| 成都地区正常老中青年呼气峰流量探讨 |
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| 摘 要： |
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| 关 键 词： | 老年人 中年人 青年人 呼气峰流量 最大呼气流量－容积曲线 哮喘 |
Study of peak expiratory flow in normal young, middle-aged and old persons in Chengdu area] |
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| Authors: | G Huang G Liu J Huang |
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| Institution: | Department of Physiology, School of Basic Medical Sciences, WCUMS, Chengdu 610041, China. |
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| Abstract: | OBJECTIVE: To build the normal ranges and regression equations of peak expiratory flow (PEF) in normal young, middle-aged and old persons. METHODS: PEF, FVC, V75, V50, V25 were measured in 393 normal young, middle-aged and old persons with the youngest aged 20 years and the eldest 84 years. Regression equations of PEF were built for younger group (20 yr-49 yr) and elder group (50 yr-84 yr) respectively. RESULTS: PEF, FVC, V75, V50, V25 were decreased with increase of age. The regression equations showed that both in younger and elder groups, PEF was negatively correlated with age in male (P < 0.0001-0.002, r = 0.32-0.39) and positively correlated with FVC in female (P < 0.0001-0.0005, r = 0.32-0.59). PEF was highly correlated to V75 with r = 0.87-0.94 in male and r = 0.93-0.96 in female. The coefficient of variation (CV) of PEF was in normal range (16%-24%) for all age groups except male and female above 70 years old with CV of 30% and 27% respectively. This confirmed the data was reliable. CONCLUSION: The normal ranges and regression equations of PEF constructed as a result of this study for normal humans of 20-84 years old can be put to use in clinical work and public health. |
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