Table 4.

The GRADE evidence quality for functional outcomes

Functional outcomes	Number of studies	Study design	Mean difference [95 % CI]	P	P for heterogeneity	Quality
Olerud and Molander Ankle Score	4 [14,16,21,25]	Retrospective	0.01 [−0.02, 0.03]	0.56	0.09	Low
American Orthopaedic Foot and Ankle Surgery score	2 [27,28]	Retrospective	4.10 [0.03, 8.17]	0.05	0.10	Low
Radiologic union	3 [10,33,38]	RCT	−0.53 [−2.39, 1.34]	0.58	<0.00001	Lowa,b
	8 [14,16,20,22,24,25,29,32]	Retrospective	−0.98 [−3.61, 1.66]	0.47	<0.00001	Low

^aTotal number of events is less than 300

^b I ² > 50 %