Table 5.

Logistic regression analysis of blood lead levels above 10 (μg/dL) among children in Ban Thi and Tan Long Communes.

Characteristics		Ban Thi-Bac Kan		Tan Long-Thai Nguyen
		OR (95% CI)	Adjust OR (95% CI)a	OR (95% CI)	Adjust OR (95% CI)b
Gender	Boys (vs. girls)	2.34 (1.13-4.85)∗	2.44 (1.13–5.24)∗	1.18 (0.68–2.06)
Age	<6 (vs. 11-14)	2.20 (0.65-7.44)	2.16 (0.58-7.98)	0.96 (0.45–2.03)
	6-10 (vs. 11-14)	0.97 (0.39-2.38)	0.96 (0.37-2.50)	0.88 (0.45–1.70)
Ever using “thuốc cam”	Yes	0.87 (0.23–3.31)		1.15 (0.58–2.27)
Hand washing before meals	Yes	1.1 (0.42-2.9)		0.93 (0.54-1.61)
Housing type	Stilt house (vs. modern house)	1.52 (0.73–3.18)		1.25 (0.72–2.18)
Play areas	Soil (vs. brick)	2.18 (1.01-4.71)∗	2.3 (1.02-5.17)∗	0.99 (0.57-1.75)
Close proximity of house to the mine (≤2 km)	Yes	1.01 (0.36-3.26)		2.58 (1.45-4.58)∗∗	2.90 (1.54-5.44)∗∗
Drinking water source	Not treated water (vs. treated water)	1.07 (0.52-2.20)		1.39 (0.80-2.42)
Parent working at the mine	Yes (vs. no)	0.65 (0.30-1.41)		0.97 (0.45-2.11)
Mother's highest degree	Primary school or less (vs. high school/college/university)	1.94 (0.22-16.74)		0.62 (0.18-2.09)
	Middle school (vs. high school/college/university)	1.27 (0.61-2.62)		0.93 (0.53-1.64)
Father's highest degree	Primary school or less (vs. high school/college/university)	1.16 (0.23-5.80)		1.18 (0.25-5.51)
	Middle school (vs. high school/college/university)	0.90 (0.43-1.88)		0.88 (0.50-1.54)
Vanderbilt ADHD Diagnostic Parent Rating Scale	Inattentive (yes vs. no)	0.60 (0.26-1.39)		7.22 (3.22-15.82)∗∗	7.85 (3.49-17.69)∗∗
	Hyperactive-impulsive (yes vs. no)	0.64 (0.25-1.66)		1.11 (0.33-3.78)
	Conduct/oppositional defiant disorder (yes vs. no)	0.23 (0.03-1.70)	0.29 (0.03-2.33)	0.9 (0.05-14.99)
	Anxiety/depression (yes vs. no)	0.43 (0.18-1.02)	0.54 (0.21-1.38)	1.31 (0.40-4.29)

^∗ p value < 0.05. ^∗∗p value < 0.01. ^aMcFadden's pseudo R² = 0.086. ^bMcFadden's pseudo R² = 0.148.