Table 2.

Summarises basic characteristics of included studies.

Study	Year	Level of Evidence*	No. of Shoulders	Mean Follow-Up (Months)
Rittmeister [3]	2001	IV	6	54.3 (48-73)
Hattrup [16]	2012	IV	19	37 (24-66)
Ekelund [30]	2011	IV	27	56 (18-143)
Holcomb [31]	2010	IV	21	36 (24-73)
John [32]	2010	III	17	24.3 (11.5-40.9)
Wooduff [33]	2003	IV	13	87 (60-110)
Young [34]	2011	IV	18	46 (25-84)

^* Oxford Centre for Evidence-Based Medicine 2011 Levels of Evidence.