TABLE 2

Overview of methodological quality (PEDro score) of included studies

First author [ref.]PEDro criteria
1#234567891011Total
Additional exercise modalities
 Benton [9]+++++4
 Vonbank [10]+++3
 Bernard [11]++++++5
 Dourado [12]+++++4
 Phillips [13]+++++4
 Mador [14]+++++++6
 Würtemberger [15]+++++4
 Alexander [16]+++3
 Holland [17]++++++++7
 Subin [18]+++++4
 Sívori [19]+++++4
 Costi [20]+++++++++8
 Vivodtzev [21]++++++5
 Rooyackers [22]++++4
 Gloeckl [23]++++++6
NIV
 Johnson [24]§+++++4
 Toledo [25]++++3
 Reuveny [26]++++++6
 Costes [27]++++4
 van ’t Hul [28]++++++++8
 Hawkins [29]++++++5
 Bianchi [30]++++++5
 Garrod [31]+++++++6
 Duiverman [32]+++++4
Oxygen
 Scorsone [33]§+++++5
 Emtner [34]+++++++7
 Garrod [35]+++++++++8
 Wadell [36]+++++++6
 Dyer [37]+++++++6
 Rooyackers [38]++++++5
 Bjørgen [39]++++3
 Ringbaek [40]++++++5
Heliox
 Johnson [24]§+++++4
 Eves [41]++++++++++9
 Scorsone [33]§+++++5
Prescription medications
 Pasqua [42]++++3
 Ambrosino [43]+++++++++8
 Casaburi [44]+++++++6
 Creutzberg [45]+++++++++++10
 Ferreira [46]++++++++7
 Miki [47]++++++++++9
 Burdet [48]+++++++++8
 Miki [49]++++++++++9
 Hornikx [50]+++++++++8
 Blanco [51]+++++++++8
 Satta [52]++++++6
 Valderramas [53]+++++++++8
Nutrition
 Laviolette [54]+++++++6
 Sugawara [55]+++++++++8
 Steiner [56]+++++++++8
 Gurgun [57]+++++4
 Broekhuizen [58]++++++++7
 Deacon [59]++++++++7
 Faager [60]++++++5
 Fuld [61]+++++++7
 Menier [62]+++3
 Borghi-Silva [63]+++++5
Breathing exercises
 Magadle [64]+++++++7
 Mador [65]++++++5
 Larson [66]++++++5
 Berry [67]++++++5
 Wanke [68]++++4
 Weiner [69]+++++5
 Dekhuijzen [70]++++++5
 Kunikoshita [71]++++4
 Sykes [72]++++++++7
 Goldstein [73]+++++5
 Collins [74]+++++5
 van Gestel [75]+++++++6
Other
 Carrieri-Kohlman [76]++++++5
 Zanotti [77]++++++++++9
 Alexander [78]+++++4
 de Godoy [79]++++++5
 Sharifabad [80]+++++4
 Norweg [81]§++++3
 Deering [82]+++++++6

  • 1: eligibility criteria specified; 2: randomisation; 3: concealed allocation; 4: groups similar at baseline; 5: blinding of subjects; 6: blinding of therapists; 7: blinding of assessors; 8: at least one key outcome with >85% of initially allocated subjects; 9: intention-to-treat analysis; 10: between-group statistical comparison; 11: study provides both point measures and measures of variability for at least one key outcome; NIV: noninvasive ventilation; +: criteria decision rule satisfied. #: item does not contribute to overall score; : exemplar studies of patient-centred care; §: study included two appropriate interventions.