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Table 4 Spearman correlation coefficients for different measures of illness severity for different groups

From: Health utilities for chronic low back pain

Group HU

VAS
HU

Own WTP
HU

Insurance WTP
VAS

Own WTP
VAS

Insurance WTP
Own WTP

Insurance WTP
Healthy (n = 126) −.53*** −.29*** −.15 .22* .20* .67***
Low Back Pain (n = 32) −.31+ −.20 −.10 −.11 −.04 .73***
Total (n = 156) −.50*** −.30*** −.15+ .18* .16* .68***
  1. HU Health Utilities, VAS 100 mm Visual Analogue Scale Values, WTP Willingness to Pay, + = p < .01, * = p < .05, ** = p < .01, *** = p < .001