. 2003 Oct 31;3:28. doi: 10.1186/1471-2407-3-28

Table 8.

Bladder

Author	Cases N	Controls_a/Cohort_b	Source Population	Exposure definition	Exposure assessment	Drug	RR	95% CI
Castelao et al. [25]	1,514	1,514_a	Population based	>2 days/week for >1 month	Personal Interview	Aspirin (12%)^†	0.85	0.66–1.09
						NSAIDs (39%)	0.81	0.68–0.96
Langman et al. [36]	1,041	3,122_a	Population based	>7 prescriptions during months 13–36 before index date	Automated Database	NSAIDs (7%)	1.14	0.85–1.53
Rosenberg[56]	1,110	4,906_a	Hospital based	>3 days/week for >3 months 1.5 years of lag time	Personal Interview	NSAIDs (6%)	0.8	0.4–1.6
Paganini-Hill et al. [40]	93	13,987_b	Cohort	Daily use of aspirin for an undefined time	Mailed questionnaire	Aspirin (16%)	1.10^§	0.65–1.85
Schreinemachers et al. [43]	35	12,668_b	Cohort	Ever use of aspirin in the 30 days prior to start date	Personal Interview	Aspirin (59%)	1.06	0.54–2.09

Prevalence of exposure among controls/cohort; ^†Exclusive users of aspirin.