Figure 4

Repeatability of Clothes Peg Algometry. a illustrates the test-retest reliability of the clothes peg test at the middle finger. b illustrates the test-retest reliability of the clothes peg test at the ear lobe. Both plots reflect the statistical agreement between the two clinical measurements following the Bland Altman technique [11]. Test-retest difference was not related to pain intensity. The null line stands for identical test and retest values. According to the British Standards Institution, at least 95% of the differences between test and retest are expected to be within two standard deviations from the null line to assume good repeatability http://www.bsigroup.com. All methods of measurement fulfilled this criterion; 100% of the differences were within these limits (maximum and minimum distances from the null line are indicated). In addition, no linear relation between pain intensity and test-retest difference was visible.