International Journal of Rheumatology / 2016 / Article / Tab 1

Research Article

Validation of Administrative Osteoarthritis Diagnosis Using a Clinical and Radiological Population-Based Cohort

Table 1

Percentage of knee, hand, and hip osteoarthritis (OA) by each reference standard, knee OA assessment, and other baseline characteristics of 171 subjects who underwent comprehensive clinical assessment for knee OA by sex.

CharacteristicsWomen%
Men%
value

Reference standards
 RS177.457.5<0.01
 RS282.156.3<0.01
 RS396.489.70.08
 RS484.562.1<0.01

Knee OA assessment
 Clinical ACR criteria48.840.20.26
 K-L grade ≥ 242.944.90.79
 MRI cartilage score ≥ 291.788.50.48
 Self-report50.048.30.82

Other characteristics
 Age in years0.44
  40–4914.321.8
  50–6451.246.0
  65–7934.532.2
 Body mass index (kg/m2)0.02
  18.5–24.946.328.7
  25.0–29.927.446.0
  30+26.225.3
 Hip pain42.918.4<0.01
 Symptomatic hand OA43.418.4<0.01

RS1, RS2, RS3, and RS4 are four reference standards including knee, hand, and hip OA which are described in Methods.
K-L = Kellgren-Lawrence, self-report = self-reported physician diagnosed knee OA, MRI = magnetic resonance imaging, and ACR = American College of Rheumatology.

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