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Table 2 Marginal distribution of patients’ own classification of their health status based on the five attributes, each with three levels, of the EQ-5D-3 L instrument (n = 163)

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

EQ-5D-3 L attributes and levels Radbouda(n = 75) MST (n = 35) UMCG (n = 53)
Mobility
 No problems (1) 45 (60.0) 20 (57.1) 29 (54.7)
 Some problems (2) 30 (40.0) 15 (42.9) 18 (34.0)
 Confined to bed (3)    6 (11.3)
Self-care
 No problems (1) 63 (84.0) 31 (88.6) 40 (75.5)
 Some problems (2) 12 (16.0) 4 (11.4) 10 (18.9)
 Unable to (3)    3 (5.7)
Usual activities    
 No problems (1) 38 (50.7) 12 (34.3) 26 (49.1)
 Some problems (2) 34 (45.3) 21 (60.0) 24 (45.3)
 Unable to (3) 3 (4.0) 2 (5.7) 3 (5.7)
Pain/Discomfort
 No (1) 34 (45.3) 13 (37.1) 18 (34.0)
 Moderate (2) 36 (48.0) 21 (60.0) 32 (60.4)
 Extreme (3) 5 (6.7) 1 (2.9) 3 (5.7)
Depression/Anxiety
 Not (1) 59 (78.7) 25 (71.4) 36 (67.9)
 Moderately (2) 16 (21.3) 10 (28.6) 12 (22.6)
 Extremely (3)    5 (9.4)
  1. aRadboud Radboud University Nijmegen Medical Center, MST hospital Medisch Spectrum Twente, UMCG University Medical Center Groningen