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Table 2 Comparison of clinical characteristics of advanced radiographic knee OA subjects in three study groups

From: Absence of pain in subjects with advanced radiographic knee osteoarthritis

  HAS KNHANES OAI
Variables Without pain
(N = 11)
With pain
(N = 36)
P value Without pain
(N = 214)
With pain
(N = 471)
P value Without pain
(N = 33)
With pain
(N = 521)
P value
Age (years), means ± SD 76.8 ± 8.9 72.3 ± 6.8 0.09 72.2 ± 8.0 72.2 ± 7.8 0.71 70.3 ± 7.6 64.2 ± 8.7 <.0001
Female 54.5 86.1 0.03 77.1 87.9 0.0003 48.5 52.4 0.66
Diabetes 9.0 11.1 0.85 15.8 19.7 0.23 12.5 9.1 0.52
CVA 0 5.5 0.42 1.8 4.2 0.12 3.1 3.3 0.95
MI 0 5.5 0.42 4.6 5.3 0.73 3.2 1.9 0.63
Hyperlipidemia 0 0 NA 11.2 16.5 0.07 NA NA NA
Osteoporosis 9.0 27.7 0.2 14.2 27.6 0.0041 24.2 11.4 0.03
BMI (kg/m2),
means ± SD
26.3 ± 3.8 26.3 ± 4.6 0.98 25.0 ± 3.8 25.2 ± 3.8 0.58 29.2 ± 4.1 29.8 ± 4.5 0.5
Smoker 18.1 25.0 0.64 25.8 16.2 0.0033 37.5 49.7 0.18
Alcohol 45.4 38.8 0.7 63.3 60.4 0.47 78.1 82.2 0.56
Low education 100 94.4 0.42 85.9 94.9 <.0001 96.9 95.2 0.66
Low income 66.6 59.3 0.69 78.2 81.3 0.33 80.6 78.6 0.79
Marriage 45.4 38.8 0.7 53.7 53.7 0.1 78.1 66.8 0.19
  1. All data are presented as percentages unless specified otherwise. Continuous variables were tested using two sample t-test and categorical variables using chi-square test. CVA Cerebrovascular accident, MI Myocardial infarction, BMI Body mass index