Table 1. Study characteristics.

Author	Year	Journal	Setting	Population	Study type	Intervention	Comparator	Primary outcome	Outcomes	Time points
Aita et al. 16	2016	Rev Bras Ortop	Hand surgery unit, secondary care	Adults with SNAC stage 2	RCT, parallel group	Proximal row carpectomy	Four corner fusion	DASH	VAS, Grip strength, range of movemment	Baseline and 74 month final follow up
Bisneto et al. 15	2011	Clinics	Orthopaedic surgery unit, secondary care	Adults with grade 1 or 2 SNAC/SLAC	RCT, parallel group	Proximal row carpectomy	Four corner fusion	DASH	VAS, Grip strength, range of movemment, Jebsen Taylor	Baseline, 3 months, 6 months and final 12 month follow up
Thiele et al. 17	2009	BMC Musc Dis	Occupational therapy department, secondary care	Chronic wrist pain	RCT, crossover	Leather splint	Commercial wrist splint	AUSCAN	COPM, Grip strength	Baseline 3 weeks and 6 weeks

SNAC, scaphoid non-union advanced collapse; RCT, randomised controlled trial; DASH, disabilities of arm, hand and shoulder; VAS, visual analogue score; SLAC, scapholunate advanced collapse; AUSCAN, Australian/Canadian Hand Osteoarthritis Index; COPM, Canadian Occupational Performance Measure.