Fig. 3. Mean pain intensity (PI, categorical) scores over time for all treatment groups after oral surgery. *P < 0.001, placebo versus each dose of valdecoxib, at all time points. †P < 0.001, 40 and 80 mg valdecoxib versus 10 and 20 mg valdecoxib from 8 to 20 h. ‡P < 0.001, 40 mg valdecoxib versus 10 mg valdecoxib from 4 to 24 h. §P < 0.001, 80 mg valdecoxib versus 10 mg valdecoxib from 0.5, and 4 to 24 h. ∥P < 0.001, 80 mg valdecoxib versus 20 mg valdecoxib from 6 to 24 h.