<prompt> In a case-control study, the cases were found to be consuming zarda pan more frequently than controls and the difference was statistically significant. It indicates:Zarda pan is the cause of the diseaseThe incidence of the disease was more in those consuming zarda panThe disease can be cured if zarda pan is stoppedAn association exists between zarda pan and disease  <response>: Case-control study that looks backward in time from final disease outcome to potential cause. In it, groups of affected individuals cases and unaffected individuals controls are compared to the extent of their exposure to some suspected risk factor. Key points In a case-control study, if the outcome was statistically significant, there is an association between cases and controls.Soben Peter Essentials of preventive and community dentistry 4th edition 