Results
Yield
Four hundred and seventy-eight articles were identified from searching, of which 430 were excluded after applying the inclusion criteria to the title and abstract. Full papers were obtained for the remaining 48 articles and a detailed assessment was performed, resulting in the further exclusion of 37 articles. Of the 37 full-text articles excluded, 22 articles were based in an outpatient setting, one article was based in the intensive care environment with the majority of patients intubated, two articles had no physiotherapy interventions, nine articles were editorials and three articles were systematic reviews. Two more articles were identified and included from searching the reference lists of included articles. In total, 13 trials were included in this review. Fig. 1 illustrates the process of study selection.