Table 3.

Intraclass correlation coefficient for PEDro scale

		95% Confidence interval		F test with true value 0
	Intraclass correlationb	Lower bound	Upper bound	Value	df1	df2	Sig
Single measures	.860a	.645	.970	25.500	6	18	.000*
Average measures	.961c	.879	.992	25.500	6	18	.000*

Two-way mixed effects model where people effects are random and measures effects are fixed

^aThe estimator is the same, whether the interaction effect is present or not

^bType A intraclass correlation coefficients using an absolute agreement definition

^cThis estimate is computed assuming the interaction effect is absent, because it is not estimable otherwise

^*Statistically impossible to retrieve p = 0.000, the significance can be interpreted p ≤ 0.001