The prevalence and diagnosis rates of Klinefelter syndrome: an Australian comparison.
cross_sectional · Level IV
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Abstract
OBJECTIVE: To determine the prevalence and diagnosis rates of Klinefelter syndrome (KS) in Victoria, Australia, and compare these to previous international findings. DESIGN, SETTING AND PARTICIPANTS: A Victorian population-based descriptive study of all cytogenetic examinations resulting in a diagnosis of KS, including prenatal diagnoses from 1986 to 2006 and postnatal diagnoses from 1991 to 2006. MAIN OUTCOME MEASURES: Birth prevalence and diagnosis rates of KS. RESULTS: The birth prevalence of KS in Victoria is estimated to be 223 per 100,000 males (95% CI, 195-254), with about 50% of cases remaining undiagnosed. CONCLUSIONS: KS may be occurring more frequently than has been reported previously, yet many cases remain undiagnosed. Our results highlight the need for increased awareness leading to timely detection.