Objective To investigate the scientificity of patient-reported outcomes instrument for asthma ( Asthma-PRO) , which maybe used to evaluate the efficacy of anti-asthma drugs in clinical trials and clinical practice.
Methods 366 asthma patients and 100 healthy subjects were face-to-face interviewed by well-trained investigators, and the data of Asthma-PRO instrument were collected. The psychometric performance such as reliability, validity, responsiveness and clinical feasibility in the Asthma-PRO instrument was evaluated.
Results The split-half reliabilities of the Asthma-PRO instrument and each dimension were greater than 0.8. In the analysis of internal consistency of each dimension, the cronbach’s alpha coefficient was greater than 0.7. Factor analysis showed that the instrument has good construct validity. The scores of each of the facets and total scores between the asthma patients and the healthy subjects were different. The recovery rate and the efficient rate of the questionnaire were more than 95%, and the time required to complete a questionnaire was within 20 minutes, indicating that the scale had a high clinical feasibility.
Conclusion The Asthma-PRO instrument has good reliability, validity, responsiveness and clinical feasibility.
Citation： DONG Limin ,ZHANG Yanbo,YAO Yahong,LIU Xiaoying. Development of Patient-Reported Outcomes Instrument for Asthma:A Psychometric Test. Chinese Journal of Respiratory and Critical Care Medicine, 2013, 12(1): 32-35. doi: 10.7507 /1671 -6205.20130008 Copy