中国11～18岁汉族男生首次遗精年龄的地域分布及10年变化分析

目的 分析我国11～18岁汉族男生首次遗精年龄的地域分布及10年变化情况.方法 利用2005年和1995年全国学生体质健康调研数据中11～18岁汉族男生数据进行分析,2005年有效调查人数为69 320名,1995年有效人数为68 992名,按行政区划将全国汉族男生划分为华北、东北、华东、中南、西南、西北6个地区,用概率单位回归法计算首次遗精平均年龄.结果 2005年城市男生首次遗精平均年龄为13.98岁,乡村男生首次遗精平均年龄为14.22岁.西南地区男生首次遗精平均年龄最早,城、乡男生分别为13.57岁、13.72岁;西北地区城市男生首次遗精平均年龄较晚,为14.18岁;中南地区乡村男生首次遗精平均年龄最晚,为14.39岁.首次遗精年龄最早的前5个省级单位分别是重庆(13.28岁)、贵州(13.47岁)、海南(13.47岁)、四川(13.56岁)和天津(13.61岁);最晚的5个省级单位分别是湖北(15.30岁)、青海(15.13岁)、辽宁(14.75岁)、广西(14.68岁)和上海(14.55岁).1995年城市男生首次遗精平均年龄为14.43岁,乡村男生首次遗精平均年龄为14.77岁,2005年城、乡男生首次遗精平均年龄分别比1995年提前约0.45岁和0.55岁.结论 我国11～18岁汉族男生首次遗精平均年龄城市早于乡村,各地区间男生首次遗精平均年龄差异明显,西南地区最早,西北、中南地区较晚.男生首次遗精年龄有提前倾向,乡村较城市更明显.

Study of geographic distribution and 10 years' change of spermarche in Chinese boys of Han-group aged 11 to 18

Objective To analyze the geographic distribution and 10 years'change of spermarche in Chinese boys of Hangreup aged 11-18.Methods Calculate the average age of spermarche of Chinese boys who narticipated in National Physical Fitness and Health Surveillance in 2005 and 1995.The sample size ofboys was 69 320 in 2005.68 992 in 1995 National Physical Fitness and Health Surveillance,respectively.The geographic distribution of Chinese boys were categorized into 6 areas as north,northeast,east,south central,southwest and northwest by administrative divisions.Results The average ages at spermarehe were 13.98and 14.22 years old for urban and rural boys in 2005,respectively.The average ages at spermarehe were 13.57 and 13.72 years old for urban and rural boys who living in southwest of China. And the average ages at spermarche were 14.18 and 14.39 years old for urban boys who lived in northwest of China,and rural boys who lived in south central of China,respectively.The average age of spermarche of the top 5 provinces were Chongqing(13.28),Guizhou(13.47),Hainan(13.47),Sichuan(13.56)and Tianjin(13.61);and the last 5 provinces were Hubei(15.30),Qinghai(15.13),Liaoning(14.75),Guangxi(14.68)and Shanghai (14.55).The average ages of spermarche were 14.43 and 14.77 years old for urban and rural boys in 1995,respectively.and thus the ages of spermarche in 2005 were 0.45 and 0.55 years earlier than that of urban and rural boys in 1995.Conclusion There was a large variation among different geographic areas.The onset of spermarche was generally earlier in urban than in rural boys.the earliest in southwest of China,and the latest in northwest and south central of China.Significant decline trend of age at spermrche could be found in Chinese boys.especially in rural areas.