Evidence-based practices effectively reduce weight in people with serious mental illness (SMI), yet participation is limited. Positive relationships between self-efficacy (SE), readiness to change (RtC), and subsequent participation in weight loss interventions have been demonstrated in the general population. The role of SE and RtC in predicting participation in individuals with SMI is explored. A total of 82 participants recruited from a county mental health clinic and a Veterans Affairs mental health clinic were randomly assigned to a weight management intervention or usual care. RtC and SE were assessed at baseline. Intervention participation rates were gathered. SE significantly correlated with intervention participation (p < 0.02). RtC did not predict significantly over and above SE. A linear combination of all measures was significantly related to participation (p < 0.05). To improve weight intervention participation by individuals with SMI, one direction may be to improve weight loss SE.

Evidence-based practices effectively reduce weight in people with serious mental illness (SMI), yet participation is limited. Positive relationships between self-efficacy (SE), readiness to change (RtC), and subsequent participation in weight loss interventions have been demonstrated in the general population. The role of SE and RtC in predicting participation in individuals with SMI is explored. A total of 82 participants recruited from a county mental health clinic and a Veterans Affairs mental health clinic were randomly assigned to a weight management intervention or usual care. RtC and SE were assessed at baseline. Intervention participation rates were gathered. SE significantly correlated with intervention participation (p < 0.02). RtC did not predict significantly over and above SE. A linear combination of all measures was significantly related to participation (p < 0.05). To improve weight intervention participation by individuals with SMI, one direction may be to improve weight loss SE.