Secular trend of menarcheal age in southern Chinese girls.
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.
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Department of Children's Dentistry and Orthodontics, University of Hong Kong, Faculty of Dentistry.
Yen
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PK
D000367:Age Factors; D044466:Asian People; D002648:Child; D002681:China / Q000208:ethnology; D005260:Female; D006723:Hong Kong; D006801:Humans; D008572:Menarche / Q000208:ethnology