To evaluate if a multilevel home and preschool asthma educational program is more effective in improving asthma control, compared with a preschool-based program alone. Specifically, because this study was conducted within the Head Start program and targeted at an at risk population, with the study, the researchers examined if their multilevel intervention could address asthma disparities.

Eligible participants were caregivers with children aged 2 to 6 years with the confirmed physician-diagnosed of asthma who were also enrolled in one of 14 Head Start programs in Baltimore, Maryland. Participants were recruited from April 1, 2011, to November 31, 2016.

Screening forms were provided through Head Start staff, and families who gave permission were contacted by telephone to confirm eligibility and schedule the first home visit. Families were randomly assigned to either the Action for a Better Community (ABC) Plus Head Start education group or the Head Start education alone group by...

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