Inpatient multimodal rehabilitation and the role of pain intensity and mental distress on return-to-work: causal mediation analyses of a randomized controlled trial.

"The authors have no conflicts of interest to declare"

"The study was funded by the Research Council of Norway and allocated government funding through the Central Norway Regional Health Authority. The funders had no role in the design of the project and collection, analysis, interpretation of data, writing the manuscript and in publication decisions.The study was approved by the Regional Committee for Medical and Health Research Ethics in Central Norway (Number 2012/1241). All procedures performed in studies involving human participants were in accordance with the ethics standards of the institutional and/or national research committee and with the Declaration of Helsinki 1964 and its later amendments or comparable ethical standards. Informed consent was obtained from all individual participants included in the study."