Reference values of impulse oscillometry (IOS) for healthy Chinese children aged 4–17 years
Jinhong Wu, Hao Zhang, Yongsheng Shi, JinRong Wang, Yuling Han, Qiaoling Zhang, Ning Wang, Sha Liu, Yuehua Zhang, Huifen Zi, Fei Wang, Aihong Liu, Yuxin Song, ChunMei Jia, Yong Feng, Quanhua Liu, liya Wan, Minghong Ji, Zhen Long, Jianfeng Huang, Li Liu, Yun Sun, Suping Tang, Xiaoyan Dong, Xiaojian Zhou, Wenhui Jiang, Li Shen, Haohua Jiang
Abstract
Abstract Objective To establish the predicted value of pulmonary function determined by impulse oscillometry (IOS) in children (4–17 years old) in China. Methods A total of 6270 healthy children aged 4–17 years in China were included. The Master Screen IOS pulmonary function device (Jaeger Co, Germany) was used to detect the respiratory impedance (Zrs), resonant frequency (Fres), respiratory system resistance (Rrs) and respiratory system reactance (Xrs) at various oscillation frequencies, and the indices above were analysed. Stepwise multivariate regression was used to establish the regression equation of related parameters of IOS in different sexes, ages, height, and weight. Results The differences in the main IOS parameters between different age stages were statistically significant regardless of sex ( P < 0.05). The stepwise multivariate regression analysis showed that IOS parameters were related to height, age, and weight, and most IOS parameters were most closely related to height (the absolute value of the regression coefficient was the largest). With increasing age and height, the values of Z 5 , R 5 , R 20 , R 5 –R 20 , and Fres decreased, while the value of X 5 increased. Through height, age, and weight, we obtained the normal predicted values equation of children’s IOS parameters. Compared with the other reference equations, our reference equation is more suitable for Chinese children. Conclusions The study revealed the reference values of IOS parameters in healthy Chinese children. In the evaluation of results for lung function measurements, this predicted value equation is more consistent with the characteristics of Chinese children than other reference equations. Clinical Trial : ChiCTR: 1800019029.