关键词: 计算机通信网络, 医师, 互联网医疗, 使用意愿, 信度, 效度

Abstract: Background　The implementation of Internet-based healthcare is conducive to the innovation of healthcare delivery models to meet residents' growing healthcare needs.However, searching the literature at home and abroad found that there were relatively few studies exploring the use of Internet medicine by doctors. Objective　To develop a questionnaire on doctors' intention towards using the Internet-based healthcare delivery model and to evaluate its reliability and validity.Methods　The initial draft of Questionnaire on Doctors' Intention Towards Using the Internet-based Healthcare Delivery Model（QDIUIHDM） was developed based on the frameworks of UTAUT and VAM models，including 10 dimensions and 27 items.Then，the questionnaire was used in a survey in an accidental sample of doctors from 3-6 pubic hospitals in 3 cities （Guangzhou，Shengzhen，Zhaoqing，1-2 pubic hospitals were sampled from each city） of Guangdong Province from November 2017 to January 2018.According to the survey results，the initial draft of questionnaire was evaluated by reliability analysis and the exploration factor analysis（EFA）.Then the questionnaire was modified in accordance with the analysis results，and was evaluated by confirmatory factor analysis（CFA），and after this，the final draft of the QDIUIHDM was developed.Results　A total of 350 doctors participated in the survey，and 309 of them（88.3%） responded effectively.The Cronbach's α coefficient for the initial draft of QDIUIHDM was 0.912，and for its dimensions ranged from 0.738 to 0.929.The KMO index was 0.914，and Bartlett's test was also acceptable with P<0.001 （χ2=5 227.92），thus EFA can be performed.Eight factors with eigenvalue greater than 1.000 were extracted by principal component analysis，and the cumulative contribution rate of which was 74.764%.Based on the results of EFA and research topic，dimensions of perceived usefulness and perceived effectiveness were incorporated in the perceived benefits dimension，but the dimensions of individual creativity and self-efficacy were retained.Thus the revised initial draft of QDIUIHDM includes 9 dimensions and 27 items.The CFA result showed an acceptable fit with χ2/df=1.682，GFI=0.900，RMSEA=0.047，CFI=0.961，NFI=0.911，IFI=0.962，PGFI=0.742，PNFI=0.783.The factor loading was between 0.638 and 0.894，the squared multiple correlation was between 0.407 and 0.837，the composite reliability was between 0.750 and 0.930，and the average variance extracted was between 0.502 and 0.815.Therefore，there are 9 dimensions in the final draft of the questionnaire：perceived benefits（6 items），perceived complexity of use（3 items），perceived risk （3 items），perceived value
（2 items），social influence（3 items），facilitating conditions（3 items），individual creativity（2 items），self-efficacy
（2 items） and intention-to-use （3 items）.Conclusion　The QDIUIHDM has been proved to be reliable and valid，which can be used to evaluate the doctors' intention toward using the Internet-based healthcare delivery model and its influencing factors.

Key words: Computer communication networks, Physicians, Internet healthcare, Usage intention, Reliability, Validity