title: Secular trend of menarcheal age in southern Chinese girls.
abstract: Southern Chinese girls aged 11 years and 9 months to 12 years and 3 months in Hong Kong have a mean menarcheal age of 11.50 years (standard deviation of 0.47) using the recollection method. Highly significant differences are found when compared to the 12-year-old girls in Hong Kong studied in the past decades. Therefore, a secular trend of earlier menarcheal age is demonstrated.
authors.affiliation: Department of Children's Dentistry and Orthodontics, University of Hong Kong, Faculty of Dentistry.
authors.forename: L L
authors.initials: LL
authors.lastname: So
authors.forename: P K
authors.initials: PK
authors.lastname: Yen
mesh_terms: D000367:Age Factors; D044466:Asian People; D002648:Child; D002681:China / Q000208:ethnology; D005260:Female; D006723:Hong Kong; D006801:Humans; D008572:Menarche / Q000208:ethnology