in order to determine the exact birth rate and also percent of birth - orders in all births in the province of west azerbaijan, all centres of birth registration in the province were asked to fill a questionnaire at the time of issuing identity document for children. in the questionnaire, parents were asked to mention the place of birth, sex and birth order of the children and also the occupati...

in an attempt to investigate the relationship of birth rank and family size with the incidence of neurosis in an iranian culture, case notes of 1029 schizophrenic patients as (497 males and 532 females) referred to psychiatric clinic for insured workers were studied. the incidence of neurasis appeared to be significantly more frequent among the first-half position of birth  rders in the familie...

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it is not clear whether sibling's gender ratio is associated with attention deficit hyperactivity disorder (adhd). this study examines whether inattentiveness severity and hyperactivity/impulsivity severity are associated with birth order of children with adhd.participants are a clinical sample of 173 children and adolescents with adhd and 43 ones without adhd. diagnoses were made using diagnos...