Investigation on etiology of students in special education schools

  Objective   To investig ate the etiological factors of students with mental retardation in Tianjin, and tofind out preventive measures.

  Methods   All of the 4.9 students parents in the especialeducation schools of Tianjin were investigated.Parents completed the questionnaire about the reasons and influencing factors of mental retar dation.

  Results   The first five rank diseases were relation tomental retardation.They were cerebrum diseases, apnoea neonatorum, Downs syndrome, autism, congenital deformity, 39% of students were unkown etiology.The influencing factors had the first time of finding mental retardation, the age of the preg nant motherand birth injury.

  Conclusion   The fundamental way to decrease the occurrence of MR was the high level of diagnosis, medical treatment and effectual prevention.