Blood Lead Levels and Associated Sociodemographic Factors among Children Aged 3 to 14 Years Living near Zinc and Lead Mines in Two Provinces in Vietnam

Table 3

Differences in blood lead levels (μg/dL) by gender and age groups.

		Ban Thi, Bac Kan			Tan Long, Thai Nguyen
				95% CI			95% CI
Age group (years)	<6	45		14.87-18.92	55		9.93-15.94
	6-10	113		14.09-16.52	97		11.03-15.57
	11-14	37		12.05-15.77	56		10.98-17.58
value			0.08			0.78
Gender	Boys	110		15.32-17.59	123		11.84-15.84
	Girls	85		12.59-15.52	85		10.35-15.5
value			<0.001			0.36

Kruskal-Wallis test. Mann–Whitney test.