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我们于1986年10月在三明市第四中学和崇和小学校随机抽取8～17岁年龄组男女生各50名,共948名学生进行一天两次身高测量。上午在7时30分至8时,下午在4时30分至5时由校医亲自测量,固定地点、器械、统一方法, 结果与分析1.年龄组间的差异;各年龄组在一天中身高均有变化。下午比上午下降0.72～1.67厘米,(t=9.59～14.04,p<0.01)变化量大的年龄组女生为11岁(平均下降1.46厘米),男生为12岁(平均下降1.67厘米)。这与青少儿生
In October 1986, we randomly selected 50 boys and girls aged 8-17 in Sanming No.4 Middle School and Chonghe Primary School respectively. A total of 948 students took height measurements twice a day. AM 7.30 to 8.00 AM, PM 4.30 PM to 5.00 PM by the school physician for personal measurements, fixed locations, instruments, uniform methods, results and analysis 1. Differences between age groups; height for each age group in one day Both have changed. (T = 9.59-14.04, p <0.01). The average age of girls in the age group was 11 years (average 1.46 centimeters) and that of boys 12 years (an average of 1.67 centimeters) in the afternoon. This is with adolescents