The authors of a study report a RR of XXXXXXXXXX% CI 1.6–2.0) for the association between alcohol intake and cancer. The authors of a second study report an OR of XXXXXXXXXX% CI 0.7–3.5) for the...

The authors of a study report a RR of 1.8 (95% CI 1.6–2.0) for the association between alcohol intake and cancer. The authors of a second study report an OR of 1.8 (95% CI 0.7–3.5) for the association between caffeine intake and the same cancer. What do the results of these studies tell us (i) about the studies and (ii) about risk factors for the cancer?