The impact of communicative and critical health literacy on trust in physicians among patients with systemic lupus erythematosus: the TRUMP2-SLE project

Objectives: Accessing the Internet has increased the gap in patient health literacy (HL), impacting patient-doctor trust. We examined how trust in physicians is affected by functional HL (the ability to read and write) and by broader concepts of HL, including communicative HL (the ability to extract information from communication to use) and critical HL (the ability to analyze and use information) among patients with systemic lupus erythematosus (SLE). Methods: This cross-sectional study enrolled 362 SLE patients at five academic centers between June 2020 and August 2021. The 14-item Functional Communicative Critical Health Literacy Scale assessed the three dimensions of HL (range: 1-4 points). Outcomes were trust in one's physician and physicians generally using the 5-item Wake Forest Physician Trust Scale (range: 0-100 points). General linear models adjusted for age, sex, education, income, disease activity, disease duration, depression, and time using the Internet. Results: Trust in one's physician increased with higher functional and communicative HL (per 1-pt increase, 3.21 [95%CI 0.61, 5.81], 5.8 [95%CI 1.96, 9.63]). Trust in physicians in general increased with higher communicative HL and decreased with higher critical HL (per 1-pt increase, 7.01 [95%CI 2.27, 11.76], -6.83 [95%CI -11.67, -1.99]). Longer Internet use was associated with both higher communicative and critical HL. Conclusions: Our findings suggest that rheumatologists can help patients build trust by encouraging dialogue about their health issues with their doctors and family members, rather than trying to improve their ability to discern health information.