Table 3.

Baseline characterstics of over the counter (OTC) medication use versus prescription medication use among the new users of aspirin, ibuprofen and naproxen in the Multi-Ethnic Study of Atherosclerosis: estimates of the Relative Risk (95% Confidence Interval) of starting an OTC versus a prescribed medication during follow-up

Parameter	Aspirin	Ibuprofen	Naproxen
African American Ethnicity	0.83 (0.77–0.90)	0.79 (0.69–0.91)	0.94 (0.80–1.10)
Asian Ethnicity	0.80 (0.70–0.91)	0.48 (0.27–0.87)	0.84 (0.47–1.51)
Hispanic Ethnicity	0.72 (0.66–0.82)	0.83 (0.71–0.98)	0.50 (0.35–0.70)
Smoker	1.02 (0.92–1.12)	1.00 (0.86–1.16)	1.09 (0.87–1.37)
Ex Smoker	1.01 (0.94–1.07)	1.13(1.03–1.25)	1.04 (0.89–1.20)
Male	0.92 (0.87–0.98)	0.96 (0.87–1.05)	0.98 (0.85–1.13)
Age (per 10 years)	0.96 (0.93–1.00)	0.97 (0.92–1.02)	1.00 (0.92–1.09)
BMI (per 5 kg/m2)	1.01 (0.98–1.04)	0.98 (0.94–1.04)	1.05 (0.99–1.11)
Baseline anti-hypertensive Medication use	0.95 (0.89–1.02)	0.88 (0.78–0.99)	0.92 (0.79–1.08)
Baseline lipid lowering Medication use	0.88 (0.80–0.96)	0.99 (0.86–1.14)	0.87 (0.71–1.07)
Less than High School Education	0.96 (0.85–1.07)	0.93 (0.74–1.15)	0.96 (0.80–1.13)
College Education	0.98 (0.91–1.06)	1.11 (0.98–1.25)	0.95 (0.80–1.13)
Graduate School	1.01 (0.93–1.09)	1.14 (1.02–1.27)	0.89 (0.74–1.08)
Income < $25,000	0.89 (0.81–0.97)	0.95 (0.81–1.10)	0.87 (0.70–1.08)
Income >$ 50,000 and ≤ $100,000	1.03 (0.96–1.11)	1.06 (0.94–1.19)	0.96 (0.80–1.16)
Income > $100,000	0.95 (0.86–1.05)	1.12 (0.98–1.28)	1.21 (1.01–1.43)
No Health Insurance	0.86 (0.74–1.00)	0.92 (0.73–1.18)	0.71 (0.42–1.19)
Diabetes	0.89 (0.80–0.99)	1.02 (0.84–1.25)	0.92 (0.69–1.22)
Sedentary activities (1 standard deviation)	0.99 (0.94–1.03)	1.05 (0.98–1.12)	1.04 (0.93–1.16)
Intentional exercise (1 standard deviation)	1.03 (1.01–1.05)	0.98 (0.94–1.04)	1.04 (0.96–1.13)