Fig. 2

Spinal pain by visual analogue scale (VAS 0–100 mm): analysis of subgroups of four randomized clinical trials of patients with ankylosing spondylitis (n=1199). Meta-analyses comparing traditional NSAIDs versus placebo, selective COX-2 inhibitors versus placebo, and both NSAID subtypes versus placebo. Subtitle: (1) Ximoprofen 30 mg vs placebo. (2) Meloxicam 15 mg vs placebo. (3) Piroxicam 20 mg vs placebo. (4) Ketoprofen 200 mg vs placebo. (5) Naproxen 1000 mg vs placebo. (6) Celecoxib 200 mg vs placebo. (7) Etoricoxib 90 mg vs placebo