Abstract
OBJECTIVE: The study sought to explore, whether Obsessive Compulsive Disorder has any relation
with birth order-one.
METHOD: This a retrospective study from record of twelve hundred and eight patients who attended
psychiatric department of Isra University Hospital Hyderabad, out of which 138 were
OCD; who were compared with the rest of the population. These were also studied with reference
to gender, catchment area and family type.
RESULTS: Cases with obsessive compulsive disorder were clustered in birth order-one. Total
44% of OCD patients were found out to be birth order-one as compared to 19.40% of the rest of
the psychiatric population.
CONCLUSION: Current study supports the hypothesis that in our sample birth order-one is correlated
with Obsessive Compulsive Disorder.

Key words: Obsessive Compulsive Disorder. Birth order-one. Psychiatric, Retrospective.