Received May 29, 1996; accepted Sept 4, 1996.
, and
From the * Epidemic Intelligence Service, Centers for Disease
Control and Prevention, Atlanta, Georgia; and the
Section of
Epidemiology, Alaska Department of Health and Social Services,
Anchorage, Alaska.
Objective. Lead poisoning is a
well-recognized public health concern for children living in the United
States. In 1992, Health Care Financing Administration (HCFA)
regulations required lead poisoning risk assessment and blood lead
testing for all Medicaid-enrolled children ages 6 months to 6 years.
This study estimated the prevalence of blood lead levels (BLLs)
10
µg/dL (
0.48 µmol/L) and the performance of risk assessment
questions among children receiving Medicaid services in Alaska.
Design. Measurement of venous BLLs in a statewide sample of children and risk assessment using a questionnaire modified from HCFA sample questions.
Setting. Eight urban areas and 25 rural villages throughout Alaska.
Patients. Nine hundred sixty-seven children enrolled in Medicaid, representing a 6% sample of 6-month- to 6-year-old Alaska children enrolled in Medicaid.
Outcome Measure(s). Determination of BLL and responses to verbal-risk assessment questions.
Results. BLLs ranged from <1 µg/dL (<0.048
µmol/L) to 21 µg/dL (1.01 µmol/L) (median, 2.0 µg/dL or 0.096 µmol/L). The geometric mean BLLs for rural and urban children were
2.2 µg/dL (0.106 µmol/L) and 1.5 µg/dL (0.072 µmol/L),
respectively. Six (0.6%) children had a BLL
10 µg/dL; only one
child had a BLL
10 µg/dL (11 µg/dL or 0.53 µmol/L) on
retesting. Children whose parents responded positively to at least one
risk factor question were more likely to have a BLL
10 µg/dL
(prevalence ratio = 3.1; 95% confidence interval = 0.4 to
26.6); the predictive value of a positive response was <1%.
Conclusions. In this population, the prevalence of lead
exposure was very low (0.6%); only one child tested (0.1%) maintained a BLL
10 µg/dL on confirmatory testing; no children were identified who needed individual medical or environmental management for lead
exposure. Universal lead screening for Medicaid-enrolled children is
not an effective use of public health resources in Alaska. Our findings
identify an example of the importance in considering local and regional
differences when formulating screening recommendations and regulations,
and continually reevaluating the usefulness of federal
regulations. lead poisoning, child health services, mass
screening, government regulations, Medicaid.