In a case-control study, all can be measured except
Relative risk=incidence among exposed/incidence among non exposed A typical case-control study does not provide incidence rates from which relative risk can be calculated directly because there is no appropriate denominator or population at risk to calculate these rates. In general, relative risk can be exactly determined only from a coho study. (pg no:73 park 23 rd edition )
Relative risk
Incidence
Odds ratio
Cause & effect relation
Epidemiology