Blood lead concentrations and attention deficit hyperactivity disorder in Korean children: a hospital-based case control study

Table 4 Associations between blood lead concentration and the scores of the ADHD-rating scale and continuous performance test within ADHD cases

Variables	Unadjusted B (SE)	p-value	Adjusted B (SE)^a	p-value
ADHD-Rating Scale
Inattention	0.66 (0.62)	0.30	0.69 (0.75)	0.36
Hyperactivity/impulsivity	0.94 (0.52)	0.07	1.04 (0.60)	0.87
Total	1.60 (1.08)	0.14	1.74 (1.29)	0.18
Continuous Performance Test
Omission errors	0.86 (2.03)	0.67	0.05 (2.29)	0.99
Commission errors	-0.47 (1.79)	0.79	-0.72 (2.08)	0.72
Response time	2.71 (1.36)	0.04	2.48 (1.60)	0.12
Response time variability	2.18 (1.81)	0.24	2.26 (2.23)	0.31

B regression coefficient, SE standard error
^aAdjusted for sex, age, gestational age, birth weight, economic status, parental education, and parents’ smoking behavior

ISSN: 1471-2431