Effects of Inpatient Occupational Rehabilitation vs. Outpatient Acceptance and Commitment Therapy on Sick Leave and Cost of Lost Production: 7-Year Follow-Up of a Randomized Controlled Trial.

I-MORE outperformed O-ACT in reducing sickness absence and production loss costs during seven years of follow-up, but due to a limited sample size the results were unprecise. Considering the potential for substantial societal cost savings from reduced sick leave, there is a need for larger, long-term studies to evaluate return-to-work interventions.