Characteristics | N | Mean (SD, 95% CI) | Median (min. max) | P-value | % children with BLL ≥5 μg/dL | |
---|---|---|---|---|---|---|
Total | 338 | 3.85 (2.58, 3.6 4.16) | 3.6 (<LOD,17.2)a | 27.8 (94) | ||
Gender | Boys | 165 | 4.47 (2.99, 4.02 4.94) | 4.1 (<LOD, 17.2) | 0.001 | 35.7 (60) |
Girls | 173 | 3.25 (1.94, 2.98 3.63) | 3.3 (<LOD, 13.8) | 20.0 (34) | ||
Age(years) | 4 | 93 | 3.73 (2.61, 3.22 4.29) | 3.3 (<LOD, 17.2) | 0.725 | 25.8 (24) |
5 | 84 | 3.96 (2.39, 3.49 4.68) | 3.8 (<LOD, 16.4) | 28.6 (24) | ||
6 | 72 | 4.03 (2.92, 3.34 4.71) | 3.5 (<LOD,14.5) | 27.8 (20) | ||
7 | 89 | 3.71 (2.43, 3.19 4.22) | 3.3 (<LOD,13.8) | 29.2 (26) | ||
City | Darkhan | 167 | 3.41 (2.15, 3.12 3.84) | 3.3 (<LOD, 13.8) | 0.032 | 22.2 (37) |
Erdenet | 171 | 4.27 (2.88, 3.84 4.71) | 3.8 (<LOD,17.2) | 33.3 (57) | ||
House type | Apartment | 121 | 3.23 (2.36) | 1.65 (<LOD,17.2) | 0.0008 | 19.5 (23) |
Ger (tent) | 217 | 4.18 (2.76) | 3.9 (<LOD,16.4) | 32.3 (71) | ||
Parental education level | Primary | 11 | 6.14 (2.44, 4.5 7.78) | 5.7 (<LOD, 11.8) | < 0.0001 | 18.2 (2) |
Middle school | 59 | 4.92 (3.72, 3.95 5.89) | 4.0 (<LOD, 16.4) | 36.2 (21) | ||
High school | 106 | 3.97 (2.46, 3.50 4.45) | 3.7 (<LOD, 13.8) | 27.4 (29) | ||
College | 30 | 3.5 (1.77, 2.83 4.16) | 3.4 (<LOD, 7.0) | 30.0 (9) | ||
Bachelor degree | 129 | 3.24 (2.18, 2.86 3.62) | 1.65 (<LOD,17.2) | 20.0 (26) | ||
Parents have a paying job | Yes | 159 | 3.38 (2.12, 3.05 3.72) | 3.3 (<LOD, 17.2) | 0.0004 | 22.6 (36) |
No | 174 | 4.40 (2.66, 3.95 4.85) | 4.0 (16.4) | 33.3 (58) |