Table 3.
Statistical analyses for the measurement agreement of metabolic equivalents for indirect calorimetry and the thigh-accelerometer (TAMETs)
| Equivalence testinga | Bland-Altman analysisb | ||||||
|---|---|---|---|---|---|---|---|
| Activity | n | 90% CI TAMETs | Equivalence zone IC | p-value | Mean bias (%) | 95% LoA | Slope p-value |
| TV | 56 | 1.25 – 1.25 | 0.98 – 1.20 | 0.992 | -14.50 | -39.13 – 10.12 | 0.0001 |
| Computer game | 56 | 1.25 – 1.26 | 1.02 – 1.24 | 0.715 | -11.80 | -42.58 – 18.99 | 0.0001 |
| Handheld e-game | 55 | 1.25 – 1.25 | 1.07 – 1.31 | 0.011 | -6.00 | -34.00 – 22.06 | 0.0001 |
| Writing/coloring | 55 | 1.25 – 1.25 | 1.14 – 1.40 | 0.000 | 0.61 | -29.64 – 30.86 | 0.0001 |
| Standing activity | 56 | 1.41 – 1.42 | 1.35 – 1.65 | 0.011 | 4.21 | -23.21 – 31.63 | 0.0001 |
| Getting ready | 56 | 2.17 – 2.23 | 2.24 – 2.74 | 0.752 | 10.86 | -25.34 – 47.06 | 0.0001 |
| Slow walk | 56 | 3.91 – 4.01 | 2.61 – 3.19 | 1.000 | -32.02 | -64.93 – 0.89 | 0.0001 |
| Dancing | 55 | 2.66 – 2.80 | 2.78 – 3.40 | 0.684 | 9.24 | -33.03 – 51.50 | 0.0001 |
| Brisk walk | 56 | 4.09 – 4.17 | 3.04 – 3.72 | 1.000 | -21.24 | 17.36 – 12.77 | 0.0001 |
| Tidy up | 55 | 2.93 – 3.02 | 3.21 – 3.93 | 0.979 | 15.82 | -25.61 – 57.24 | 0.0001 |
| Basketball | 54 | 3.45 – 3.57 | 5.00 – 6.12 | 1.000 | 43.88 | 18.36 – 79.87 | 0.0001 |
| Running | 56 | 3.79 – 3.96 | 5.11 – 6.25 | 1.000 | 35.35 | -6.41 – 77.11 | 0.0001 |
| Locomotor course | 54 | 3.70 – 3.77 | 5.11 – 6.25 | 1.000 | 44.92 | 5.00 – 84.83 | 0.0001 |
| Soccer | 55 | 3.67 – 3.80 | 5.60 – 6.84 | 1.000 | 47.26 | 9.29 – 85.22 | 0.0001 |
Notes: LoA, limits of agreement; CI, confidence interval; IC, indirect calorimetry.
a
95% equivalence test for TAMETs. Methods are equivalent if 90% confidence intervals lie entirely within the equivalence region of indirect calorimetry.
b
Mean bias was calculated as: measured METs – TAMETs; a positive value indicates underestimation of TAMETs; a negative value indicates overestimation TAMETs.