Effectiveness of a group resilience intervention for people with multiple sclerosis delivered via frontline services.

Study findings support READY effectiveness with PwMS, its broad applicability in this population, and its delivery through frontline services.IMPLICATIONS FOR REHABILITATIONREADY for MS is a highly structured, brief manualized group intervention.It is effective in improving participants' psychological functioning (resilience, anxiety, depression, stress, HRQoL, psychological flexibility, and related ACT processes).Psychological flexibility mediated the improvements in resilience, anxiety, depression, stress, HRQoL.READY can be effectively delivered through frontline services for PwMS without limitation in terms of participants' demographic and illness characteristics.