front
|
1
|
2
|
3
|
4
|
5
|
6
|
7
|
8
|
9
|
10
|
11
|
12
|
13
|
14
|
15
|
16
|
17
|
18
|
19
|
20
|
21
|
22
|
23
|
24
|
25
|
26
|
27
|
28
|
29
|
30
|
31
|
32
|
33
|
34
|
35
|
36
|
37
|
38
|
39
|
40
|
41
|
42
|
43
|
44
|
review
FOR SHORT PERIOD STUDIES:
Incidence rate (number of new cases / population at risk)
Instantaneous incidence rate (new cases per unit time relative to disease-free population at risk at time t.)
FOR LONGER STUDIES:
Cumulative incidence (disease risk during a specific interval/length of that interval)
Cumulative incidence rate (summing the products of incidence rate and interval length over a series of intervals)
