Fig 2. Distribution of numeric rating scale knee pain intensity (0–100) at baseline, 3 and 6 months (n = 71 in resveratrol group and n = 71 in placebo group at baseline, n = 67 and n = 68 at 3 months, n = 60 and n = 66 at 6 months).

The scale is an 11-point numeric rating scale in 10-point increments (0, no pain, to 100, maximal pain).