Efficacy and safety of regional blocks and multimodal analgesia in psychiatric patients at risk of opioid misuse: A systematic review

Table 4 Newcastle-Ottawa Scale assessment for observational studies

Ref.	Selection (4 stars)	Comparability (2 stars)	Outcome (3 stars)	Total score
Lenk et al[22]	3	1	2	6/9
Gedda et al[21]	4	2	3	9/9
Wei et al[24]	4	2	2	8/9
Oldfield et al[6]	3	1	3	7/9
Moller et al[23]	4	1	3	8/9
Fingerhood et al[18]	3	2	2	7/9
Wasan et al[3]	3	2	3	8/9
Rudolph et al[7]	4	2	2	8/9
Grau-López et al[4]	2	1	2	5/9
Workman et al[5]	3	1	2	6/9