Table 3

Methodological quality assessment of 21 shoulder pain prevalence studies

	Representativeness			Data Quality				Definition of shoulder pain			Overall (/7)
Reference	1	2	2a	3	4	5	6	7	8	9
13		80%	NA			NA	NA				4
21		81%	NA			NA	NA				4
22		62%				NA	NA				6
14		84%	NA			NA	NA				6
23		85%	NA			NA	NA				5
24		NR				NA	NA				5
25		99%	NA			NA	NA				4
26		NR			NA		NA				2
27		71%				NA	NA				6
28		63%				NA	NA				6
29		✔	NA			NA	NA				7
30		57%				NA	NA				7
31		88%	NA			NA	NA				7
32		89%	NA			NA	NA				7
33		NR				NA	NA				4
34		NR				NA	NA				3
35		NR				NA	NA				5
36		62%				NA	NA				6
37		49%				NA	NA				6
38		82%	NA								6
39		NR				NA	NA				5

NA not applicable, NR not reported

✔: this study was a large clinical database, but does not have a response rate