Objectives
To determine whether the Child Opportunity Index (COI), a nationally-available measure of relative educational, health/environmental, and social/economic opportunity across census tracts within metropolitan areas, was associated with population- and patient-level asthma morbidity.
Study design
This population-based retrospective cohort study was conducted between 2011–2013 in 1 Southwest Ohio county. Participants included all children, 1–16 years, with hospitalizations or emergency department visits for asthma or wheezing at a major pediatric hospital. Patients were identified using discharge diagnosis codes and geocoded to their home census tract. The primary population-level outcome was census tract asthma hospitalization rate. The primary patient-level outcome was re-hospitalization within 12 months of index hospitalization. Census tract opportunity was characterized using the COI and its educational, health/environmental, and social/economic domains.
Results
Across 222 in-county census tracts, there were 2,539 geocoded hospitalizations. The median asthma-related hospitalization rate was 5.0 per 1,000 children per year (interquartile range: 1.9–8.9). Median hospitalization rates in very low, low, moderate, high, and very high opportunity tracts were 9.1, 7.6, 4.6, 2.1, and 1.8 per 1,000, respectively (P < .0001). The social/economic domain had the most variables significantly associated with the outcome at the population level.
The adjusted patient-level analyses showed that the COI was not significantly associated with a patient’s risk of re-hospitalization within 12 months.
Conclusions
The Child Opportunity Index was associated with population-level asthma morbidity. The detail provided by the COI may inform interventions aimed at increasing opportunity and reducing morbidity across regions.