Preference of epidemiological studies for establishing causality:-
Preference of epidemiological studies for establishing causality:- Double blind RCT > Retrospective coho > Prospective coho > Case control > cross sectional > Ecological study.
RCT > Retrospective coho > Prospective coho > Case control > Cross sectional
RCT > Prospective coho > Retrospective coho > Case control > Cross sectional
RCT > Prospective coho >Retrospective coho > Cross sectional > Case control
RCT > Retrospective coho > Prospective coho > Cross sectional > Case control
Epidemiology