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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 s y , 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)

From: Bias and imprecision in posture percentile variables estimated from short exposure samples

Posture variable: 10th
percentile
50th
percentile
90th
percentile
10th-90th
percentile range
Mvs 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 s y      
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]
  1. In bold: correlations for which the 95% confidence interval does not contain 0.