The role of income in reducing racial and ethnic disparities in emergency room and urgent care center visits for asthma-United States, 2001-2009

Abstract

Objective: To examine racial/ethnic disparities and associated factors in asthma-related emergency room (ER) and urgent care center (UCC) visits among US adults and determine whether disparities vary across increasing income strata.

Methods: We analyzed data from 238,678 adult respondents from the 2001 to 2009 National Health Interview Survey and calculated the weighted annual prevalence of an ER/UCC visit for persons with current asthma. We used logistic regression to calculate adjusted odds ratios (AORs) for asthma-related ER/UCC visits by race/ethnicity and income, adjusting for demographics, socioeconomic, and other health-related factors.

Results: The average annual prevalence of asthma-related ER/UCC visits among adults with current asthma was highest for Puerto Ricans (24.8%, 95% confidence interval [CI]: 20.3-29.9) followed by non-Hispanic American Indian/Alaskan Natives (22.1%, 95% CI: 14.4-32.4), non-Hispanic blacks (20.4%, 95% CI: 18.5-22.4), other Hispanics (17.3%, 95% CI: 15.0-19.9), Asians (11.0%, 95% CI: 7.8-15.4), and non-Hispanic whites (10.1%, 95% CI: 9.4-10.9). Puerto Ricans (AOR: 2.01; 95% CI: 1.54-2.62), non-Hispanic blacks (AOR: 1.72; 95% CI: 1.46-2.03), and other Hispanics (AOR: 1.55; 95% CI: 1.25-1.92) with current asthma had significantly higher odds of an asthma-related ER/UCC visit than non-Hispanic whites. Lower socioeconomic status, obesity, and serious psychological distress were also associated with higher odds of asthma-related ER/UCC visits. Puerto Ricans with the lowest income (AOR: 3.52; 95% CI: 2.27-5.47), non-Hispanic American Indian/Alaskan Natives with the highest income (AOR: 5.71; 95% CI: 1.48-22.13), and non-Hispanic blacks in every income stratum had significantly higher odds of asthma-related ER/UCC visits compared to non-Hispanic whites in the highest income stratum.

Conclusions: Racial/ethnic disparities in asthma-related ER/UCC visits persist after accounting for income and other socioeconomic factors. Further research is needed to identify modifiable risk factors directly associated to race/ethnicity to decrease the asthma burden on minority populations.