|---|---|---|---|
| ≤0.63 (n = 27) | >0.63 and <1.28 (n = 55) | ≥1.28 (n = 27) | ||
| Age, months b | 10.8 (9.8, 11.7) | 11.5 (10.7, 12.5) | 11.5 (10.9, 12.1) | 0.014 c |
| Gender | ||||
| Male | 15 | 25 | 16 | 0.786 |
| Female | 12 | 30 | 11 | |
| Gestational age, weeks b | 39 (37.6, 40) | 39 (38, 40) | 40 (38.4, 40.4) | 0.049 c |
| <37 weeks | 4 | 1 | 1 | 0.075 |
| Anthropometry, Z-score d | ||||
| birth weight, kg | 3.26 (2.89, 3.48) | 3.20 (2.98, 3.41) | 3.21 (3.04, 3.56) | 0.750 e |
| birth weight < 2.5kg, n | 2 | 3 | 0 | 0.195 |
| birth weight | 0.07 (−0.96, 0.41) | −0.30 (−0.64, 0.28) | −0.07 (−0.53, 0.49) | 0.738 e |
| weight for age | 0.93 (−0.06, 1.29) | 0.58 (0.12, 0.97) | 0.42 (−0.06. 0.93) | 0.184 e |
| WAZ - BWZ | 1.21 (0.12, 1.79) | 0.87 (0.07, 1.51) | 0.55 (−0.09, 0.86) | 0.080 e |
| Dominant feeding method, n | ||||
| mostly breast-fed | 5 | 24 | 16 | 0.022 |
| mixed-fed | 7 | 12 | 2 | |
| mostly formula-fed | 12 | 13 | 7 | |
| others | 3 | 6 | 2 | |
| Duration of mostly breastfeeding, months b | 1.5 (0–6) | 6.0 (0–11.7) | 10.7 (0–11.7) | 0.009 c |
| Fish intake, n | ||||
| presence | 16 | 30 | 13 | 0.415 |
| absence | 11 | 25 | 14 | |
| Duration of fish intake, months b | 0 (0–1) | 0 (0–2) | 2.0 (0–3) | 0.078 c |
| Iron status, n | ||||
| Iron deficiency | 2 | 12 | 6 | 0.162 |
| Non-iron-deficiency | 25 | 43 | 21 | |
| Iron deficiency anemia | 2 | 6 | 3 | 0.685 |
a The values were calculated using the Chi-square test, unless otherwise stated; b The values are presented as the median and interquartile range; c The values were calculated using the Kruskal-Wallis test; d The values are presented as the mean and 95% confidence interval; e The values were calculated using the ANOVA.