TABLE 4.

Atherosclerotic Cardiovascular Disease Rates and Incidence Rate Ratios Stratified by Estimated 10-Year and 30-Year Risk

	Young Adults, n (%)	Total Person-Years	ASCVD Events	Rate per 1,000 Person-Years (95% CI)	Crude IRR (95% CI)	Age-adjusted IRR (95% CI)	Age- and Sex-Adjusted IRR (95% CI)
Elevated 10-year risk	4,156 (1.0)	16,144	42	2.60 (1.92–3.52)	8.05 (5.89–10.98)	7.02 (5.14–9.59)	5.98 (4.36–8.22)
Low 10-year/elevated 30-year risk	6,425 (1.6)	27,235	51	1.87 (1.42–2.46)	5.79 (4.36–7.69)	3.74 (2.80–4.99)	3.04 (2.25–4.10)
Low 10-year/low 30-year risk	403,679 (97.4)	2,226,787	720	0.32 (0.30–0.35)	Reference	Reference	Reference

Definitions for elevated and low risk: 10-year risk: elevated ≥7.5%, low <7.5%; 30-year risk: elevated ≥20%, low <20%.

ASCVD = atherosclerotic cardiovascular disease.