Development and Initial Validity of the Patients’ Literacy Scale Among Outpatients in Hangzhou City, China

PURPOSE: There are few studies on the intervention of the doctor–patient relationship (DPR) from patients’ perspective, because of lacking appropriate measurement instruments for the effect of the patient interveqntion. Understanding the status of patients’ literacy (the ability to initiatively obtain, read, and analyze health-related materials, make appropriate decisions, reduce risks of health-related problems) and developing the patients’ literacy scale (PLS) align with the interests of patients, doctors, and researchers. PATIENTS AND METHODS: This study was conducted in two stages: item building and item refinement. A total of 303 subjects were recruited from the outpatient hall in three hospitals with different levels in Hangzhou city, China. Twenty patients and seven experts determined the face and content validity, respectively. The construct validity, convergent, discriminant validity, and known-group validity of the scale were examined by exploratory and confirmatory factor analysis (EFA and CFA). Internal consistency, including Cronbach’s alpha, McDonald’s ω, split-half reliability, and composite reliability (CR), was also tested. RESULTS: The EFA of PLS showed that Kaiser–Meyer–Olkin (KMO) measure of sampling adequacy was 0.787, and Bartlett’s Test of Sphericity showed a significance of p < 0.001. The extracted four-factor (patient activation, knowledge, attitudes, practice) model explained 61.266% of the total variance. For the overall PLS, the Cronbach’s alpha, McDonald’s ω and split-half reliability coefficient were 0.815, 0.838 and 0.720, respectively. The CFA showed the goodness of fit (RMSEA = 0.065, CMIN/DF = 1.635, GFI = 0.900, CFI = 0.905, TLI = 0.909). The CR of each factor in this scale was 0.740, 0.732, 0.630, and 0.749, respectively. CONCLUSION: This study showed that the PLS was valid and reliable to measure the patients’ literacy (PL). The 15-item PLS can help not only measure PL but also be used as a standard and advocacy target for patients’ behavioral model which can further improve the DPR.