Incidence rate ratios for DM among patients diagnosed with GCA or GPA compared with age- and sex-matched population controlsa. Values are incidence rate ratiob (95% CI).
| Variables | < 1 Yr from Study Inclusionc | 1–5 Yrs from Study Inclusion | > 5 Yrs from Study Inclusion |
|---|---|---|---|
| Patients with GCA, n = 1682 | 7.0 (5.2–9.3) | 0.9 (0.6–1.3) | 0.7 (0.5–1.0) |
| Men | 6.6 (4.2–10) | 0.8 (0.4–1.4) | 0.5 (0.3–1.1) |
| Women | 7.3 (5.0–10) | 1.0 (0.7–1.5) | 0.8 (0.5–1.2) |
| Aged 50–70 yrs | 3.6 (1.7–7.5) | 1.1 (0.6–2.1) | 0.7 (0.4–1.2) |
| Age > 70 yrs | 8.0 (5.9–11) | 0.8 (0.5–1.3) | 0.7 (0.4–1.2) |
| Patients with GPA, n = 342 | 10.4 (4.4–24) | 1.6 (0.8–3.5) | 1.3 (0.6–2.5) |
| Men | 11.9 (3.2–44) | 1.3 (0.5–3.9) | 0.7 (0.2–2.1) |
| Women | 9.4 (3.0–29) | 2.1 (0.7–6.0) | 2.1 (0.9–5.0) |
| Age < 50 yrs | 6.1 (1.01–36) | 3.2 (0.9–12) | 2.1 (0.7–6.3) |
| Age 50–70 yrs | 10.9 (3.7–32) | 1.2 (0.4–3.6) | 1.0 (0.4–2.6) |
| Age > 70 yrs | 22.1 (2.0–245) | 1.3 (0.2–9.9) | —e |
↵a Each patient was matched with 9 population controls.
↵b Adjusted for age and sex.
↵c As defined in text.
↵d Age at date of study inclusion. In the GCA cohort, no patients were < 50 years of age at date of study inclusion.
↵e No cases of DM among the patients with GPA. DM: diabetes mellitus; GCA: giant cell arteritis; GPA: granulomatosis with polyangiitis.