Table II.
Adult current asthma prevalence and adjusted prevalence rate by 6-level urban–rural categories in US adults aged ≥18 years—United States, 2020
| Category | No. | Prevalence, % (95% CI) | Adjusted PR, % (95% CI)† |
|---|---|---|---|
| Overall | 37366 | 9.2 (9.0-9.4) | |
| Large central metro | 5737 | 8.8 (8.4-9.3) | 1.05 (0.98-1.13) |
| Large fringe metro | 7040 | 8.6 (8.2-9.0) | Reference |
| Medium metro | 7799 | 9.7 (9.3-10.1) | 1.10 (1.04-1.17)∗ |
| Small metro | 5309 | 9.9 (9.3-10.5) | 1.11 (1.03-1.20)∗ |
| Micropolitan | 6000 | 10.2 (9.7-10.7) | 1.12 (1.04-1.19)∗ |
| Noncore | 5481 | 9.0 (8.5-9.6) | 0.98 (0.91-1.05) |
Source: Centers for Disease Control and Prevention, 2020 BRFSS. Current asthma refers to respondents with a “yes” answer to both questions: (1) Has a doctor, nurse, or other health professional ever told you that you had asthma? and (2) Do you still have asthma?
∗
Statistically significant at P ≤ .01.
†
Adjusted for sociodemographic characteristics of sex, age, race and ethnicity, educational attainment, insurance coverage, and ratio of family income to federal poverty. Categories are listed in Table I.