Table 2 Ultrasonographic identification of tophi and the double contour (DC) sign
Ultrasonic features | Prevalence | Missing values (n) |
|---|---|---|
Detection of at least one US tophus | 34 (53.1%) | |
Localisation of the largest US tophus | ||
Right MTP | 17 (50%) | |
Left MTP | 9 (26.5%) | |
Right ankle | 0 (0%) | |
Left ankle | 1 (2.9%) | |
Right knee | 1 (2.9%) | |
Left knee | 6 (17.6%) | |
US tophus volume (cm3) | 2.5 ± 6.5 | |
At least one joint with positive DC sign | 61 (95.3%) | |
Localisation of DC signs | ||
Right MTP | 48 (81.3%) | 2 |
Left MTP | 51 (86.4%) | 2 |
Right TC | 16 (26.7%) | 1 |
Left TC | 18 (30%) | 1 |
Right FP | 16 (25%) | |
Left FP | 14 (21.9%) | |