Table 1.

Test-retest, inter-rater and intra-rater reliabilities.

	ICC (SD)	95% CI	SEM
Test-retest	0.879 (0.34)	0.838 to 0.911	0.12
Inter-rater	0.953 (1.03)	0.919 to 0.975	0.22
Intra-rater
Rater 1	0.804 (0.68)	0.681 to 0.891	0.30
Rater 2	0.858 (0.66)	0.772 to 0.921	0.25
Rater 3	0.821 (0.69)	0.701 to 0.901	0.29

Note. ICC = Intraclass Correlation Coefficient; SD = standard deviation; 95% CI = confidence interval; SEM = standard error of measurement.