Perioperative respiratory muscle training improves respiratory muscle strength and physical activity of patients receiving lung surgery: A meta-analysis

Table 2 Quality assessment for included trials according to Physiotherapy Evidence Database scoring scale

Ref.	1	2	3	4	5	6	7	8	9	10	11	Total score
Weiner et al[22]	N	Y	N	Y	N	N	N	N	Y	Y	Y	5/10
Brocki et al[23]	Y	Y	Y	Y	N	N	N	Y	Y	Y	Y	7/10
Brocki et al[24]	Y	Y	Y	Y	N	N	N	Y	Y	Y	Y	7/10
Taşkin et al[25]	Y	Y	N	Y	N	N	Y	Y	Y	Y	Y	7/10
Messaggi-Sartor et al[26]	Y	Y	N	Y	N	N	Y	Y	Y	Y	Y	7/10
Kendall et al[27]	Y	Y	N	Y	N	N	N	Y	Y	Y	Y	6/10
Laurent et al[28]	Y	Y	N	Y	N	N	N	Y	Y	Y	Y	6/10

N: No criteria or not satisfied; Y: Yes (criteria satisfied); 1: Eligibility criteria; 2: Random allocation; 3: Concealed allocation; 4: Baseline comparability; 5: Blind subjects, 6: Blind therapists; 7: Blind assessors; 8: Adequate follow-up; 9: Intention-to-treat analysis; 10: Between-group comparisons; 11: Point estimates and variability. The total Physiotherapy Evidence Database score is the sum of items 2 to 11, which relate to internal validity. Item 1 is reported to indicate external validity.