Table 1 Main epidemiologic data for 118 patients with RA who underwent ultrasonographya
Variable | Mean ± SD or number of patients (%) | Median (IQR) |
|---|---|---|
Age at the time of the study, years | 58.4 ± 12.9 | 59.5 (49 to 68.5) |
Disease duration from RA diagnosis, years | 13.8 ± 7.7 | 14 (7 to 19.7) |
Women | 89 (75.4%) | |
Rheumatoid factor-positive | 96 (81.4%) |