Table 1.
Reliability results of single measures and means of 2, 3, 4 and 5 measures for each variable
| Variable | Mean ± SD* | ICC (95% CI) | SEM | MDD | Bias (95% CI) ± 95% LOA |
|---|---|---|---|---|---|
|
Relative weight bearing on right leg (%) |
|
|
|
|
|
| 1 repetition |
50.10 ± 2.7 |
0.44 (−0.18,0.74) |
2.0 |
5.6 |
0.3(−0.3,0.9) ±6.5 |
| 2 repetitions |
49.84 ± 2.4 |
0.65 (0.25,0.83) |
1.4 |
3.9 |
0.3(−0.2,0.7) ±4.9 |
| 3 repetitions |
49.69 ± 2.3 |
0.75 (0.47,0.88) |
1.2 |
3.2 |
0.1(−0.3,0.5) ±4.1 |
| 4 repetitions |
49.69 ± 2.3 |
0.82 (0.63,0.92) |
1.0 |
2.7 |
0.2(−0.2,0.5) ±3.6 |
| 5 repetitions |
49.64 ± 2.3 |
0.83 (0.64,0.92) |
0.9 |
2.6 |
0.3(−0.1,0.6) ±3.5 |
|
Relative weight bearing on left leg (%) |
|
|
|
|
|
| 1 repetition |
49.90 ± 2.7 |
0.44(−0.18,0.75) |
2.0 |
5.6 |
0.3(−0.3,0.9) ±6.5 |
| 2 repetitions |
50.16 ± 2.4 |
0.65 (0.27,0.85) |
1.4 |
3.9 |
0.3 (−0.2,0.7) ±4.9 |
| 3 repetitions |
50.31 ± 2.3 |
0.75 (0.49,0.89) |
1.2 |
3.2 |
0.1(−0.3,0.5) ±4.1 |
| 4 repetitions |
50.31 ± 2.3 |
0.81 (0.59-0.91) |
1.0 |
2.7 |
0.1(−0.2,0.5) ± 3.7 |
| 5 repetitions |
50.36 ± 2.3 |
0.82 (0.63-0.92) |
1.0 |
2.7 |
0.2(−0.1,0.5) ±3.5 |
|
COP mean velocity (mm/sec) |
|
|
|
|
|
| 1 repetition |
6.0 ± 4.8 |
0.19 (−0.75,0.62) |
4.4 |
12.1 |
−0.6(−1.9,0.7) ±13.50 |
| 2 repetitions |
5.6 ± 3.4 |
0.83 (0.65,0.92) |
1.3 |
3.5 |
0.2(0.1,0.4)† ±1.81 |
| 3 repetitions |
5.5 ±3.3 |
0.95 (0.90,0.98) |
0.7 |
2 |
0.2(0.0,0.5) ±2.68 |
| 4 repetitions |
5.5 ± 3.3 |
0.97 (0.94,0.99) |
0.6 |
1.6 |
0.09(−0.1,0.3) ±2.09 |
| 5 repetitions |
5.4 ± 3.2 |
0.92 (0.84,0.96) |
0.9 |
2.5 |
0.03(−0.3,0.3) ±3.43 |
|
Average location of COP (mm) |
|
|
|
|
|
| 1 repetition |
35.0 ± 21 |
0.53 (−0.01,0.78) |
14.4 |
39.7 |
−1.8(−6.2,2.6) ±47.2 |
| 2 repetitions |
38.4 ± 31.1 |
0.92 (0.84,0.96) |
8.8 |
24.4 |
−1.6(−4.7,1.5) ±33.3 |
| 3 repetitions |
37.3 ± 26.5 |
0.91 (0.81,0.96) |
8 |
22.1 |
−0.4(−3.2,2.4) ±30.2 |
| 4 repetitions |
38.8 ± 28.9 |
0.93 (0.85,0.97) |
7.7 |
21.3 |
−0.7(−3.4,2.1) ±29.8 |
| 5 repetitions |
39.0 ± 29.6 |
0.94 (0.88,0.97) |
7.3 |
22 |
−0.6(−3.2,2.0) ±27.9 |
|
Sway area (mm2) |
|
|
|
|
|
| 1 repetition |
1549.6 ± 1605.5 |
0.06(−1.02,0.56) |
1556.9 |
4302.7 |
−265.6(−686.4,155.1) ± 4517.0 |
| 2 repetitions |
1442.6 ± 1055.5 |
0.47 (−0.13,0.75) |
763.7 |
2116.8 |
−73.2 (−302.3,156.3) ±1399.0 |
| 3 repetitions |
1456.6 ± 1001.9 |
0.63 (0.28,0.82) |
612.7 |
1698.3 |
−159.2 (−350.4,32.1) ±2054.0 |
| 4 repetitions |
1440.3 ± 889.8 |
0.68 (0.33,0.85) |
504.8 |
1399.2 |
−159.2 (−278.9,43.8) ± 1732.7 |
| 5 repetitions | 1466.9 ± 918.2 | 0.83 (0.64,0.92) | 380.4 | 1054.3 | −48.6 (−178.7,81.7) ± 1399.0 |
CI confidence interval, ICC intra class correlation coefficient, LOA limit of agreement, MDD minimal detectable difference, SEM standard error of measurement
*Pooled from all repetitions;
† Statistically significant bias (different from zero);
Bold ICCs indicate acceptable reliability values.