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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