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Table 4 Mean difference scores with the gold standards and limits of agreement of the activity trackers in the laboratory and free-living study

From: Reliability and validity of ten consumer activity trackers

  Mean difference (Optogait – tracker, lab study)a Limits of Agreement Mean difference (ActivPAL- tracker, free-living study)a Limits of Agreement
   Lower Upper   Lower Upper
ActivPAL 9 −3 21    
Lumoback 8 −31 47 17 −778 812
Fitbit Flex 188 −240 615 −150 −1424 1124
Jawbone UP 34 −54 81 −58 −1732 1618
Nike+ Fuelband 598 −613 1809 977 −1288 3240
Misfit Shine −6 −91 85 −43 −743 657
Withings Pulse 15 −31 61 323 −864 1510
Fitbit Zip 11 −12 34 −49 −482 384
Omron −82 −390 226 17 −1006 1040
Digiwalker 38 −248 323 240 −1028 1508
Moves app −319 −1037 399 1529 −1046 4104
  1. a Positive values indicate an underestimation of the activity tracker and negative values indicate an overestimation