Table 1.

activPAL^™ performance compared to direct observation (mean (95% CI)).

	DO	AP
MVPA (min)	68.3 (66.2, 70.4)	65.8 (63.9, 67.7)
Bias	-	−2.6 (−5.8, 0.7)
rMSE	-	8.4
ICC	-	0.98 (0.95, 0.99)*
Light (min)	143.8 (139.4, 148.3)	145.6 (141.2, 150.0)
Bias	-	1.7 (2.2, 5.7)
rMSE	-	12.3
ICC	-	0.99 (0.98, 0.99)*
Sedentary (min)	356.8 (351.3, 362.3)	357.6 (352.1, 363.1)
Bias	-	0.8 (−2.9, 4.5)
rMSE	-	11.5
ICC	-	0.99 (0.99, 1.00)*
Guideline Minutes	41.3 (39.2, 43.5)	35.9 (33.8, 37.9)
Bias	-	−5.4 (−11.9, 1.0)
rMSE	-	17.3
ICC	-	0.91 (0.83, 0.95)*
Guideline Bouts	1.8 (1.8, 1.9)	1.6 (1.5, 1.7)
Bias	-	−0.3 (−0.6, 0.0)
rMSE	-	0.7
ICC	-	0.92 (0.84, 0.96)*
Number sedentary bouts > 30 min	3.0 (2.9, 3.1)	3.3 (3.2, 3.4)
Bias	-	0.3 (0.0, 0.7)
rMSE	-	1.0
ICC	-	0.86 (0.73, 0.93)*
Number sedentary bouts > 60 min	0.9 (0.8, 0.9)	0.9 (0.9, 1.0)
Bias	-	0.0 (−0.3, 0.3)
rMSE	-	0.6
ICC	-	0.80 (0.64, 0.89)*
Minutes sedentary bouts > 30 min	169.6 (163.8, 175.4)	188.8 (182.8, 194.8)
Bias	-	18.0 (−9.8, 45.9)
rMSE	-	65.1
ICC	-	0.84 (0.71, 0.91)*
Minutes sedentary bouts > 60 min	79.4 (74.8, 84.1)	86.3 (81.7, 90.9)
Bias	-	5.6 (−20.9, 32.1)
rMSE	-	60.2
ICC	-	0.78 (0.61, 0.88)*

rMSE = root mean squared error, ICC = intraclass correlation coefficient.