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Table 1 Characteristics of the study population

From: Which disease-related factors influence patients’ and physicians’ willingness to consider joint replacement in hip and knee OA? Results of a questionnaire survey linked to claims data

Variable Missing values Hip OA n = 478 Knee OA n = 932
 Demographics Age (years), mean 0 64 (63; 65) 65 (64; 65)
Female 0 63 (58; 67) 68 (66; 70)
BMI 29 28 (27; 28) 29 (29; 30)
 Burden of OA Symptom duration (years), mean 72 14 (12; 15) 15 (14; 16)
Deterioration of symptoms
(during last 2 years)
21 62 (56; 68) 57 (53; 61)
 WOMAC WOMAC total, mean 202 42 (39; 44) 41 (39; 42)
WOMAC pain, mean 131 42 (40; 45) 42 (40; 43)
WOMAC function, mean 89 41 (38; 43) 39 (38; 41)
WOMAC stiffness, mean 89 45 (42; 48) 45 (43; 47)
 Any impact on personal situation 27 78 (73; 83) 77 (74; 81)
 WHO-5 61 50 (47; 53) 51 (49; 53)
 Treating specialist Orthopaedist is treating 12 63 (57; 69) 71 (68; 75)
  Diagnostics X-Ray of the corresponding joint 15 92 (89; 95) 91 (89; 93)
MRI of the corresponding joint 49 42 (36; 48) 55 (51; 59)
  Treatment No prescription of analgesicsa 0 42 (36; 48) 34 (31; 38)
NSAR prescriptiona 0 44 (38; 50) 51 (47; 55)
Opioid prescriptiona 0 13 (9; 18) 13 (10; 16)
Other analgetic prescriptiona 0 25 (20; 30) 29 (26; 33)
Daily use of medication 20 26 (21; 31) 22 (19; 25)
Occasional use of medication 20 46 (40; 52) 51 (47; 55)
Physical therapy prescriptiona 0 46 (40; 52) 49 (45; 53)
Having at least one artificial joint 52 23 (18; 28) 19 (16; 22)
  1. Values are percentages unless indicated otherwise. Values in brackets are 95% confidence intervals. a indicates information derived from claims data