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在铜陵市区范围内查出224名智力低下患者,其中儿童88人。病因均以生物医学为主。经分析比较可见感染中毒而引起的智低在0～14岁组中明显下降。71名已明确病因的智低儿童病因作用时间及各因素的分布:出生前因素约占1/2(49.3％),其中以染色体异常占首位(25.4％);产时因素占12.7％;出生后因素占38.0％,其中社会心理因素占11.3％。
In the downtown area of Tongling, 224 people with mental retardation were found, of whom 88 were children. The causes are biomedical. The analysis shows that the poisoning caused by low intelligence in the 0 to 14-year-old group decreased significantly. The distribution of the etiological effects and the distribution of various factors in 71 children with a definite etiology: prenatal factors accounted for about 1/2 (49.3%), chromosomal abnormalities accounted for the top (25.4%), the labor factors accounted for 12.7%, and those born After the factor accounted for 38.0%, of which 11.3% of social and psychological factors.