Table 1

TRiP(cast) score*

Trauma†	Points
High-risk trauma	3
Fibula and/or tibia shaft fracture
Tibial plateau fracture
Achilles tendon rupture
Intermediate-risk trauma	2
Bi or tri-malleolar ankle fracture
Patellar fracture
Ankle dislocation, Lisfranc injury
Severe knee sprain (with oedema/haemarthrosis)
Severe ankle sprain (grade 3)
Low-risk trauma	1
Single malleolar ankle fracture
Patellar dislocation
(Meta)tarsal bone(s) or forefoot fracture
Non-severe knee sprain or ankle sprain (grade 1 or 2)
Significant muscle injury
Immobilisation‡
Upper-leg cast	3
Lower-leg cast	2
Foot cast (ankle free) or any semi-rigid cast without plantar support	1
Other cast or bracing with plantar support	0
Patient characteristics§
Age <35 years	0
Age ≥35 years and <55 years	1
Age ≥55 years and <75 years	2
Age ≥75 years	3
Male sex	1
BMI ≥25 kg/m² and <35 kg/m²	1
BMI ≥35 kg/m²	2
Family history of VTE (first-degree relative)	2
Personal history of VTE or known major thrombophilia	4
Current use of oral contraceptives or oestrogenic hormone therapy	4
Cancer diagnosis within the past 5 years	3
Pregnancy or puerperium	3
Immobilisation (other) within the past 3 months¶	2
Hospital admission, bedridden or flight >6 hours and lower limb paralysis	2
Surgery within the past 3 months	2
Comorbidity	1
Heart failure, rheumatoid arthritis, chronic kidney disease, chronic obstructive pulmonary disease and inflammatory bowel disease	1
Chronic venous insufficiency (varicose veins)	1

*TRiP(cast) score is the sum of the Trauma, Immobilisation and Patient component scores.
†Trauma: choose one (the most severe trauma).
‡Immobilisation: choose one.
§Patient: multiple points can be scored.
¶Other immobility next to cast immobilisation.
BMI, body mass index; TRiP(cast), Thrombosis Risk Prediction for patients with cast immobilisation score; VTE, venous thromboembolism.