Table 3.
Performance on non-computerized neurobehavioral tests amongst the three groups
a
Bonferroni post-hoc test concludes statistically significant difference between mean of working exposed group and working nonexposed and between working exposed group and school children at p<0.003 value.
b
Bonferroni post-hoc test concludes statistically significant difference between mean of school children and working children (exposed and nonexposed) at p<0.003 value.
c
Using ANOVA
d
Controlling for child's age, education, parental education, smoking, coffee drinking, substance sniffing, and head injury using ANCOVA
SD = standard deviation
WISC-R = Wechsler Intelligence Scale for Children—Revised