A Secular Trend in Age at Menarche in Sendai City and Its Surroundings
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概要
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A secular trend in age at menarche was examined for 1, 333 women living in Sendai city and its surroundings by applying the birth-year cohort analysis and the cross-sectional probit analysis. The trend toward younger menarcheal ages was consistently observed by both analyses, and it started off soon after the second World War. The speed was 0.11 year/year for the observation period of 1946 to 1966.
- 東北ジャーナル刊行会の論文
東北ジャーナル刊行会 | 論文
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