Blood lead levels of contemporary Japanese children

Table 1 Average lead concentrations in blood samples from 3 regions

	N	Age (years)**	Blood Pb concentration (GM, μg/dL)**
Tokyo	131	6.2 ± 3.8^a	0.940 (1.42)^#
Osaka	34	4.8 ± 3.6	1.24 (1.41)
Shizuoka	187	7.3 ± 3.6^a,#	1.15 (1.56)
Total	352	6.6 ± 3.8	1.07 (1.51)

^aAge of two subjects was missing for Tokyo and Shizuoka
** Variation in age and blood Pb concentrations due to the regions was significant (ANOVA, p < 0.01 and < 0.001, respectively)
^# Significantly different from the other two regions (Scheffé’s multiple-comparison procedure)

ISSN: 1347-4715