Tudományos kutatás eredményeinél melyiket kell néznem, a kohorsz csoportot, vagy a kontroll csoportot?

Az alábbi leírás miatt szeretném tudni a választ: Overall Association: There have been over 73 observational studies that examine the

association between breast cancer and physical activity (51, 52). These studies (k) have been

either cohort (k=33), and case-control (k=40) epidemiologic studies. The proportion of

studies observing a statistically significant association in risk reduction in breast cancer was

similar between study designs, 39% and 40% of cohort and case-control studies,

respectively. However, the magnitude of the reduction in breast cancer risk was different

between study designs. Cohort studies estimated a 20% absolute risk reduction, whereas

case-control studies estimated a 30% absolute risk reduction.