IMPROVE score

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Rim Halaby, M.D. [2]

Overview

The IMPROVE score for venous thromboembolism (VTE) assesses the risk of VTE among hospitalized medical patients. The MPROVE predictive score for VTE includes 4 independent risk factors for VTE which are present at admission. The IMPROVE associative score for VTE includes 7 variables present either at admission or during hospitalization; however the timing of the presence of some of the factors compared to the onset of VTE was not available.[1]

IMPROVE Predictive Score for VTE

Calculation of the IMPROVE Predictive Score

Variable Score[1]
Prior episode of VTE 3
Thrombophilia 3
Malignancy 1
Age more than 60 years 1

Interpretation of the IMPROVE Predictive Score

Score Predicted VTE risk through 3 months[1]
0 0.5%
1 1.0%
2 1.7%
3 3.1%
4 5.4%
5-8 11%

IMPROVE Associative Score for VTE

IMPROVE associative risk score assesses the risk of VTE among hospitalized medical patients. While the IMPROVE predictive score includes 4 independent risk factors for VTE which are present at admission, IMPROVE associative score includes 7 variables present either at admission or during hospitalization; however the timing of the presence of some of the factors compared to the onset of VTE is not available.[1]

Calculation of the IMPROVE Associative Score

Variable Score[1]
Prior episode of VTE 3
Thrombophilia 2
Paralysis of the lower extremity during the hospitalization 2
Current malignancy 2
Immobilization for at least 7 days 1
ICU or CCU admission 1
Age more than 60 years 1

Interpretation of the IMPROVE Associative Score

Score Predicted VTE risk through 3 months[1]
0 0.4%
1 0.6%
2 1.0%
3 1.7%
4 2.9%
5-10 7.2%

References

  1. 1.0 1.1 1.2 1.3 1.4 1.5 Spyropoulos AC, Anderson FA, Fitzgerald G, Decousus H, Pini M, Chong BH; et al. (2011). "Predictive and associative models to identify hospitalized medical patients at risk for VTE". Chest. 140 (3): 706–14. doi:10.1378/chest.10-1944. PMID 21436241.