IMPROVEDD VTE Risk Score (Medical Inpatients)
IMPROVEDD VTE risk score (Gibson 2017): the seven IMPROVE items plus D-dimer ≥ 2× ULN give a 0–14 inpatient medical-VTE score; ≥ 2 is the threshold for discussing extended thromboprophylaxis.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Previous VTE
- Yes
- Active cancer
- Yes
- D-dimer ≥ 2× upper limit of normal
- Yes
Result: IMPROVEDD 7 — high VTE risk (≥ 4); at or above the ≥ 2 threshold for discussing extended thromboprophylaxis.
The tool opens with these values already filled in. Replace them with your own.
What the result means
- Risk
- Low 0–1, moderate 2–3, high ≥ 4; a total ≥ 2 is the threshold above which extended thromboprophylaxis is discussed. The D-dimer-augmented inpatient stratifier; not a prophylaxis order.
What you enter
- Previous VTE (+3)
- Known thrombophilia (+2)
- Current lower-limb paralysis (+2)
- Active cancer (+2)
- Immobilization ≥ 7 days (+1)
- ICU / CCU stay (+1)
- Age > 60 (+1)
- D-dimer ≥ 2× upper limit of normal (+2)
How this is calculated
- Points
- Previous VTE +3, thrombophilia +2, lower-limb paralysis +2, active cancer +2, immobilization ≥ 7 days +1, ICU/CCU +1, age > 60 +1, D-dimer ≥ 2× ULN +2. Total 0–14.
Gibson CM, Spyropoulos AC, Cohen AT, et al. The IMPROVEDD VTE risk score: incorporation of D-dimer into the IMPROVE score to improve venous thromboembolism risk stratification. TH Open. 2017;1(1):e56-e65. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.