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Table 2 Inter-scale comparisons of five categories VAS versus VRS.

From: Lack of interchangeability between visual analogue and verbal rating pain scales: a cross sectional description of pain etiology groups

  Unbiased VAS vs VRS Equidistant VAS vs VRS   
Pain etiology group PA (%) MA PA (%) MA RP (95% CI) RC (95% CI)
All, n = 81 73 0.93 44 0.96 0.18
(0.07 to 0.28)
0.43
(0.33 to 0.53)
Chron/idiop,
n = 30
67 0.95 60 0.99 0.06
(-0.07 to 0.20)
0.27
(0.12 to 0.42)
Nociceptive,
n = 31
77 0.90 29 0.91 0.44
(0.27 to 0.61)
0.56
(0.29 to 0.83)
Neuropathic,
n = 19
58 0.86 42 0.96 -0.02
(-0.25 to 0.21)
0.36
(0.08 to 0.64)
  1. Chron/idiop = Chronic/Idiopathic; PA = Percentage Agreement; MA = Monotonic Agreement; RP = Relative Position; RC = Relative Concentration; CI = Confidence Interval