Table 4

Meta-analyses of hop tests for construct validity

Functional performance test	Weighted mean correlation coefficients (95% CIs)
Functional performance test	Quadriceps strength	I²	Hamstring strength	I²	IKDC	I²	KOOS sport/rec	I²	KOOS QoL	I²	ACL-RSI	I²
Single leg hop	0.54 (0.43, 0.64)^10:395	49	0.36 (0.07, 0.59)^4;169	68	0.32 (0.21, 0.42)^7;369	15	0.27 (0.16, 0.38)^4;280	0	0.29 (0.11, 0.46)^3;192	43	0.23 (0.06, 0.38)^2;140	0
6 m timed hop	0.53 (0.24, 0.74)^2;137	74	0.51 (0.36, 0.63)^2;116	0	0.24 (0.11, 0.36)^4;238	0	0.21 (0.03, 0.38)^2;120	0	0.22 (0.04, 0.39)^2;120	0	0.32 (-)^1;50	–
Crossover hop	0.65 (0.21, 0.87)^3;90	81	0.46 (-)^1;29	–	0.25 (0.10, 0.39)^5;249	27	0.26 (0.12, 0.38)^3;208	0	0.18 (-0.01, 0.36)^2;120	8	0.22 (-)^1;50	–
Triple hop	0.53 (0.37, 0.66)^3;110	0	0.42 (0.18, 0.61)^2;60	0	0.25 (0.13, 0.43)^4;238	0	0.26 (0.12, 0.38)^3;208	0	0.22 (0.02, 0.40)^2;120	18	0.27 (-)^1;50	–
Vertical hop	0.56 (0.34, 0.73)^6;368	82	0.33 (-0.07, 0.64)^2;101	69	0.50 (0.36, 0.62)^3;136	0	–	–	–	–	0.40 (0.08, 0.65)^3;577	89

Numbers in superscript represent number of studies; total number of individuals. Negative values (6 m Timed Hop) have been removed from table for consistent presentation of result
ACL-RSI, Anterior Cruciate Ligament Return to Sport after Injury Scale; IKDC, International Knee Documentation Committee Subjective Knee Form; KOOS, Knee injury and Osteoarthritis Outcome Score; QoL, quality of life.