. 2019 Feb 18;27(11):3461–3470. doi: 10.1007/s00167-019-05396-4

Table 2.

Relationships between the outcome measures investigated with the Phi coefficient

Outcome variable	Quadriceps strength LSI ≥ 90%	Hamstring strength LSI ≥ 90%	Single-leg-hop test LSI ≥ 90%
Quadriceps strength LSI ≥ 90%	–	0.22^a	0.26^a
Hamstring strength LSI ≥ 90%		–	0.11^b
Single-leg-hop test LSI ≥ 90%

Outcome variable

Quadriceps strength
LSI ≥ 90%

Hamstring strength
LSI ≥ 90%

Single-leg-hop test
LSI ≥ 90%

Quadriceps strength

LSI ≥ 90%

–

0.22^a

0.26^a

Hamstring strength

LSI ≥ 90%

–

0.11^b

Single-leg-hop test

LSI ≥ 90%

LSI limb symmetry index

^aWeak positive correlation (Phi coefficient between 0.20 and 0.29)

^bNo or negligible correlation (Phi coefficient between 0.01 and 0.19)