question: Compared to placebo what was the result of etoricoxib 90 mg once daily on , or naproxen 500 mg twice daily?
context:  The most common reason for discontinuation was lack of efficacy, and significantly more patients discontinued due to lack of efficacy in the placebo group than in the etoricoxib and naproxen group (25.2%, 12.5%, 10.5%, respectively, p<0.001 vs placebo)