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Korean J Occup Environ Med. 1997 Jun;9(2):208-216. Korean. Original Article.
Lee JY , Lee CY , Kim JS , Lee SJ , Park WS , Woo KH .
Department of Preventive medicine, School of medicine, Kyungpook National University, Korea.
Occupational nurse at Kumi, Korea.
Orion Electric Company, Korea.
Department of Preventive medicine and Public health, College of medicine, Soonchunhyang University, Korea.

To assess neurobehavioral effects of 48 low level lead-exposed workers in CRT manufacturing factory, simple and choice reaction time test with NTOS (Neurobehavioral Tests for Occupational Screening), digit symbol and digit span with K-WAIS (Korean Wechsler Adult Intelligence Scale), and SCL-90-R (Symptom Check List 90 revised) was examined. These screening test battery reflect 3 psychological domain; psychomotor, short term memory, and symptom. Average blood lead level was 17.7 microgram/dl and mean exposure duration was 5.6 years. Nobody exceeded blood lead level over 40 microgram/dl, the guideline. We divided workers to two group, shorts-term exposed group(< or = 5 years) and long-term exposed groups 5 years) for analysis. ANCOVA model of simple reaction time, hostility, phobic anxiety, somatization were statistically significant and coefficient of independent variable of exposure duration was also significant. MANCOVA model of SCL-90-R was significant, too. The results of this study were consistent with previous study; symptoms were early neurobehavioral effects of low level lead exposure. And this study showed that current blood lead level as independent variable was able to mask the early neurobehavioral effects.

Copyright © 2019. Korean Association of Medical Journal Editors.