IGHE and asthma: When compared to Easy-to-Control, Difficult-to-Control participants reported use of more asthma controller medications (p<0.001), had higher rates of oral corticosteroid courses for asthma (p<0.0001), higher total serum IgE (p = 0.004), and lower FEV1 (p<0.001) and FEV1/FVC (p<0.001) at study entry.