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Table 4 Spearman correlation coefficient between measures

From: Psychometric validation of the EuroQoL 5-dimension (EQ-5D) questionnaire in patients with spondyloarthritis

  ODI score HADS score EQ-5D VAS score EQ-5D-5 L score BASFI BASMI BASDAI ASDAS-CRP
Depression Anxiety Total
SF-36
 Physical functioning − .808a − .490a − .365a − .466a .546a .722a − .771a − .420a − .609a − .620a
 Role physical − .722a − .535a − .522a − .562a .547a .701a − .581a − .243a − .557a − .536a
 Role emotional − .623a − .616a − .574a − .638a .472a .619a − .501a − .209a − .555a − .480a
 Vitality − .622a − .628a − .565a − .635a .541a .557a − .495a − 0.130 − .574a − .467a
 Emotional well-being − .433a − .734a − .737a − .794a .363a .468a − .344a − 0.092 − .400a − .284a
 Social functioning − .638a − .690a − .667a − .726a .521a .618a − .521a − .189* − .522a − .465a
 Bodily pain − .788a − .412a − .398a − .438a .533a .725a − .611a − .223a − .744a − .695a
 General health − .532a − .501a − .541a − .556a .484a .505a − .469a −.168* − .483a − .496a
 PCS − .815a − .389a − .347a − .395a .569a .723a − .711a − .352a − .660a − .696a
 MCS − .486a − .737a − .750a − .796a .426a .501a − .382a − 0.107 − .459a − .344a
EQ-5D-5 L score − .794a − .538a − .466a − .539a .584a NA − .693a − .237a − .718a − .599a
  Back pain duration Psoriasis duration   Tender joints   Swollen joints Dactylitis score Enthesitis score CRP ESR
SF-36
 Physical functioning − 0.107 − 0.262 − .220a − 0.062 0.011 − 0.152 − .203a − .158b
 Role physical 0.038 − 0.145 − .173b − 0.046 0.070 − 0.129 − 0.075 −0.099
 Role emotional − 0.098 − 0.280 − .169b − 0.096 0.053 −0.054 − 0.040 −0.004
 Vitality − 0.077 − 0.203 − 0.006 − 0.030 0.118 − 0.050 − 0.097 −0.026
 Emotional well-being − 0.144 − 0.465 − 0.066 − 0.098 0.009 0.010 0.001 0.021
 Social functioning − 0.066 − 0.289 − 0.148 − 0.057 0.026 − 0.033 − 0.016 0.026
 Bodily pain − 0.010 − 0.191 − .274a − 0.147 − 0.033 − .179b − 0.031 0.042
 General health 0.008 − 0.329 − 0.061 − 0.071 0.018 − 0.025 − .179b − 0.028
 PCS 0.075 − 0.181 − .214a − 0.085 0.014 − .185b − .203b − 0.114
 MCS − 0.115 − 0.302 − 0.035 − 0.093 0.072 0.006 − 0.034 0.047
EQ-5D-5 L score − 0.046 − 0.353 − .177a − 0.118 − 0.058 − 0.129 − 0.118 − 0.076
  1. aCorrelation is significant at the 0.01 level (two-tailed)
  2. bCorrelation is significant at the 0.05 level (two-tailed)
  3. SF-36 Short-Form 36-item questionnaire, PCS physical component score, MCS mental component score, EQ-5D-5 L EuroQol 5-dimension 5-level questionnaire, ODI Oswestry Disability Index, HADS Hospital Anxiety and Depression Scale, EQ-5D EuroQol 5-dimension, VAS visual analogue scale, BASFI Bath Ankylosing Spondylitis Functional Index, BASMI Bath Ankylosing Spondylitis Metrology Index, BASDAI Bath Ankylosing Spondylitis Disease Activity Index, ASDAS-CRP Ankylosing Spondylitis Disease Activity Score (C-reactive protein), ESR erythrocyte sedimentation rate