According to WHO project "Brain Damage in Utero" in the framework of the screening phase of the programme, 1025 children (725 in experimental group-Novozybkov and Klintsy towns of Bryansk region; 300 in control group--Obninsk town of Kaluga region) and 600 parents (300 in experimental group and 300 in control group) were studied using standardized methods of psychological psychiatric assessment (Draw-a-man test, British picture vocabulary test, Raven coloured matrices, Parental and teacher Rutter Scales, CHQ-28, Verbal subtest of Wechsler test) for potential psychological and psychiatric effects of Chernobyl accident on child's intelligence, behavioural and emotional state, mental health of parents and parental intellectual level. The following results were obtained: comparison of verbal IQ scores in children revealed a 6-fold increase of these values in experiment group. Comparison of nonverbal IQ scores in children revealed that these values are 4 times higher in experimental group. Comparison of scores according to Rutter parental and teacher scales revealed that emotional and behavioural disorders are 1.5 times more prevalent in children of experimental group. All the above differences were statistically significant. Comparison of CHQ-28 scores was indicative of relative prevalence of these values in parents of experimental group, but there was no statistically significant difference between such score in experimental and control groups. Comparison of scores of parental IQ showed relative prevalence of these values in experimental group. The results obtained can not be completely estimated without thorough identification of individual doses received by mothers and their children. Only after obtaining these data it will be possible to solve the problem of dose effect.
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