![]() ![]() ![]() Her rate of strokes is one per year of follow-up (or, equivalently 0.083 per month of follow-up). For example, a woman may experience two strokes during a follow-up period of two years. This is particularly appropriate when the events being counted are rare. Rate data occur if counts are measured for each participant along with the time over which they are observed. These events may not happen at all, but if they do happen there is no theoretical maximum number of occurrences for an individual.Īs described in Chapter 7 (Section 7.7.5), count data may be analysed using methods for dichotomous (see Section 9.4.4), continuous (see Section 9.4.5) and time-to-event data (see Section 9.4.9) as well as being analysed as rate data. For example, ‘number of strokes’, or ‘number of hospital visits’ are counts. Results may be expressed as count data when each participant may experience an event, and may experience it more than once (see Section 9.2.5). For the current version, please go to /handbook/current. ![]()
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