Concordance of baseline pain measures (across two reporting instruments) influences treatment effect: post hoc analysis of a phase 3 randomized controlled trial of triamcinolone acetonide extended-release in patients with knee osteoarthritis. Issue 1 (April 2020) - Conaghan, P.G.; Ross, E.; Kivitz, A.; Turk, D.C.; Spitzer, A.I.; Jones, D.G.; Lanier, R.; Cinar, A.; Lufkin, J.; Kelley, S.D.