The Detection Of Pulmonary Functionnormal Value And Districtand Correlated Factors Of School-aged Children

Objective:The detection of pulmonary functionnormal value and districtand correlated factors of school-aged children,Evaluate the difference with current judgment standards,to providereference for pulmonary function.Method:Randomly selected 280 healthy children from 6 to 12 years in a school in our city(excluding criteria:congenital dysplasia and defects,congenital heart and lung disease,acute and chronic lung disease,asthma,epilepsy and other conditions that may affect lung function)for lung function tests.One year old is an age group with 7 groups.There are 40 cases in each age group,20 males and 20 females,and record their gender,date of birth,Height and weight were measured,MasterScreen pneumo-type pulmonary function test spirometer produced by the German Yage Company was used to measure the mean values of Pulmonary function parameters.The 4 parameters that best reflected the lung function were used as the measurement index,ie,forced vital capacity(FVC)and forced exhalation in the first second.Capacity(FEV1),Peak Expiratory Flow Rate(PEF),Maximum Expiratory Midstream Velocity(MMEF 75/25).Each tester measured 3 times,taking the best result record print.Result:According to Single factor analysis of variance,FVC,FEV1,PEF,MMEF75/25 were positively correlated with age,height,weight,BMI(P<0.05),and FVC was related to gender,there was a significant difference between different genders(P<0.05);Multiple regression analysis showed that FVC,FEV1,PEF,and MMEF75/25 were related to height among different genders,the effects of age and weight varied according to indicators.Mean actual and predicted mean values of FVC,PEF,and MMEF75/25 were statistically different(P<0.05).Conclusion:Age,gender,height,weight,and BMI are the influencing factors of lung function in children.There is a statistical difference between the measured mean and expected mean of FVC,PEF and MMEF75/25(P<0.05).