Table 1.

TRiP(cast) score.^a

	Points
Traumab
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 edema/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
Immobilizationc
Upper-leg cast	3
Lower-leg cast	2
Foot cast (ankle free) or any semi-rigid without plantar support	1
Other cast or bracing with plantar support	0
Patient characteristicsd
Age <35 years	0
Age ≥35 and <55 years	1
Age ≥55 and <75 years	2
Age ≥75 years	3
Male sex	1
Body Mass Index BMI ≥25 and <35 kg/m2	1
Body Mass Index 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 Estrogenic hormone therapy	4
Cancer diagnosis within the past 5 years	3
Pregnancy or puerperium	3
Immobilization (other) within the past 3 monthse	2
Hospital admission, bedridden or flight > 6 h, Lower limb paralysis
Surgery within the past 3 months	2
Comorbidity	1
Heart failure, rheumatoid arthritis, chronic kidney disease, COPD, IBD
Chronic venous insufficiency (varicose veins)	1

^aThrombosis Risk Prediction in patients with cast immobilization score TRiP(cast) score is the sum of the Trauma, Immobilization and Patient components.

^bTrauma: Choose one, (the most severe trauma).

^cImmobilization: Choose one.

^dPatient: multiple points can be scored.

^eOther immobility next to cast immobilization.