Number of ACS, followup, and HR for ACS stratified by time since diagnosis for patients with IIM and general population comparators.
| Time since Diagnosis, yrs | Patients with IIM | General Population | HR (95% CI)† | ||
|---|---|---|---|---|---|
| ACS, n | Followup, PY | ACS, n | Followup, PY | ||
| < 1 | 13 | 620 | 42 | 6759 | 3.6 (1.9–6.7) |
| 1–5 | 28 | 2385 | 158 | 28,408 | 2.4 (1.6–3.7) |
| 5–12 | 12 | 2481 | 113 | 32,445 | 1.8 (1.0–3.3) |
↵† HR estimated by Cox models adjusted for age, sex, and county of residence at index year. IIM: idiopathic inflammatory myopathy; ACS: acute coronary syndrome; PY: person-years.