Characteristics of included patients with SVT
| Item | Isolated SVT n/N (%) | SVT with VTE sequelae n/N (%) | OR (95% CI) | |
| Univariate | Multivariate | |||
| Age | ||||
| Mean age | 56.3 years | 56.2 years | NA | NA |
| Proportion >75 years | 371/1925 (19.3%) | 13/83 (15.7%) | 0.78 (0.43 to 1.42) | 0.76 (0.41 to 1.40) |
| Females | 1271/1925 (66.0%) | 52/83 (62.7%) | 0.86 (0.55 to 1.36) | 0.99 (0.62 to 1.57) |
| Active malignancy | 74/1925 (3.8%) | 7/83 (8.4%) | 2.30 (1.03 to 5.17) | 2.19 (0.97 to 4.95) |
| Pregnancy | 82/1925 (4.3%) | 1/83 (1.2%) | 0.27 (0.04 to 1.99) | 0.28 (0.04 to 2.05) |
| Varicose veins | 760/1925 (39.5%) | 22/83 (26.5%) | 0.55 (0.34 to 0.91) | 0.57 (0.34 to 0.94) |
NA, not applicable; SVT, superficial venous thrombosis; VTE, venous thromboembolism.