Determinants of racial and ethnic disparities in utilization of hospital-based care for asthma among Medi-Cal children in Los Angeles.

: We sought to identify racial/ethnic patterns of health care utilization for asthma among asthmatic children (ages 0-18) and address unequal access to optimal asthma management as a determinant of asthma disparities.: We used children Medi-Cal (California’s Medicaid program) enrollees, including African American, Asian, Hispanic, and White children in Los Angeles and retrieved individual hospital utilization records of 69,118 asthmatic children (2013-2018). We applied Hierarchical Generalized Linear Models (HGMLs) to identify the patterns of health care utilization at the individual level, controlling for demographic and neighborhood characteristics.: African American children show a higher ratio of ED to outpatient visits (OR =1.32, 95% CI 1.08-1.62) and hospitalizations to outpatient visits (OR =1.50, 95% CI 1.30-1.73). They also had a high ratio of ED visits (OR =1.36, 95% CI 1.10-1.68) and hospitalizations (OR =1.47, 95% CI 1.26-1.71) relative to PCP visits. A ratio of ED visits and hospitalizations decreased if a ratio of controller medications to total medications was greater than 0.5, but increased if children were male, under 11 years old, or living in low-income neighborhoods (Median household income 20%).: African American male children from disadvantaged neighborhoods are at the highest risk for higher utilization of hospital-based care for asthma. Our findings also indicate a lower ratio of controller medications contributed to increases in ED visits and hospitalizations, suggesting suboptimal management of asthma and a lack of intervention treatment through medications among minority children.