Association Between Varicella-Zoster Virus Vaccination and Patient Experience in Elderly Japanese Outpatients: A Case-Control Study

Abstract

Background: This study examined the association between patient experience (PX, events experienced by patients during primary care that are an indicator of patient-centered quality) of primary care and varicella-zoster virus (VZV) vaccine uptake in older adults. Methods: A case-control study of VZV vaccination was conducted at a community hospital in Ibaraki, Japan. Patients aged 65 years or older who had continuously been patients of the hospital between April 2018 and April 2021 were included in the study. The vaccinated group consisted of 166 VZV-vaccinated patients. The controls consisted of 29 age- and sex-matched patients who did not receive VZV vaccination. A self-administered questionnaire was distributed between August and September 2021. It included the Japanese version of the Primary Care Assessment Tool Short Form (JPCAT-SF) to evaluate PX and included questions about recommendations for VZV vaccination by a physician and the vaccination history of relatives. Multivariable and intermediate factor analyses were used to assess whether there was an association between VZV vaccination and PX. Results: Questionnaires were sent to 457 subjects. Responses from 228 (116 in the vaccination group and 112 in the non-vaccinated group) were included in the analysis. Multivariable analysis, which excluded physician recommendation for VZV vaccination as a variable because it was an intermediate factor in the analysis, showed an association between PX and VZV vaccination (odds ratio, 1.38; 95% confidence interval, 1.00-1.92; P = .049). Conclusions: PX was associated with past VZV vaccination. Physician recommendation for VZV vaccination was an intermediate factor between PX and VZV vaccination.