Is metaphyseal ulnar shortening osteotomy superior to diaphyseal ulnar shortening osteotomy in the treatment of ulnar impaction syndrome? A meta-analysis

Table 5 Interval group demographic characteristics

Ref.	Preoperative ulnar variance (mm)	Pain score (VAS)	Grip strength of the unaffected side (%)	Selected outcomes
Bernstein et al[4], 2004	1	Not reported	54/56	Ulnar variance; VAS; grip strength; complication rate; secondary procedure rate
Marquez-Lara et al[12], 2017	1.285714	6.64/6.45	Not reported	Secondary procedure rate; complication rate; quick DASH score
Sennwald et al[10], 2013	0.666667	7.3/8.2	Not reported	Ulnar variance; VAS
Constantine et al[41], 2000	0.6	Not reported	Not reported	Secondary procedure rate; complication rate
Smet et al[11], 2014	1.588235	Not reported	Not reported	Secondary procedure rate; complication rate; quick DASH score
Oh et al[9], 2018	1.034483	5.8/6.0	51/ 59	Secondary procedure rate; complication rate; quick DASH score

VAS: Visual analog scale.