Table 5.

Summary of evidence and best evidence synthesis according to van Tulder et al. (28) of controlled group design studies with moderate or strong methodological quality.

– no effect, + positive effect, *two outcomes, NA, information not available.

Overall level of evidence from best evidence synthesis (28): + + +/− − − = strong: consistent findings among multiple high quality (quality rating: strong) RCTs, ++/−− = moderate: consistent findings among multiple low quality (quality rating: moderate) RCTs and/or one high quality RCT, +/− = limited: one low quality RCT and conflicting in case of inconsistent findings.

The color code represents the groups of similar types of interventions. Red colours stand for constraint-based therapies, blue colors for rehabilitation technologies and green colors for other approaches.