Characteristics | Number of studies (%) |
---|---|
Type of population | Â |
NSCLC | 23 (74) |
Mixed population a) | 7 (23) |
Not reported | 1 (3) |
Sample size | Â |
< 200 | 12 (39) |
200–500 | 10 (32) |
> 500 | 9 (29) |
Study design | Â |
Prognostic factor study | 27 (88) |
Prognostic model development | 4 (12) |
Data source | Â |
Observational study | 18 (58) |
Clinical trial | 8 (26) |
Routinely collected data | 5 (16) |