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发表于 2011-7-6 22:43:10
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回复 10# 绿茵场
这个问题越讨论越明确了，我理解的rate应该有人时的。
Two types of measures of incidence defined by the type of denominator
– Incidence measures based on persons at risk
Incidence proportion=number of disease onsets/initial size of the population
– Incidence measures based on person-time units at risk
Incidence rate (incidence density, person-time rate)＝Number of disease onsets/Σtime spent in population
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楼主: dearhang
