Table 1.
Population characteristics.
| Variable | aCL Category* | Total n = 87 | |||
|---|---|---|---|---|---|
| Normal n = 20 | Low n = 22 | Intermediate n = 20 | High n = 25 | ||
| Mean age, yrs (SD) | 48.9 (13.9) | 48.9 (13.9) | 46.7 (12.7) | 45.1 (15.5) | 47.6 (14.2) |
| % Female | 80 | 91 | 95 | 76 | 85 |
| Ethnic origin, n (%) | |||||
| Caucasian | 17 (85) | 19 (86) | 18 (90) | 20 (80) | 74 (85) |
| Black | 2 (10) | 0 | 0 | 2 (8) | 4 (5) |
| Hispanic | 0 | 0 | 1 (5) | 0 | 1 (1) |
| Asian | 1 (5) | 2 (9) | 0 | 2 (8) | 5 (6) |
| Other | 0 | 1 (5) | 1 (5) | 0 | 2 (2) |
| Smoking (ever), n (%) | 4 (20) | 5 (23) | 5 (25) | 3 (12) | 17 (20) |
| Comorbidities, n (%) | |||||
| Hypertension | 4 (20) | 6 (27) | 1 (5) | 5 (20) | 16 (18) |
| Diabetes mellitus | 0 | 3 (14) | 0 | 0 | 3 (4) |
| Thyroid disease | 5 (25) | 6 (27) | 2 (10) | 2 (8) | 15 (17) |
| RA | 3 (15) | 2 (9) | 3 (15) | 2 (8) | 10 (12) |
| SLE | 4 (20) | 6 (27) | 6 (30) | 10 (40) | 26 (30) |
| Chronic infection | 1 (5) | 0 | 1 (5) | 0 | 2 (2) |
| Thrombosis, n (%) | |||||
| Arterial | 1 (5) | 3 (14) | 3 (15) | 6 (24) | 13 (15) |
| Venous | 3 (15) | 3 (14) | 2 (10) | 2 (8) | 10 (12) |
| Arterial or venous | 4 (20) | 5 (23) | 4 (20) | 7 (28) | 20 (23) |
*
aCL categories were defined using aCL-IgG test results at entry: normal < 23 GPL; low 23.0–29.9 GPL; intermediate 30–49.9 GPL; High ≥ 50 GPL. SD: standard deviation; RA: rheumatoid arthritis; SLE: systemic lupus erythematosus.