Factor OQAQ Score(mean ± SD) P-value QUOROM Score(mean ± SD) P-value
Location (N)        
Europe (161) 24.0 ± 2.3   14.3 ± 2.6  
United States (90) 23.0 ± 2.9 0.003 13.5 ± 2.7 0.01
Canada (46) 24.7 ± 1.8 0.06 15.2 ± 1.7 0.02
Australia/Asia (49) 24.9 ± 2.1 0.02 15.3 ± 2.1 0.01
Africa (1) 25 0.67 15 0.78
Multiple (24) 22.9 ± 3.2 0.05 13.6 ± 3.3 0.23
South America (2) 24.5 ± 0.7 0.75 15 ± 1.4 0.69
Anesthesiology journal 23.8 ± 2.3   12.5 ± 2.3  
Non-anesthesiology journal 24.0 ± 2.6 0.46 14.8 ± 2.6 <0.001
Surgical intervention (N)        
Multiple surgeries/general anesthesiology (139) 23.8 ± 2.2   14.1 ± 2.6  
Obstetrics/gynecology (30) 23.8 ± 2.3 0.95 14.7 ± 2.1 0.23
General surgery (5) 24.6 ± 1.8 0.50 16.2 ± 1.3 0.08
Cardiothoracic surgery (34) 24.4 ± 2.1 0.23 14.4 ± 2.2 0.53
Orthopedic surgery (8) 24.8 ± 2.5 0.31 15.0 ± 1.6 0.34
Vascular surgery (9) 23.2 ± 3.2 0.48 14.6 ± 2.4 0.61
Pain medicine (133) 23.9 ± 2.8 0.86 14.3 ± 2.8 0.51
ENT (6) 23.8 ± 3.1 1.00 13.5 ±3.2 0.58
Other (9) 21.8 ± 1.7 0.10 13.8 ± 2.5 0.79
First author anesthesiologist 24.1 ± 2.1   14.1 ± 2.3  
First author non-anesthesiologist 23.7 ± 2.8 0.18 12.4 ± 2.8 0.28
ENT = Ear, Nose, and Throat
Table 2: Factors Affecting Quality of Reporting for Meta-analyses.