中国11～15岁青春期男生遗精发生与身体形态发育的关系

Association between physical development and spermatorrhea during puberty among boys aged 11 to 15 years in China

目的调查中国11～15岁青春期男生遗精与身体形态发育的关系。方法从2010年全国学生体质与健康调查数据中选取11—15岁男生的身高、体重、胸围、腰围、臀围等体测项目和遗精情况等资料，并计算BMI和腰围身高比。按同年龄（相差±0．1岁）l：1随机匹配已遗精和未遗精男生，最终获得已遗精男生和未遗精男生各3440名，共计6880名。采用t检验分析不同年龄组中两组男生各项指标的差异；使用多水平模型分析遗精与身体形态发育的关系。结果在6880名调查对象中，11—15岁各组已遗精男生的身高分别为（150．96±8．叭）、（159．46±8．03）、（163．76±7．43）、（167．03±7．12）、（169．50±6．64）em，未遗精男生分别为（147．38±6．54）、（153．55±8．68）、（160．35±8．66）、（164．44±7．98）、（167．98±7．80）cm，差异有统计学意义（t值分别为3．70、9．96、10．76、8．26、3．21，P值均〈0．01）。多水平模型分析结果显示，11～13岁各组体重的差异最大，遗精组男生比非遗精组分别高4．20、7．23、3．93kg（Wald。值分别为13．11、70．73、72．93，P值均〈0．01）；14～15岁各组身高的差异最大，遗精组男生比非遗精组分别高2．81、1．99em（WaldX。值分别为87．80、19．54，P值均〈0．01）；遗精与未遗精男生各项指标的差异（p值）均随年龄呈抛物线变化，12岁组男生体重、BMI、身高、胸围、腰围、臀围、腰围身高比差异最大，8值分别为7．23kg、1．64kg／m2、5．55cm、4．40cm、4．63cm、4．94CITI、0．015；15岁组各项指标差异最小，B值分别为-0．39kg、-0．56kg／m2、1．99cm、-0．57cm、-1．59cm、-0．42cm、-0．015。结论中国11～15岁男生遗精发生与身体形态发育存在相关性，且随年龄呈抛物线变化趋势。

Objective To explore the association between spermatorrhea and physical development during puberty for boys aged 11 to 15 years old in China. Methods The height, weight, chest circumference, waist circumference, hip circumference and the station of spermatorrhea of boys aged 11 - 15 years old were selected from the data of 2010 National Survey on Students Constitution and Health. Body mass index（BMI） and waist to height ratio were calculated. After 1：1 random matching in every 0. 1 year of age, 6880 boys（3440 with spcrmatorrhea and 3440 without spermatorrhea） were included in our study, t-test was used to analyze differences in anthropometry measurements between boys with spermatorrhea and boys without spermatorrhea in each age group. Multilevel model was used to analyze the relationship between anthropometry measurements and spermatorrhea. Results A total of 6880 boys were put in this research. Heights of boys with spermatorrhea aged 11 to 15 years old were （ 150. 96 -＋ 8.01 ）, （ 159.46 -＋ 8.03 ）, （ 163.76 -＋ 7. 43 ） , （ 167.03 -＋ 7. 12） and （ 169. 50 _＋ 6. 64） em, respectively, while heights of boys without spermatorrheaaged 11 to 15 were （147.38 ＋6.54）, （153.55_＋8.68）, （160.35 -＋8.66）, （164.44_＋ 7.98） and （ 167.98 ＋7.80） em, respectively. The differences were significant （t values were 3.70, 9.96, 10. 76, 8.26, and 3.21 respectively with all P values 〈 0. 01 ）. Results of multilevel analysis showed that the differences of weight were the largest from 11 to 13 years old, boys with spermatorrhea having a 4. 20,7.23 and 3.93 kg （ Waldx2 values were 13. 11 , 70. 73 and 72. 93 respectively, all P values 〈 0. 01 ） larger weight than boys without spermatorrhea, respectively. Differences of height were the largest from 14 to 15 years old, boys with spermaturrhea having a 2.81 and 1.99 cm （Waldx2 values were 87.80 and 19.54, P 〈0. O1 ） larger height lhan boys without spermatorrhea. The trends of the differences between boys with spermatorrhea and boys without spermatorrhea （13 value） with age were parabolic on weight, BMI, height, chest circumference, waist circumference, hip circumference and waist to height ratio. The [3 values reached maximum at 12 years old, whieh were 7.23 kg, 1.64 kg/m： , 5.55 era, 4. 40 cm, 4. 63 crn, 4. 94 era, and 0.015, respectively. The 13 values reached minimum at 15 years old, which were -0. 39 kg, -0. 56 kg/m2, 1.99 cm, - 0. 57 cm, - 1.59 cm, - 0. 4-2 cm and - 0. 015, respectively. Conclusion There is an association between spermatorrhea and physical development among boys aged 11 to 15 years in China ,which has a parabolic trend with age.