ABSTRACT
Duration analysis Duration data The previous section discussed count data models, where the dependent variable is the number of events occurring over a period of time, for example the number of GP visits over the previous month. A closely related topic is duration analysis. Here, the focus is on the time elapsed before an event occurs, rather than on the number of events. So, for example, duration could measure the number of years that someone lives from birth; or it could measure a patient’s length of stay after admission to hospital; or it could measure the number of years that someone smoked cigarettes.
