Table 5.

NNT for at least 50% pain relief in postsurgical pain

		Improved with				Mean percent improved with
Time (hours)	Drug and dose (mg)	Active	Placebo	Relative risk (95% CI)	NNT (95% CI)	Placebo	Active
6	Rofecoxib 50 mg	43/110	7/53	3.0 (1.4 to 6.1)	3.9 (2.6 to 7.8)	13	39
	Naproxen 550 mg	20/55	7/53	2.8 (1.3 to 6.0)	4.3 (2.6 to 13)	13	36
8	Rofecoxib 50 mg	44/110	6/53	3.5 (1.6 to 7.8)	3.5 (2.4 to 6.9)	11	40
	Naproxen 550 mg	18/55	6/53	2.9 (1.2 to 6.7)	4.7 (2.7 to 16)	11	33
12	Rofecoxib 50 mg	38/110	2/53	9.2 (2.3 to 37)	3.3 (2.4 to 4.9)	4	35
	Naproxen 550 mg	14/55	2/53	6.8 (1.6 to 28)	4.6 (2.9 to 11)	4	25

Naproxen was given as the sodium salt