Risk of Becoming Schizophrenic: Birth Order and HLA Profile |
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Authors: | Bisu Singh Nirmal Kumar Bera Tapas Kumar Chaudhuri |
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Institution: | 1. Cellular Immunology Laboratory, Department of Zoology, University of North Bengal, Rajarammohanpur, Siliguri, 734013, West Bengal, India 2. Department of Psychiatry, North Bengal Medical College and Hospital, Siliguri, West Bengal, India
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Abstract: | The present study was carried out to ascertain the birth order as a risk factor for schizophrenia on the basis of HLA genetics. India born schizophrenic patients of Siliguri, West Bengal who attended Outpatient Department of Psychiatry, North Bengal Medical College and Hospital were included in the study. After longitudinal follow up of 136 patients and 150 controls matched in age, sex and ethnicity were screened for the study. The typing of HLA was done by PCR-SSP method. The results showed a significantly increased frequency of HLA*A3 among the patients. Further, birth order was studied among HLA*A3 positive 108 patients and 41 controls. Although, results indicated higher incidence of schizophrenia among second children irrespective of sex but it was not found to be statistically significant. However, when the birth order of male and female patients was analyzed separately, a significant decreased incidence of schizophrenia was observed among the third female child. The findings do not corroborate with the earlier findings of association of birth order with schizophrenia. |
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