Table 1.

Characteristics of sudden cardiac death cases and controls

Characteristics	Sudden cardiac death cases (N = 600)	Matched controls (N = 600)
Age at time of blood sample – years	64 (9)	64 (9)
Age at sudden death – years	72 (9)	N/A
Male sex	395 (66%)	395 (66%)
White race	581 (97%)	585 (98%)
ASCVD at time of blood sample	145 (24%)	145 (24%)
ASCVD at time of sudden death	232 (39%)	N/A
Smoking status
Never	225 (38%)	230 (38%)
Former	275 (46%)	283 (47%)
Current	94 (16%)	85 (14%)
Study cohort
Physicians Health Study I	156	156
Physicians Health Study II	112	112
Health Professionals Follow-up Study	127	127
Nurses’ Health Study	126	126
Women’s Antioxidant Cardiovascular Study	41	41
Women’s Health Study	38	38

Data are mean SD, or n (%).

ASCVD – atherosclerotic cardiovascular disease; N/A – Not applicable;