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Table 1 Baseline characteristics of the CHECK study population at baseline

From: Prevalence and development of hip and knee osteoarthritis according to American College of Rheumatology criteria in the CHECK cohort

Characteristics Participants
(n = 1002)
Knee complaintsa
(n = 829)
Hip complaintsb
(n = 588)
Women, % 79.0 79.6 80.8
Age in years (SD) 55.9 (5.2) 56.0 (5.1) 55.8 (5.3)
BMI (SD) 26.2 (4.1) 26.4 (4.1) 26.1 (4.1)
WOMAC pain (SD) 25.4 (17.2) 25.6 (17.3) 27.2 (17.1)
WOMAC function 23.5 (17.1) 24 (17.3) 25.3 (17.6)
WOMAC stiffness 33.2 (21.1) 33.8 (21.1) 34.8 (21.2)
NRS (0–10) (SD) 3.6 (2.1) 3.6 (2.1) 3.7 (2.1)
Hip pain, % 58.7 50.1 100.0
Knee pain, % 83.0 100.0 71.1
ACR clinical knee OA, (%)   674 (81.3)  
ACR combined knee OA (%)   606 (73.1)  
Clinical/combined knee OA (%)   760 (91.7)  
ACR clinical hip OA (%)    162 (27.6)
ACR combined hip OA (%)    322 (54.7)
Clinical or combined hip OA (%)    370 (62.9)
  1. SD standard deviation, NRS numeric rating scale (0–10), BMI body mass index, WOMAC Western Ontario and McMaster Universities Osteoarthritis Index scores (0–100), ACR American College of Rheumatology, OA osteoarthritis
  2. aParticipant with either knee, or knee and hip pain
  3. bParticipant with either hip, or hip and knee pain