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Title
Relative weight and race influence average age at menarche: results from two nationally representative surveys of US girls studied 25 years apart.
Authors
Anderson, Sarah E; Dallal, Gerard E; Must, Aviva
Abstract
1) To establish with nationally representative US data whether menarche occurred earlier in the 1990s than it had 25 years before. 2) To assess whether the occurrence of menarche in relation to weight status and race had changed over this time period.