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Table 1 Characteristics and evaluation assessment of the study population (n = 163)

From: A preference-based item response theory model to measure health: concept and mathematics of the multi-attribute preference response model

  Radbouda(n = 75) MST (n = 35) UMCG (n = 53)
Mean Age, yrs. (sd) 63.6 (9.4) 53.0 (21.4) 48.3 (17.8)
Gender (%)
 Female 36 (50.0) 20 (57.1) 27(50.9)
 Male 36 (50.0) 15 (42.9) 26 (49.1)
Diagnosis (%)
 Liver transplant    15 (28.3)
 Liver-related disease?    27 (50.9)
 CVA   13 (37.1)  
 IBD   22 (62.9)  
 Cancer 48 (64.0)   
 RA 27 (36.0)   
 Paraplegic    9 (17.0)
 Other/Unknown    2 (3.8)
Education (%)
 Lower 41 (54.7) 6 (17.1) 19 (35.8)
 Middle 15 (20.0) 19 (54.3) 6 (11.3)
 Upper 19 (25.3) 10 (28.6) 20 (37.7)
 Other    8 (15.1)
Mean EQ VAS (sd) 75.2 (14.7) 68.5 (13.5) 72.1 (17.5)
Difficulty assessment (%)
 Very easy 10 (28.6) 9 (17.0)
 Easy 16 (45.7) 17 (32.1)
 Neutral 5 (14.3) 20 (37.7)
 Difficult 2 (5.7) 6 (11.3)
 Very difficult 2 (5.7) 1 (1.9)
  1. aRadboud = Radboud University Nijmegen Medical Center,
  2. MST hospital Medisch Spectrum Twente, UMCG University Medical Center Groningen