. Author manuscript; available in PMC: 2010 Mar 1.

Published in final edited form as: Med Sci Sports Exerc. 2009 Mar;41(3):530–538. doi: 10.1249/MSS.0b013e31818ace55

Table 3.

Intraclass correlation coefficients (ICC_1,1) and 95% confidence intervals (CI) of physical activity measures overall and among women who reported recreational activity in the WHI Measurement and Precision Study

	Entire sample		Women with ≥1 episode of recreational physical activity^#
	ICC_1,1	95% CI	ICC_1,1	95% CI
Form 34: Exercise or recreational physical activity	n=569		n=310
Mild recreational physical activity (MET-hours/week)	0.51	0.45, 0.57	0.55	0.47, 0.62
Moderate recreational physical activity (MET-hours/week)	0.57	0.52, 0.63	0.60	0.53, 0.67
Strenuous recreational physical activity (MET-hours/week)	0.76	0.73, 0.80	0.76	0.71,0.80
Walking recreational physical activity (MET-hours/week)	0.75	0.72, 0.79	0.71	0.65, 0.76
Moderate to strenuous recreational physical activity (MET-hours/week)	0.77	0.73, 0.80	0.74	0.68, 0.78
Total recreational physical activity (MET-hours/week)	0.76	0.71, 0.79	0.73	0.67, 0.77
Form 42: Household and yard physical activity	n=523
Household physical activity (MET-hours/week)	0.60	0.55, 0.66	N/A^*
Yard physical activity (MET-hours/week)	0.71	0.66, 0.75
Sitting and lying down (hours per week)	0.60	0.54, 0.65

Only applicable for women who completed the recreational physical activity form

One episode of any recreational physical activity, regardless of intensity or duration