Comparison of Symptoms Days and Asthma Health Care Utilization

Baseline YearFollow-up YearChange
Mean days affected by asthma symptoms per yeara
Mean urgent asthma office visits per year
Mean ED asthma visits per yeara
Mean hospitalizations for asthma per year
  • a P < .05, after controlling for baseline values, patient age, patient gender, insurance type, asthma severity, and household smoking. The model also includes an interaction term for (group assignment) × (baseline value), with baseline values centered to its mean.