Table 2 Means (SD), correlations, median absolute difference, and bland altman output for each device on the constructs of steps, MVPA, TDEE and sleep

STEPS

Reference

BS

GT3X+

BS

BS

GT3X+

GT3X+

GT3X+

Reference mean (SD)

9959 (4844)

10516 (5070)

9959 (4844)

9959 (4844)

10516 (5070)

10516 (5070)

10516 (5070)

r

0.94

0.99

0.94

0.97

0.99

0.99

0.99

ICC

0.80

0.95

0.90

0.97

0.99

0.98

0.95

MAD

2551

679

1002

806

660

447

779

Range of differences

-5309 to +143

-679 to +1887

-4693 to +1804

-1978 to +2252

-2386 to +832

-970 to +1596

-890 to +1849

Bias

-2529

675

-1054

-251

-632

464

584

LoA (U)

910

2089

2288

1889

663

1799

1980

LoA (L)

-5968

-739

-4395

-2391

-1927

-871

-813

MVPA (min)

Reference

GT3X+

GT3X+

GT3X+

GT3X+

GT3X+

Reference mean (SD)

58.5 (37.6)

58.5 (37.6)

58.5 (37.6)

58.5 (37.6)

58.5 (37.6)

r

0.52

0.79

0.81

0.88

0.91

ICC

0.08

0.79

0.70

0.36

0.46

MAD

174.3

15.2

18.0

89.8

58.6

Range of differences

+77.0 to +299.3

-79.7 to +36.3

-4.7 to +96.5

+10.0 to +157.2

+1.0 to +137.2

Bias

190.4

-5.2

22.7

85.7

65.9

LoA (U)

344.9

45.3

68.2

172.1

154.9

LoA (L)

35.9

-55.8

-22.7

-0.8

-23.2

TDEE (kcal)

Reference

BS

BS

BS

BS

BS

Reference mean (SD)

3005 (569)

3005 (569)

3005 (569)

3005 (569)

3005 (569)

r

0.79

0.74

0.79

0.81

0.76

ICC

0.51

0.27

0.54

0.57

0.55

MAD

468

866

415

484

349

Range of differences

-996 to +100

=1937 to -94

-1284 to -58

-1145 to +218

-1724 to -83

Bias

-479

-898

-533

-497

-475

LoA (U)

214

-150

170

158

265

LoA (L)

-1172

-1647

-1236

-1152

-1216

SLEEP (min)

Reference

BS

BS

BS

BS

Reference mean (SD)

423.6 (73.5)

423.6 (73.5)

423.6 (73.5)

423.6 (73.5)

r

0.82

0.89

0.92

0.92

ICC

0.71

0.85

0.87

0.90

MAD

47.0

22.0

28.0

23.0

Range of differences

-61 to +125

-31 to +132

-17 to +104

-45 to +76

Bias

44.2

23.5

24.4

15.9

LoA (U)

135.3

96.2

95.2

82.9

LoA (L)

-46.9

-49.2

-46.5

-51.0