Fig. 2
Estimated life expectancy at age 55 according to the number of low-risk lifestyle factors excluding individual low-risk lifestyle factors (excluding a smoking status, b alcohol use, c physical activity, d sleep, e body mass index). Low-risk lifestyle factors included never smoking status, never alcohol use, regular physical activity (≥ 2 h/week), sufficient sleep duration (≥ 6 h/day) and normal BMI (≥ 18.5 kg/m2)