Determining the Feasibility of a Mail-In Saliva Sample Protocol for Persons Living with HIV in Two Urban Northeast United States Clinics.

Background: Mail-in saliva samples are a participant-centered means of monitoring patients' oral and overall health that may help to reduce unnecessary medical trips and more efficiently use provider time. The use and acceptability of mail-in saliva samples have been studied in high-risk populations; however, it has not been studied in cohorts of people living with HIV (PLWH). Objective: To investigate the feasibility of PLWHs' willingness to provide mail-in saliva samples, 900 saliva collection kits were mailed to a randomized sample of PLWH across two urban and diverse clinics in the Northeast United States in 2019-2020. Results: 73/900 (8%) packages were returned to study personnel, with 100% (73/73) containing saliva deemed usable for analysis. 55/900 (6%) of packages were returned to the study team undeliverable. Further information may be gained from investigating the influence of personalized test results, health literacy, the requirement of the oral health survey, and study compensation that may affect an individual's motivation to participate in the study. Conclusion: While findings suggest limited feasibility of mail-in saliva collection without personalized test results in a cohort of PLWH in terms of response rate, all returned saliva samples were usable for analysis suggesting that addressing potential barriers may improve response rates and the feasibility of using mail-in salivary diagnostics to monitor disease progression in PLWH in future studies.