19bec0cb_ocess___Cancer_Guidelines_Wiki__Prognosis
[Level] III-3 [Intervention] A comparative study without concurrent controls: Historical control study Two or more single arm study Interrupted time series without a parallel control group [Diagnosis] Diagnostic case-control study [Aetiology] A case-control study [Screening] A comparative study without concurrent controls: Historical control study Two or more single arm study [Prognosis] 
A retrospective cohort study
Guideline development process - Cancer Guidelines Wiki
Prognosis