Sex ratio in the spondyloarthropathies and its relationship to phenotypic expression, mode of inheritance and age at onset.

Abstract excerpt

OBJECTIVE: To investigate the interrelated effect of phenotypic expression [i.e., primary ankylosing spondylitis (1 degree AS) or disease secondary to psoriasis (Ps) AS or inflammatory bowel disease (IBD)AS], age at onset, sex and inheritance of responsible genes in AS. METHODS: Three studies were performed to evaluate 1949 subjects with AS. Subgroups of the patients were formed for each study depending on...

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