Familial risk of oral clefts by morphological type and severity: population based cohort study of first degree relatives

doi:10.1136/bmj.39458.563611.ae

Article

Familial risk of oral clefts by morphological type and severity: population based cohort study of first degree relatives

4 Feb 2008

Abstract excerpt

OBJECTIVE: To estimate the relative risk of recurrence of oral cleft in first degree relatives in relation to cleft morphology. DESIGN: Population based cohort study. SETTING: Data from the medical birth registry of Norway linked with clinical data on virtually all cleft patients treated in Norway over a 35 year period. PARTICIPANTS: 2.1 million children born in Norway between 1967 and 2001, 4138 of whom were...

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