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Table 3 Risk factors associated knee pain in advanced radiographic knee OA in three study subjects

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

Variables HAS(N = 47) KNHANES(N = 685) OAI(N = 554)
  Unadjusted OR
(95% CI)
Adjusted OR
(95% CI)
Unadjusted OR
(95% CI)
Adjusted OR
(95% CI)
Unadjusted OR
(95% CI)
Adjusted OR
(95% CI)
Age 0.91(0.81–1.02) NAc 0.91(0.81–1.02) 0.91(0.86–0.95) 0.91(0.86–0.95)
Female 5.17(1.13–23.55) NAc 3.16(1.81–5.55) 3.16(1.81–5.55) 0.86(0.42–1.73)
Diabetes 1.25(0.13–12.51) NAc 1.3(0.85–2) 0.7(0.24–2.09)
CVA NAa NAc 2.33(0.79–6.9) 1.06(0.14–8.25)
MI NAa NAc 1.14(0.54–2.43) 0.6(0.07–4.82)
Hyperlipidemia NA NAc 1.57(0.96–2.56) NA
Osteoporosis 3.85(0.43–34.06) NAc 2.3(1.29–4.09) 0.4(0.17–0.93)
BMI 1(0.86–1.17) NAc 1.01(0.97–1.06) 1.03(0.95–1.11)
Smoker 1.5(0.27–8.27) NAc 0.56(0.38–0.83) 1.65(0.79–3.44)
Alcohol 0.76(0.2–2.98) NAc 0.88(0.63–1.24) 1.29(0.54–3.08)
Low education NAb NAc 3.04(1.73–5.34) 1.57(0.21–11.96)
Low income 0.73(0.15–3.46) NAc 1.22(0.82–1.82) 0.57(0.24–1.33)
Marriage 0.76(0.2–2.98)   1(0.72–1.38) 0.88(0.35–2.21)
  1. aAmong subjects without pain, none had this condition. bAmong subjects without pain, all had low education level. c In HAS groups, because there were so few subjects, adjustment analysis was not possible. For Adjust in KNHANES and OAI, we used logistic regression analysis with the backward selection method. CVA Cerebrovascular accident, MI Myocardial infarction, BMI Body mass index