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Table 5 Spearman's rank correlation between the Brief Pain Inventory average pain intensity score with three severity levels according to variations in cutpoints (CPA) and corresponding scales of the SF-36 and WOMAC questionnaires for patients with OA of the hip or knee

From: Cutpoints for mild, moderate and severe pain in patients with osteoarthritis of the hip or knee ready for joint replacement surgery

  Patients with OA of the hip Patients with OA of the knee
  WOMAC pain
n = 221
SF-36 Bodily pain
n = 224
WOMAC pain
n = 93
SF-36 Bodily pain
n = 94
CPA 3,5 0.53 -0.51 0.49 -0.42
CPA 3,6 0.60 -0.54 0.50 -0.43
CPA 3,7 0.53 -0.48 0.50 -0.38
CPA 4,5 0.53 -0.50 0.51 -0.44
CPA 4,6 0.61 -0.54 0.54 -0.47
CPA 4,7 0.56 -0.49 0.57 -0.46
CPA 5,6 0.57 -0.54 0.51 -0.45
CPA 5,7 0.56 -0.53 0.54 -0.44
  1. For all correlations, p < 0.001
  2. Optimal cut-offs are bold-faced