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1988年我们抽样调查了16个乡镇1179名女性月经初潮年龄,分析初潮年龄变化的情况,其结果如下: 一、调查方法和对象: 采用回顾性调查方法,按设计表直接询问填写,包括月经初潮年龄、生育等情况,查16个乡镇、1179人,年龄16—45周岁,平均年龄25.0岁,调查率为97.6％(回忆不清除去),本调查资料呈正态分布,用平均数法计算。
In 1988, we sampled and surveyed 1179 women’s age of menarche in 16 towns and townships and analyzed the changes of menarche age. The results are as follows: 1. Methods and objects of investigation: The method of retrospective survey was used to fill in the questionnaire directly, including the menarche Age, fertility and other circumstances, check the 16 towns and 1179 people, aged 16-45 years old, with an average age of 25.0 years old, the survey rate was 97.6% (recall unclear), the survey data were normal distribution, using the average method .