Beyond Technological Access: Exploring Contextual Factors Related to Teleassessment Usability in Interstitial Lung Disease.

Telehealth has the potential to improve access to healthcare, but teleassessment usability may be influenced by contextual factors beyond technology access alone. This study investigated factors associated with teleassessment usability among individuals with interstitial lung disease (ILD) in Brazil using a convergent mixed methods design with 31 adults from four Brazilian regions. Usability was assessed with the Telehealth Usability Questionnaire (TUQ-Brazil); associations with contextual variables were examined using Spearman's correlation. Qualitative data were obtained through semi-structured interviews and analyzed using thematic analysis. Participants generally reported acceptable usability perceptions with predominance of agreement responses; greater dispersion was observed for items related to equivalence with in-person care and video quality. Usability was significantly associated with income (rho = 0.437; p = 0.014), perceived clinical feasibility (rho = -0.397; p = 0.027), and perceived intensity of access barriers (rho = -0.428; p = 0.016). Qualitative findings identified financial constraints, digital literacy, internet stability, third-party support dependence, and absence of physical examination as key experiential factors. Teleassessment was perceived as a complement for follow-up and triage rather than a substitute for face-to-face assessment. Usability in ILD is shaped by socioeconomic, clinical, and structural factors, underscoring the need to address digital inequalities in telehealth implementation.