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Table 2 Group means of upper arm elevations during work for the simplified and the standard reference analyses

From: Self-recordings of upper arm elevation during cleaning – comparison between analyses using a simplified reference posture and a standard reference posture

  Simplified reference analysis Standard reference analysis  
Mean (range) Mean (range) p-value
Percentile (°)
 1st 5 (2 – 8) 5 (2 – 10) 0.68
 10th 14 (7 – 21) 13 (8 – 20) 0.98
 50th 30 (20 – 47) 30 (22 – 38) 0.98
 90th 64 (45 – 91) 64 (50 – 86) 0.95
 99th 109 (88 – 132) 110 (94 – 134) 0.30
Percentage of time
 > 30° 49 (27 – 78) 49 (34 – 63) 0.95
 > 60° 13 (4 – 35) 12 (5 – 24) 0.95
 > 90° 4 (1 – 10) 3 (1 – 8) 0.98
  1. Group means (°) for the simplified reference analysis and the standard reference analysis at the 1st, 10th, 50th, 90th and 99th percentiles of upper arm elevation and the percentage of time above 30°, 60° and 90° for the 28 subjects during work. P-values for difference calculated with Wilcoxon signed rank tests