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Table 1 Frequency distribution of demographic information of children under study

From: Blood lead concentration and its associated factors in preschool children in eastern Iran: a cross-sectional study

Variable Mean ± SD/frequency (percentage)
Age (month) 52.37 ± 23.78
Body mass index (kg/m2) 15.52 ± 4.13
Gender
 Boy 200 (50%)
 Girl 200 (50%)
BLC 2.49 ± 2.64 (range: 0.5–29.40 μg/dL)
< 2.5 μg/dL 273 (68.3%)
2.5–5 μg/dL 95 (23.7%)
5–7.5 μg/dL 17 (4.2%)
7.5–10 μg/dL 6 (1.5%)
> 10 μg/dL 9 (2.3%)