TABLE 3. Validity Results in 3 Age Groups.

Group	ICC (3-Way Mixed)	SEM	SDC	MD
1	0.94	0.80	2.20	0.31
2	0.89	1.54	4.27	1.25
3	0.95	1.63	4.50	0.10
Total	0.99	1.41	3.88	0.46 (standard deviation = 1.98)

Abbreviations: ICC, intraclass correlation coefficient; MD, mean difference; SDC, smallest detectable change; SEM, standard error of the measurement.