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Table 5 Convergent and discriminant validity of QLQ-CLL17 (correlation coefficient)

From: Validation of the Chinese EORTC chronic lymphocytic leukaemia module – application of classical test theory and item response theory

  WF SB PC
EQ-5D-5 L
 Mobility 0.242*** 0.435*** 0.413***
 Self-care 0.202*** 0.292*** 0.314***
 Usual activities 0.268*** 0.410*** 0.397***
 Pain/discomfort 0.298*** 0.473*** 0.412***
vAnxiety/depression 0.573*** 0.440*** 0.439***
 Utility −0.457*** − 0.569*** − 0.549***
QLQ-C30a
 Global health status −0.446*** − 0.537*** − 0.577***
Functional scales
 Physical functioning −0.405*** −0.633*** − 0.655***
 Role functioning −0.41*** − 0.55*** − 0.563***
 Emotional functioning − 0.634*** − 0.583*** − 0.568***
 Cognitive functioning − 0.511*** − 0.614*** − 0.601***
 Social functioning − 0.638*** −0.53*** − 0.564***
Symptom scales
 Fatigue 0.475*** 0.679*** 0.713***
 Nausea and vomiting 0.243*** 0.444*** 0.414***
 Pain 0.397*** 0.65*** 0.538***
 Dyspnoea 0.424*** 0.645*** 0.652***
 Insomnia 0.437*** 0.488*** 0.491***
 Appetite loss 0.393*** 0.536*** 0.524***
 Constipation 0.204*** 0.38*** 0.367***
 Diarrhea 0.164*** 0.285*** 0.243***
 Financial difficulties 0.55*** 0.461*** 0.419***
QLQ-CLL17
 WF 1.00 0.477*** 0.544***
 SB   1.00 0.734***
 PC    1.00
  1. SB symptom burden, PC physical condition/fatigue, WF Worries/fears about health and functioning
  2. aThe score or global health status and functional scales of QLQ-C30 and utility of EQ-5D-5 L were reversed: a higher score means a better status and a lower score means a worse status
  3. * p< 0.05; ** p< 0.01; *** p< 0.001