Table 4. Population attributable risk of sudden cardiac death by low-risk lifestyle^a in women.

Population	% person-time in population	% of person-years at low-risk	Total cases	Cases at low-risk	IR in women at low-riskb	RR (95%CI)c	%PAR (95% CI)c
All women	100%	8%	321	4	3	0.18 (0.07, 0.49)	81% (52%, 93%)
Non-smoking women	86%	9%	252	4	3	0.21 (0.08, 0.56)	78% (46%, 92%)
Women without clinically diagnosed CHD	91%	8%	213	3	2	0.19 (0.06, 0.60)	79% (40%, 93%)
Women with clinically diagnosed CHD	9%	5%	108	1	11	0.17 (0.02, 1.23)	80% (0.4%, 97%)

^aLow-risk lifestyle is defined as not currently smoking, aMed diet score in top 40% of distribution, exercise at moderate-to-vigorous intensity for ≥30 min/day and BMI<25 kg/m². In nonsmokers, low-risk lifestyle is defined as aMed diet score in top 40% of distribution, exercise at moderate-to-vigorous intensity for ≥30 min/day and BMI<25 kg/m²

^bIncidence rate(IR) is per 100,000 person-years of follow-up

^cRelative risks are estimated from Cox proportional hazards models adjusted for age (months), family history of MI (no, <60 years, 60+ years), menopausal status (yes / no), current hormone therapy (yes/no), and presence of diabetes, hypertension, high cholesterol, cancer, coronary heart disease and stroke at baseline (all yes/no). Age, menopausal status and current hormone therapy were treated as time-varying covariates