Risk factors for death in asthma included:
- higher severity-of-asthma scores
- lower perceived asthma control scores
The highest risk patients seem to have severe asthma but they "do not feel it" until it is too late.
Severe asthma - differential diagnosis and management (click to enlarge the image).
Risk factors for death in adults with severe asthma. Omachi TA, Iribarren C, Sarkar U, Tolstykh I, Yelin EH, Katz PP, Blanc PD, Eisner MD. Ann Allergy Asthma Immunol. 2008 Aug;101(2):130-6.
An approach to recalcitrant, severe asthma - AAAAI Ask the Expert, 2011.