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Table 4 Mean differences (SE) and Mean Absolute Percent Errors of SED and MVPA between GT3X+ and Fitbit

From: Concurrent validity of the Fitbit for assessing sedentary behavior and moderate-to-vigorous physical activity

Intensity

Comparison

Mean Difference (SE)

95% CI

P-value

MAPE (SD)

SEDa (min/day)

Freedson/Troiano - Fitbit

−37.4 (5.1)

−27.2, − 47.6

0.21

6.8% (5.5)

MVPAb (min/day)

Freedson - Fitbit

−77.7 (23.9)

−88.4, −66.4

< .0001

73.0% (13.0)

 

Troiano - Fitbit

−79.1 (24.3)

−89.9, −67.8

< .0001

74.3% (12.8)

 

VM3 - Fitbit

−59.7 (20.6)

−70.7, 48.7

< .0001

56.6% (14.6)

 

Freedson - Troiano

1.4 (4.2)

−9.4, 12.3

0.99

6.7% (5.7)

 

Freedson – VM3

−18.0 (4.2)

−28.9, −7.2

< .0001

39.1% (6.5)

 

Troiano – VM3

−19.5 (4.2)

−30.3, −8.6

< .0001

42.3% (18.9)

  1. aSED sedentary behavior, bMVPA moderate-to-vigorous physical activity, MAPE Mean absolute percent error
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BMC Medical Research Methodology

ISSN: 1471-2288

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