TABLE 2.
Reproducibility and Minimal Detectable Change for Gait Efficiency (GE) at Submaximal Walking Speeds
| 40% Below Nominal Speed 0.71 (0.02) m/s | 20% Below Nominal Speed 0.94 (0.03) m/s | Nominal Speed 1.18 (0.04) m/s | 20% More Than Nominal Speed 1.41 (0.05) m/s | 40% More Than Nominal Speed 1.65 (0.06) m/s | Self-Selected Walking Speed – 1.28 (0.14) m/s | |
|---|---|---|---|---|---|---|
| Gross GE (ml/kg/m) | ||||||
| Test 1 (SD) | 0.22 (0.02) | 0.19 (0.02) | 0.17 (0.01) | 0.18 (0.02) | 0.19 (0.02) | 0.17 (0.02) |
| Test 2 (SD) | 0.22 (0.02) | 0.19 (0.02) | 0.17 (0.01) | 0.18 (0.02) | 0.19 (0.02) | 0.17 (0.02) |
| ICC [CI] | .93 [.82, .97] | .84 [.62, .93] | .89 [.75, .96] | .90 [.75, .96] | .93 [.83, .97] | .89 [.74, .96] |
| CV% | 2.6 | 2.6 | 2.0 | 2.3 | 2.0 | 2.5 |
| SEM | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | .01 |
| MDC (%M) | 0.02 (8.4) | 0.02 (9.8) | 0.01 (7.8) | 0.01 (7.9) | 0.01 (6.8) | 0.02 (8.4) |
| Net GE (ml/kg/m) | ||||||
| Test 1 (SD) | 0.14 (0.02) | 0.13 (0.02) | 0.13 (0.02) | 0.14 (0.02) | 0.15 (0.02) | 0.13 (0.02) |
| Test 2 (SD) | 0.13 (0.02) | 0.12 (0.01) | 0.12 (0.01) | 0.14 (0.01) | 0.15 (0.02) | 0.13 (0.01) |
| ICC [CI] | .76 [.44, .90] | .69 [.27, .87] | .85 [.64, .94] | .85 [.64, .94] | .90 [.77, .96] | .87 [.68, .94] |
| CV% | 7.4 | 6.4 | 4.0 | 3.8 | 3.0 | 4.2 |
| SEM | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | .01 |
| MDC (%M) | 0.03 (20.3) | 0.03 (19.4) | 0.02 (12.1) | 0.02 (12.0) | 0.02 (10.0) | 0.02 (11.8) |
Note. SD = standard deviation; ICC = intraclass correlation coefficient; CI = 95% confidence interval; CV = coefficient of variation; SEM = standard error of measurement; MDC = minimum detectable change; %M = MDC expressed as a percent of measurement mean.