Reliability and validity of Chinese version of Perceived Control of Asthma Questionnaire

Objective We aimed to translate the English version of Perceived Control of Asthma Questionnaire (PCAQ) into Chinese and to test the reliability and validity of the Chinese version of PCAQ in asthma patients. Methods Totally 125 patients with asthma were recruited and were investigated by the Chinese version of PCAQ. The results underwent reliability and validity test. Results The Cronbach's α coefficient of the Chinese version of PCAQ ranged from 0.815 to 0.904, higher than 0.7. The split half coefficient was 0.647; the test-retest reliability was 0.818, which showed that internal consistency of Chinese version of PCAQ was good. The content validity index was 0.952. Factor analysis got 3 factors, which explained 46.079% of the total variance; the factor loading of each item was >0.4. Conclusions The Chinese version of PCAQ has been proved to be reliable and valid. It can be used as a valid tool for the measurement of perceived control in asthma patients. Key words: Perceived Control of Asthma Questionnaire; Asthma; Validity; Reliability