Surgery for calcifying tendinitis of the shoulder: A systematic review

Table 3 Methodological quality scores of the individual included randomized controlled trial’s and qausi-randomized controlled trial

Ref.	Adequate randomization?	Allocation concealment?	Blinding patients?	Blinding caregiver?	Blinding outcome assessors?	Incomplete outcome data addressed? dropouts	Incomplete outcome data? ITT-analysis?	No selective outcome reporting?
Rubenthaler et al[10]	+	+	+	-	?	+	-	+
Clement et al[11]	+	+	+	-	+	+	-	+
Hofstee et al[12]	-	-	?	-	?	+	-	+

12 quality criteria of Furlan et al[8]. +: Yes = 1 point; -: No = 0 points; ?: Unclear/unsure = 0 points. High-quality ≥ 50%, Low-quality ≤ 50%.