|
Study characteristics
|
Studies contributing age groups
|
45
|
|
Studies comprising several distinct substudiesa
|
3
|
|
Countries represented
|
17
|
|
Setting
|
General population
|
21
|
|
Primary care practice
|
12
|
|
Hospital/nursing home
|
3
|
|
Health insurance
|
8
|
|
Several settings (and different data sets)b
|
1
|
|
Disease classification
|
Name of diseases/disease groups only
|
30
|
|
Diseases based on international classification systems
|
15
|
|
No. of diseases in the classification
|
Range of diseases under study
|
5 to over 300
|
|
Median
|
16
|
|
Data collection period
|
Up to one year
|
25
|
|
One year or more
|
19
|
|
Several periodsc
|
1
|
|
No. of study participants
|
Range of persons under study
|
301 to 5.6 million
|
|
Median
|
6864
|
|
No. of age groups
|
1
|
26
|
|
2 to 3
|
9
|
|
4 to 6
|
10
|
