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目的：应用因子分析法初步探讨定时步行距离检测中诸生理参数之间的内在联系。方法：对象为３２例慢性阻塞性肺疾病患者；６分钟步行检测前后记录肺功能、动脉血气及呼吸困难程度积分，然后对ＭＲＣ积分、肺活量占预计值的百分比、第１秒肺活量占预计值的百分比、动脉血氧分压、实际步行距离占步行预计距离百分比（％ＷＤｐｒｅｄ）、Ｂｒｏｇ积分（ＢＳ）、步行检测前后的心率变化（ΔＨＲ）、动脉血碱剩余变化及血氧饱和度变化（ΔＳｐＯ２）等９项生理参数作因子分析。结果及结论：上述９项参数可合并为４个因子。其中４项基本参数，％ＷＤｐｒｅｄ、ＢＳ、ΔＨＲ及ΔＳｐＯ２被分别分类于４个因子中。通过具体分析各参数在４个因子中的位置，可对各项参数的意义及其联系作一初步解析。
OBJECTIVE: To explore the relationship between physiological parameters in timed walk distance detection by factor analysis. Methods: The subjects were 32 patients with chronic obstructive pulmonary disease. The pulmonary function, arterial blood gas and degree of dyspnea were recorded before and after 6-minute walking test. Then, the MRC score, the percentage of vital capacity, Percentage, arterial partial pressure of oxygen, actual distance to walk, percentage of walking distance (% WDpred), Brog score (BS), changes of heart rate before and after walking test (ΔHR), changes of arterial alkaloids and changes of blood oxygen saturation ) And other nine physiological parameters for factor analysis. Results and Conclusion: The above nine parameters can be combined into four factors. Four of the four basic parameters,% WDpred, BS, ΔHR and ΔSpO2, were categorized into four factors. Through the specific analysis of the parameters in the four factors in the position, the significance of the various parameters and their relations to make a preliminary analysis.