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Table 3 Correlations between baseline WOMAC scores, composite WOMAC scores and change in joint-space width (JSW) at year two

From: Identification of pain categories associated with change in pain in patients receiving placebo: data from two phase 3 randomized clinical trials in symptomatic knee osteoarthritis

Variables   WOMAC Q1 WOMAC Q2 WOMAC Q3 WOMAC Q4 WOMAC Q5 WOMAC Weight-bearing WOMAC idle Total WOMAC pain score
adj unadj adj unadj adj unadj adj unadj adj unadj adj unadj adj unadj adj unadj
Target chg in JSW yr. 2 Spearman −0.03 − 0.01 − 0.10 −0.08 − 0.05 −0.03 0.00 0.00 0.04 0.05 −0.04 −0.02 − 0.02 −0.02 − 0.04 −0.02
P 0.40 0.70 0.006 0.03 0.27 0.36 0.98 0.90 0.29 0.15 0.31 0.59 0.54 0.62 0.33 0.60
N 771 771 771 771 771 771 771 771 771 771 771 771 771 771 771 771
Non Target chg in JSW yr. 2 Spearman 0.07 0.09 0.06 0.09 0.01 0.03 0.06 0.07 0.08 0.10 0.08 0.10 0.04 0.05 0.07 0.09
P 0.07 0.02 0.09 0.02 0.71 0.40 0.10 0.05 0.02 0.007 0.03 0.007 0.27 0.14 0.05 0.01
N 733 733 733 733 733 733 733 742 733 742 733 739 733 733 733 733
  1. “Unadj” refers to unadjusted data. “Adj” is adjusted for Kellgren-Lawrence grade and Body Mass Index. Correlations with a p-value < 0.05 are highlighted in bold. WOMAC Western Ontario and McMaster’s Universities Arthritis Index