Types The 2005 Oxford Textbook of Medicine distinguishes type 1<unk>  by "persistent daily chaotic variability in peak flow (usually greater than 40 per cent diurnal variation in PEFR more than 50 per cent of the time)", while type 2 is identified by "sporadic sudden falls in PEFR against a background of usually well-controlled asthma with normal or near normal lung function". In both types, patients are subject to recurrent, severe attacks. The cardinal symptoms of an asthma attack are shortness of breath (dyspnea), wheezing, and chest tightness. Individuals with type 1 suffer chronic attacks in spite of ongoing medical therapy, while those with type 2 experience sudden, acute and even potentially life-threatening attacks even though otherwise their asthma seems well managed. When first defined by Margaret Turner-Warwick in 1977, the term<unk>  was used specifically to describe type 1, but as studies into the phenotype were conducted the second type was also distinguished.
Brittle asthma
Thunderstorm asthma
Yokkaichi asthma
Reactive airway disease
Cardiac asthma
Asthma
Mineral dust airway disease
Occupational asthma