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本文对中、重度智能迟滞小儿240例进行分析:其中出生前因素占全部病例的33.33％;出生时因素占19.17%;出生后因素占28.75%;原因不明占18.75％。文中对各项因素作了详细的分析。
In this paper, 240 cases of moderately and severely retarded children were analyzed: prenatal factors accounted for 33.33% of all cases; postnatal factors accounted for 19.17%; postnatal factors 28.75%; unexplained 18.75%. The article made a detailed analysis of the various factors.