Table 1.

Study characteristics

Study	Year	Design	Level of evidence	MINORS score
Bouju et al. [11]	2014	Retrospective	IV	8/16
Lädermann et al. [36]	2013	Retrospective	III	10/16
Mizuno et al. [43]	2014	Retrospective	IV	10/16
Neyton et al. [45]	2012	Retrospective	IV	10/16

MINORS Methodological Index for Nonrandomized Studies