Fig. 9

Forest plot of the studies included in the main meta-analysis for discriminative validity as subgroups depending on the starting knee angle used in the test (15°, 20°, 40° or 45°). One study [41] was omitted because it was the only one to use 35° as the starting angle. ^aGroup numbers (i.e. “Total”) have been divided by the number of times each group has been included in the respective subgroup meta-analysis