Multitype Recurrent Events

In many studies of chronic disease subjects are at risk of different types of recurrent events. For example, transient ischemic attacks may be classified according to location in cardiovascular trials, migraines may be differentiated by severity in neurological studies, and in respiratory studies asthma exacerbations may be subtyped according to cellular analyses of sputum samples. In other settings, one may record the causes of production stoppages in manufacturing, different types of financial transactions in commerce, and the types of claims filed by insurance policy holders.