XXXX : a population-based case-control study.

@entity43 @entity1 @entity390 @entity167 @entity5
We attempted to identify all cases of @entity43 which occurred in two health districts in the UK during a 56 month period. The crude incidence was 8.9 cases/100,000 @entity1 . One hundred and twenty cases and 119 age-matched controls were interviewed to identify risk factors for this disease. In addition, 137 mothers completed postal questionnaires. Cases were older at leaving school, had higher social class occupations, were more often unmarried or married late, and had fewer @entity1 than controls. Oral contraceptive use was similar for both. Cases reported more exercise at all ages, and more alcohol consumption 1 year before diagnosis. Cases' mothers reported slightly less @entity390 during pregnancy than controls' mothers, and none of the mothers reported exogenous hormone exposure during the index pregnancy. In this study benign @entity43 strongly resemble @entity5 in their age distribution in the population. They also resemble @entity5 in their association with educational status and marital status. There was, however, no similarity regarding prenatal hormone exposure. The increased risks associated with exercise and @entity167 use were unexpected; we need further information about how these exposures affect the ovary, and whether they affect the testis.
