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Psychomotor and mental development during infancy. Relation to psychosocial conditions and health. Part IV of a longitudinal study of children in a new Stockholm suburb.

This article presents the fourth substudy in a Swedish research project of a birth cohort of children in a newly-built Stockholm suburb. The aims are to follow and to describe their mental development by prospective methods. Here we present the results of the one-year follow-up. The children's mental development, measured with the Griffiths' Development Scales, and their behaviour in the test situation and during the home visit are described. These results are related to various psychosocial background factors (such as the parents' ages, number of siblings, form of custody), home environment factors (the parents' mental disease, addictions and criminality) and the children's physical health and development. Children with deviant behaviour during the home visits are described separately. Of 640 women who paid their first visit to the maternal welfare centers in a new Stockholm suburb during one prospective year, 532 (85%) were interviewed with regard to 41 stress factors forming a "Life stress score" (LSS). The interviews were supplemented with data from hospital, social welfare and police records concerning the expectant mother and the father. The 532 mothers were divided into three groups according to the degree of psychosocial stress (194 without psychosocial stress, 171 with severe psychosocial stress and 167 in an intermediate group). The pregnancies and deliveries of all mothers were evaluated. The physical health and development (using information from the child welfare clinics) and the mental health and development (using information from home visits and testings) were studied during infancy in 452 children (226 boys and 226 girls)--i.e. 77% of all children born in the suburb during the year. The children were tested with the Griffiths' Development Scales and their behaviour during the test was observed on home visits by the same psychologist (L.N.) at the age of 10 months (79 boys, 73 girls) or 14 months (92 boys, 107 girls), or about the age of 18 months (55 boys, 46 girls). The test results are mainly reported by descriptive methods. In summary, the results of the evaluation of the children's mental health during the first year of life, generally showed average developmental quotients. However, 20% of the children had values below the average. Thirty-two per cent of the children with low test results (less than -1 standard deviation on the total test) came from homes with serious psychosocial stress and 29% from homes with a mild degree of psychosocial stress. Of the nine children who had generally very low scores in the Griffiths' evaluation, seven came from homes with psychosocial stress.(ABSTRACT TRUNCATED AT 400 WORDS)