Table 1.

Details of the studies included

No.	Study	Level of evidence	Type of study	Year of publication	Procedures	Number of patients/feet
1	Bauer et al. [29]	IV	Case series	2009	Percutaneous	168/189
2	Bauer et al. [30]	IV	Case series	2010	Percutaneous	82/104
3	Bösch et al. [22]	IV	Case series	2000	Bösch technique	64/98
4	Bösch et al. [24]	IV	Case series	1990	Bösch technique	45/64
5	Enan et al. [35]	IV	Case series	2010	Mini-incision	26/40
6	Gadek and Liszka [39]	IV	Case series	2013	Mini-incision	54/54
7	Giannini et al. [34]	II	Prospective comparative study	2013	Mini-incision	20/40
8	Iannò et al. [28]	IV	Case series	2013	Mini-incision	72/85
9	Kadakia et al. [38]	IV	Case series	2007	Mini-incision	13/13
10	Lui et al. [19]	IV	Case series	2008	Arthroscopy	83/94
11	Maffulli et al. [33]	III	Retrospective comparative study	2009	Mini-incision versus Bösch osteotomy	72/72
12	Magnan et al. [27]	IV	Case series	2005	Mini-incision	82/118
13	Markowski et al. [25]	IV	Case series	1991	Bösch osteotomy	45/63
14	Martínez-Nova et al. [40]	IV	Case series	2008	Percutaneous	26/30
15	Portaluri et al. [26]	IV	Case series	2000	Bösch technique	156/197
16	Radwan and Mansour [31]	III	Retrospective comparative series	2012	Percutaneous	31/31
17	Roth et al. [32]	III	Retrospective comparative study	1996	Mini-incision versus Kramer osteotomy	105/124
						124/124
18	Sanna and Ruiu [41]	IV	Case series	2005	Mini-incision	83/90
19	Scala and Vendettuoli [36]	IV	Case series	2013	Mini-incision	126/146
20	Steinböck and Leder [42]	IV	Case series	1988	Percutaneous	72/72
21	Sun et al. [37]	IV	Case series	2010	Mini-incision	79/150
22	Weinberger et al. [43]	IV	Case series	1991	Percutaneous	204/301