Consistently very poorly controlled asthma, as defined by the impairment domain of the Expert Panel Report 3 guidelines, increases risk for future severe asthma exacerbations in The Epidemiology and Natural History of Asthma: Outcomes and Treatment Regimens (TENOR) study.
Haselkorn T, Fish JE, Zeiger RS, Szefler SJ, Miller DP, Chipps BE, Simons FE, Weiss ST, Wenzel SE, Borish L, Bleecker ER. Consistently very poorly controlled asthma, as defined by the impairment domain of the Expert Panel Report 3 guidelines, increases risk for future severe asthma exacerbations in The Epidemiology and Natural History of Asthma: Outcomes and Treatment Regimens (TENOR) study. J Allergy Clin Immunol. 2009 Nov; 124(5):895-902.e1-4.