Question

I really need help understanding/interperting this graph. the question is : how much of mortatality rate for CVD can be reduced if people are most fit in CRF compared fo one with least fit? (answer for both men and women)

Men 1.01 P for trend <0.001 in men and <0.001 in women Women 0.8 0.6 0.4 0.2 0.0 Least fit Cardiorespiratory fitness- Men 1.01 a Women P for trend <0.001 in men and <0.005 in women 0.8 0.6 0.4 0.2 0.0 3 Least fit Cardiorespiratory fitnessMost fit Figure 1. Relative risks of (A) all-cause and (B) cardiovascular disease (CVD) mortality by cardiorespiratory fitness quintiles for 40,451 (2657 all-cause and 943 CVD deaths) men and 12,831 (375 all cause and 90 CVD deaths) women aged 20-100 years without CVD or cancer in the Aerobics Center gitudinal Study. Cardiorespiratory fitness is measured by total duration during a maximal treadmill exercise test Relative risks 95% confidence intervals) are shown inside the bars and adjusted for age, year of examination, body mass index, smoking status, abnormal electrocardiogram, hypertension, diabetes, hypercholesterolemia, and family history of CVD

Answer 1

Mortality rate for CVD in Men can be reduced if men are most fit compared for one with least fit=0.75-0.53=0.22

Mortality rate for CVD in Women can be reduced if women are most fit compared for one with least fit=0.53-0.3=0.23