. Author manuscript; available in PMC: 2009 Oct 29.

Published in final edited form as: Med Sci Sports Exerc. 2008 Nov;40(11):1916–1922. doi: 10.1249/MSS.0b013e318180c390

Table 3.

Assessment of tracking of physical activity and inactivity over 2-years comparing the same measure at 6^th and 8^th grade using weighted kappa statistics and intraclass-correlations (ICC) (95% CI) for self-report and accelerometry.

	Self-Report		Accelerometery
	Weighted Kappa 3-day	ICC 3-day	Weighted Kappa 3-day	ICC 3-day	Weighted Kappa 6-day	ICC 6-day
Inactivity	0.14 (0.10, 0.18)	0.17 (0.17, 0.17)	0.13 (0.08, 0.17)	0.06^* (0.06, 0.07)	0.26^* (0.21, 0.30)	0.16 (0.15, 0.16)
MVPA	0.17 (0.13, 0.22)	0.22 (0.21, 0.22)	0.20 (0.16, 0.24)	0.23 (0.20, 0.25)	0.29^* (0.24, 0.33)	0.33^* (0.32, 0.33)
VPA	0.17 (0.12, 0.22)	0.17 (0.16, 0.17)	0.17 (0.13, 0.22)	0.19 (0.17, 0.20)	0.22 (0.18, 0.27)	0.25^* (0.24, 0.25)

Different from corresponding self-report statistic (p < 0.05).