Methods Data were from the investigation of Chinese students' physical constitution and health status in 1991 and in 2000. The statistical and comparative analysis was performed.
方法利用1991与2000年中国学生体质与健康调研的结果进行统计检验和比较分析。
Methods Data were from the investigation of Chinese students' physical constitution and health status in 1991 and in 2000. The statistical and comparative analysis was performed.
方法利用1991与2000年中国学生体质与健康调研的结果进行统计检验和比较分析。
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