目的 了解沈阳市10~12岁健康儿童肺功能和生长发育情况并分析其相关性，为科学评价中国儿童肺功能发育提供科学依据。方法 整群抽取沈阳某小学5、6年级231名健康学生作为研究对象，测量最大呼气流速(peak expiratory flow，PEF)、第一秒用力肺活量(forced expiratory volume in one second，FEV1)和身体生长发育指标，探讨这些因素对PEF、FEV1的影响，通过多元逐步回归建立PEF、FEV1指标的预计方程。结果 FEV1、体重、腰围、臂围男生高于女生，差异有统计学意义;身高、坐高男女生差异无统计学意义;年龄、体重、身高、坐高、胸围与PEF和FEV1均为正相关(P<0.01)。将PEF、FEV1作因变量进行多元逐步线性回归分析发现男生PEF、FEV1均与体重、身高、臂围密切相关，同时FEV1和坐高也呈正相关;女生PEF和FEV1与坐高正相关，FEV1还和胸围关系密切(P<0.05)。结论 PEF、FEV1与性别、体重、身高、臂围、坐高、胸围关系密切，并且对男女儿童的PEF、FEV1影响不完全相同。

Objective To analyze the changes in pulmonary function trends of five and six grade primary school health pupils and explore the influencing factors of pulmonary function in school-age children in Shenyang,for provide scientific basis. Methods A total of 231 upper grades students in a primary school in Shenyang by cluster sampling were investigated by questionnaire.Pulmonary function (PEF,FEV1) and the physical growth indexes were observed.Stepwise multiple regressions were applied to build the predicated equations of pulmonary function. Results FEV1,weight,waistline,arm circumference were higher in boys than that in girls.PEF,FEV1 increased with the increase of the age.PEF,FEV1 were positive correlated with weight,height,sitting height,arm circumference,chest circumference and waistline(P<0.01).By stepwise multiple regressions PEF,FEV1 were closely related with height,sitting height,weight and arm circumference in boys; PEF,FEV1 were closely related with sitting height and chest circumference in girls(P<0.05). Conclusions PEF,FEV1 are closely related with height,sitting height,weight,arm circumference and chest circumference.Between different genders,influencing factors of pulmonary function are significantly different.