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Can Universal Access to Health Care Eliminate Health Inequities Between Children of Poor and Nonpoor Families?^*

A Case Study of Childhood Asthma in Alberta

^* From the Departments of Medicine, Pulmonary Division (Drs. Sin and Man), and Public Health Sciences (Mr. Svenson), University of Alberta, Edmonton, AB; and the Department of Medicine (Dr. Cowie), University of Calgary, Calgary, AB, Canada.

Correspondence to: Don D. Sin, MD, MPH, FCCP, 2E4.29 Walter C. Mackenzie Centre, University of Alberta, Edmonton, AB, Canada T6G 2B7; e-mail: don.sin{at}ualberta.ca

Study objectives: Children from poor families are much more likely to have emergency visits for asthma than those from nonpoor families, which may be related to financial access barriers to good preventive care for the poor. We sought to determine whether in a health-care system that provides free access to outpatient and hospital services, the disparities in the rates of emergency visits for asthma would be less apparent across the income gradient.

Design: Longitudinal, population-based study.

Setting: Alberta, Canada.

Participants: All children born in Alberta, Canada between 1985 and 1988 (n = 90,845) were classified into three mutually exclusive groups based on the reported annual income of their parents from the previous year: very poor, poor, and nonpoor groups.

Measurements and results: We compared the relative risk (RR) of emergency visits for childhood asthma among children of very poor, poor, and nonpoor families using a Cox proportional hazard model during a 10-year follow-up. We found that the very poor children were 23% more likely to have had an emergency visit for asthma than those from nonpoor families (RR, 1.23; 95% confidence interval [CI], 1.14 to 1.33), adjusted for a variety of factors. The poor group, however, had a similar risk of asthma emergency visits as the nonpoor group (RR, 0.97; 95% CI, 0.91 to 1.04). The average number of office visits for asthma was similar between the very poor and nonpoor groups.

Conclusions: In a setting of universal access to health care, children of poor and nonpoor families had similar rates of asthma emergency visits; the very poor children, however, continued to experience an excess risk. These findings suggest that a universal health-care system can reduce, but not fully eliminate, the disparities in emergency utilization of asthma across income categories.

Key Words: asthma • emergency • poor • rates

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