Fig. 2From: Safety and efficacy of curcumin versus diclofenac in knee osteoarthritis: a randomized open-label parallel-arm studyVisual analogue scale (VAS) plot: Relationship between pain relief measured by subtraction and initial pain score for curcumin and diclofenac. Correlation coefficients: curcumin, 0.5; diclofenac, 0.73Back to article page