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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

VariableMissing valuesHip OA n = 478Knee OA n = 932
 DemographicsAge (years), mean064 (63; 65)65 (64; 65)
Female063 (58; 67)68 (66; 70)
BMI2928 (27; 28)29 (29; 30)
 Burden of OASymptom duration (years), mean7214 (12; 15)15 (14; 16)
Deterioration of symptoms
(during last 2 years)
2162 (56; 68)57 (53; 61)
 WOMACWOMAC total, mean20242 (39; 44)41 (39; 42)
WOMAC pain, mean13142 (40; 45)42 (40; 43)
WOMAC function, mean8941 (38; 43)39 (38; 41)
WOMAC stiffness, mean8945 (42; 48)45 (43; 47)
 Any impact on personal situation2778 (73; 83)77 (74; 81)
 WHO-56150 (47; 53)51 (49; 53)
 Treating specialistOrthopaedist is treating1263 (57; 69)71 (68; 75)
  DiagnosticsX-Ray of the corresponding joint1592 (89; 95)91 (89; 93)
MRI of the corresponding joint4942 (36; 48)55 (51; 59)
  TreatmentNo prescription of analgesicsa042 (36; 48)34 (31; 38)
NSAR prescriptiona044 (38; 50)51 (47; 55)
Opioid prescriptiona013 (9; 18)13 (10; 16)
Other analgetic prescriptiona025 (20; 30)29 (26; 33)
Daily use of medication2026 (21; 31)22 (19; 25)
Occasional use of medication2046 (40; 52)51 (47; 55)
Physical therapy prescriptiona046 (40; 52)49 (45; 53)
Having at least one artificial joint5223 (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