The review by Nieuwenhuijsen et al is a good example of why we update systematic reviews. The researchers from the Netherlands, Finland and Germany combined the results of 45 intervention studies and found that the combination of care and help with return to work in nine studies was most effective and reduced sick leave with 25 days over a one-year period. This meant a 15% reduction of sick leave. In addition, the participants in the study had fewer depressive symptoms and their work capacity increased. This is the first time that this has been shown so clearly. Read the full review here.