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Table 1 Patient-related characteristics (n = 281)

From: Evaluation of a patient decision aid for initiating disease modifying anti-rheumatic drugs

Variables Categories/range Comparison group
(n = 158)
Intervention group
(n = 123)
P a
Sociodemographic variables
 Age, years   54 ± 15 (158) 55 ± 13 (123) n.s.b
 Gender, % (n) Women 65 % (102) 61 % (75)  
Men 35 % (56) 39 % (48) n.s.
 Marital status, % (n) Married/living with partner 78 % (121) 89 % (109)  
Not married/living alone 22 % (34) 11 % (14) 0.02
 Education, % (n) Low 26 % (41) 30 % (37)  
Medium 52 % (81) 50 % (61)
High 22 % (34) 20 % (25) n.s.
 Work status, % (n) Employed/studying 67 % (82) 67 % (58)  
Not employed/not studying 33 % (41) 33 % (29) n.s.
Health-related variables
 Diagnosis, % (n) Rheumatoid arthritis 76 % (108) 81 % (91)  
Psoriatic arthritis 19 % (27) 13 % (15)
Ankylosing spondylitis 5 % (7) 6 % (7) n.s.
 Years since diagnosis, % (n) <1 37 % (58) 25 % (31)  
1–5 34 % (52) 41 % (50)
6–10 10 % (16) 12 % (14)
>10 19 % (29) 22 % (27) n.s.
 Pain (NRS) Range 0–10 4.7 ± 2,4 (158) 4.7 ± 2,5 (123) n.s.b
 Physical function (HAQ-II) range 0–3 2.17 ± 0.57 (155) 2.13 ± 0.57 (120) n.s.b
Preference-related variables
 Preferred role in decision-making (CPS), % (n) (Mostly) doctor 15 % (23) 8 % (10)  
Shared 76 % (119) 77 % (94)
(Mostly) patient 9 % (14) 15 % (18) n.s.
 Need for information (CPQ) range 1–5 4.4 ± 0.8 (154) 4.5 ± 0.7 (121) n.s.b
  1. Values are the mean ± standard deviation (number) unless otherwise indicated. Percentages do not include missing cases. aTested using the Pearson chi-square test unless otherwise indicated. bTested using the t test. n.s. not significant (p > 0.05), NRS numerical rating scale, HAQ-II Health Assessment Questionnaire, version 2 [28], CPS Control Preference Scale [5, 29], CPQ Cologne Preference Questionnaire [30, 31]