Cause to effect progression is seen in all except?: (A) Case control study, (B) Ecological study, (C) Coho study, (D) Randomized control trial
Answer is A. Ans. is 'a' i.e., Case control study o Case-control study proceeds backward from effect to cause, i.e. disease has already occured in subjects. o All other studies proceeds forward from cause to effect, i.e. disease has not occured in subjects.