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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