Table 1.
Spearman's rank correlation coefficients [95% confidence intervals] between the true full-shift exposure value M and the bias B, and between M and the sample standard deviation sy, for each of the seven sampling durations (5, 10, 20, 40, 60, 120, 240 min) and each of the four posture variables (10th, 50th, 90th percentiles, 10th-90th percentile range)
| Posture variable: | 10th percentile |
50th percentile |
90th percentile |
10th-90th percentile range |
|
|---|---|---|---|---|---|
| M vs B | |||||
| Sampling duration, minutes | 5 |
0.64 [0.48;0.76] |
0.02 [-0.21;0.25] |
-0.65 [-0.76; -0.49] |
-0.66 [-0.77; -0.51] |
| 10 |
0.61 [0.45;0.74] |
0.03 [-0.20;0.26] |
-0.49 [-0.65; -0.29] |
-0.58 [-0.71; -0.40] |
|
| 20 |
0.56 [0.38;0.70] |
0.08 [-0.15;0.31] |
-0.27 [-0.47; -0.04] |
-0.42 [-0.59; -0.21] |
|
| 40 |
0.53 [0.34;0.68] |
0.30 [0.07;0.49] |
-0.17 [-0.38;0.06] |
-0.28 [-0.48;-0.06] |
|
| 60 |
0.56 [0.38;0.70] |
0.28 [0.05;0.48] |
-0.10 [-0.32;0.14] |
-0.19 [-0.40;0.04] |
|
| 120 |
0.57 [0.39;0.70] |
0.36 [0.15;0.55] |
-0.02 [-0.25;0.21] |
-0.07 [-0.29;0.17] |
|
| 240 |
0.44 [0.23;0.61] |
0.43 [0.23;0.60] |
0.09 [-0.14;0.32] |
0.01 [-0.22;0.24] |
|
| M vs sy | |||||
| Sampling duration, minutes | 5 |
0.70 [0.56;0.80] |
0.65 [0.50;0.77] |
0.77 [0.65;0.85] |
0.67 [0.52;0.78] |
| 10 |
0.70 [0.56;0.80] |
0.66 [0.51;0.77] |
0.73 [0.60;0.82] |
0.62 [0.46;0.75] |
|
| 20 |
0.72 [0.58;0.81] |
0.59 [0.42;0.72] |
0.71 [0.57;0.81] |
0.60 [0.43;0.73] |
|
| 40 |
0.68 [0.54;0.79] |
0.53 [0.34;0.68] |
0.72 [0.58;0.81] |
0.63 [0.46;0.75] |
|
| 60 |
0.66 [0.51;0.77] |
0.52 [0.32;0.67] |
0.70 [0.57;0.80] |
0.63 [0.47;0.75] |
|
| 120 |
0.64 [0.48;0.76] |
0.47 [0.27;0.63] |
0.67 [0.52;0.78] |
0.55 [0.37;0.70] |
|
| 240 |
0.57 [0.39;0.71] |
0.40 [0.19;0.58] |
0.44 [0.23;0.61] |
0.36 [0.15;0.55] |
|
In bold: correlations for which the 95% confidence interval does not contain 0.