Table 2. Prevalence of Aspirin Use and Association Between Aspirin Use and Myocardial Infarction Risk Factors Among Men Aged 45 to 79 Years in North Carolina (n = 1,564), BRFSS, 2013.
| Subgroup | na | Weightedb Prevalence (%) of Aspirin Use (95% CI) | Prevalence Ratio (95% CI) |
|---|---|---|---|
| Overall sample | 1,564 | 41.2 (38.1–44.4) | — |
| Risk of myocardial infarctionc | |||
| Low risk | 382 | 31.0 (25.0–37.0) | 1.0 [Reference] |
| High risk | 1,182 | 44.8 (41.0–48.5) | 1.44 (1.17–1.78) |
| History of hypertension | |||
| No | 766 | 36.2 (31.8–40.6) | 1.0 [Reference] |
| Yes | 798 | 46.6 (42.0–51.2) | 1.29 (1.10–1.50) |
| History of diabetes | |||
| No | 1,295 | 39.1 (35.7–42.6) | 1.0 [Reference] |
| Yes | 267 | 52.2 (44.1–60.4) | 1.33 (1.12–1.59) |
| Current smoking | |||
| No | 1,246 | 43.0 (39.4–46.6) | 1.0 [Reference] |
| Yes | 296 | 36.0 (28.9–43.1) | 0.84 (0.68–1.04) |
| History of high cholesterol | |||
| No | 711 | 37.2 (32.6–41.8) | 1.0 [Reference] |
| Yes | 712 | 46.7 (41.9–51.6) | 1.26 (1.07–1.48) |
Abbreviations: BRFSS, Behavioral Risk Factor Surveillance System; CI, confidence interval.
a
Totals for some subcategories do not add to overall sample size (1,564) because of missing data.
b
Prevalence estimates are weighted to the overall population of men aged 45 to 79 in North Carolina using precalculated complex weight variables that are included in the BRFSS dataset.
c
Level of risk was dichotomized as high (≥1 risk factor) or low (no risk factors). Risk factors were hypertension, diabetes, smoking, and high cholesterol.