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The CARS has strong psychometric properties and is now available for clinical and research work in India.

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The relationship between blood lead level and neurodevelopment was assessed in a pilot cross-sectional study of 74 4-14-year-old children in Chennai, India. Mean blood lead level was 11.1 microg/dL (2.5-38.3). The Binet-Kamath IQ test and the Wide Range Assessment of Visual Motor Activity (WRAVMA) were administered to 58 children. Teachers completed the Connor's Behavioral Rating Scale. Excluding two outliers, IQ and WRAVMA composite scores were inversely related to blood lead level, with an effect size of approximately 6 points decline for a 10-microg/dL increase in blood lead. Children in the highest and lowest blood lead quartiles had mean IQs of 95.6+/-13.3 and 102.0+/-22.5, respectively. Behavior ratings were not associated with blood lead level. Lead exposure is a significant problem among Indian children, with many having blood lead levels associated with increased neurodevelopmental risk.