Perspectives on Implementing the Patient Health Questionnaire-4 in Low-Vision Service Organizations to Screen for Depression and Anxiety

Purpose: To describe the process of implementing a screening questionnaire for depression and anxiety, the Patient Health Questionnaire-4 (PHQ-4), in low-vision service (LVS) organizations. Methods: This study consisted of three parts: (1) a usability study combined with semistructured interviews, inwhich clients (n= 10) of LVS organizations expressed their preference for using the PHQ-4; (2) a feasibility study, in which the PHQ-4 was implemented on a small scale and its use was evaluated, involving health care providers (n= 6) and clients (n = 9); and (3) semistructured interviews to identify barriers and facilitators for implementing the PHQ-4 according to health care providers (n= 6) andmanagers (n = 4) of LVS organizations. Results were integrated into themes and linked to constructs of the Consolidated Framework for Implementation Research (CFIR). Results: Six themes were derived from the substudies: (1) quality of the intervention, (2) applicability for clients of LVS organizations, (3) attitude and needs of clients, (4) attitude of health care providers, (5) support within LVS organizations, and (6) embedment in current practice. Results could be linked to 12 CFIR constructs. The constructs "relative advantage," "patient needs and resources," and "available resources" emerged most prominently in our themes as either barrier or facilitator. Conclusions: The PHQ-4 seems an appropriate screening instrument for use in LVS organizations because of its quality and adaptable use. It might provide opportunities to timely detect depression and anxiety, but challenges in implementing the PHQ-4 should be considered. Translational Relevance: Barriers and facilitators for implementing the PHQ-4 may also apply to implementing other questionnaires in LVS organizations.