. 2009 Mar 30;13(2):R43. doi: 10.1186/cc7766

Table 2.

Comparison of NSAID and aspirin use by cases versus controls

Analysis		NSAID users (%)		OR (95% CI)	P value

		Cases	Controls
Global (n = 152)^a	NSAIDs and aspirin	27	28	0.93 (0.52 to 1.64)	0.79
	NSAIDs	24	21	1.18 (0.64 to 2.19)	0.56
	Chronic treatment	4	5	0.86 (0.24 to 2.98)	0.78
	Acute treatment	20	16	1.40 (0.69 to 2.92)	0.32
	Aspirin	5	10	0.47 (0.16 to 1.22)	0.09

Subgroup analysis	Diabetes (n = 20)^a
	NSAIDs	20	5	4.00 (0.40 to 196.99)	0.18
	Aspirin	10	5	2.00 (0.40 to 196.99)	0.56
	No diabetes (n = 132)^a
	NSAIDs	24	23	1.05 (0.55 to 2.00)	0.88
	Aspirin	4	11	0.36 (0.10 to 1.05)	0.04^b
	Site of infection: lung (n = 71)^a
	NSAIDs	14	15	0.90 (0.32 to 2.46)	0.82
	Aspirin	7	11	0.63 (0.16 to 2.17)	0.40
	Site of infection: urinary tract (n = 30)^a
	NSAIDs	27	30	0.83 (0.02 to 3.28)	0.76
	Aspirin	3	7	0.50 (0.01 to 9.60)	0.56
	Site of infection: skin and soft tissue (n = 16)^a
	NSAIDs	31	31	1.00 (0.07 to 13.80)	1.00
	Aspirin	0	6	- -	-
	Site of infection: other (n = 35)^a
	NSAIDs	37	20	2.50 (0.72 to 10.92)	0.11
	Aspirin	3	11	0.25 (0.01 to 2.53)	0.18

^aThe n values indicate the number of pairs. ^bThe apparent discordance between the confidence interval (CI) and statistical test results is due to the use of different but asymptotically equivalent statistical methods. NSAID, nonsteroidal anti-inflammatory drug; OR, odds ratio.