Copyright © 2006 by American Society of Health-System Pharmacists Thromboprophylaxis in medically ill patients at risk for venous thromboembolismEDWARD BURLEIGH, M.B.A., is Senior Analyst; CHENG WANG, M.D., PH.D., is Analyst; DAVID FOSTER, PH.D., M.P.H., is Chief Scientist; SIVANA HELLER, M.D., M.P.H., is Senior Clinical Scientist; DENNIS DUNN, PH.D., is Senior Scientist; KAVEH SAFAVI, M.D., J.D., is Chief Medical Officer; BRIAN GRIFFIN, M.B.A., is Director of Analytical Services; and JEFF SMITH, M.H.A., is Account Manager, Solucient Inc., Evanston, IL. Address correspondence to Dr. Foster at 100 Connell Drive, Suite 1000, Berkeley Heights, NJ 07922 (Dfoster{at}solucient.com).
Summary. Using Solucients ACTracker Inpatient Database, medical discharges between January 2001 and December 2004 were extracted and patients who had indications for thromboprophylaxis (acute myocardial infarction, ischemic stroke, cancer, heart failure, or severe lung disease) were identified. Patients < 40 years or with deep-vein thrombosis or pulmonary embolism, active peptic ulcer, malignant hypertension, blood disease, HIV infection, or intubation of gastrointestinal or respiratory tract were excluded. Rates of thromboprophylaxis and mortality were compared between groups. Mean total drug costs and hospital costs per patient discharge were compared between patient groups.
Of 12,887,080 medical discharges extracted from 330 hospitals, there were 2,367,362 patients with indications for thromboprophylaxis. Patients were subdivided on the basis of whether they received thromboprophylaxis (n = 717,850) or not (n = 1,649,512). The thromboprophylaxis rate was low, despite increasing from 26% to 33% over the study period. Patients receiving thromboprophylaxis had significantly lower risk-adjusted mortality rates than those who did not (p < 0.001), except those with ischemic stroke. The mean total drug cost per patient receiving LMWH and UFH ($791 and $569, respectively) was higher than for patients not receiving thromboprophylaxis ($372) (p < 0.001). The mean total hospital cost per patient receiving UFH ($7615) was higher than for LMWH ($6866, p < 0.001).
Conclusion. The thromboprophylaxis rate among medical patients was low, with no significant improvement between 2001 and 2004. Thromboprophylaxis can impact patient mortality rates. Economic evaluation revealed that the use of LMWH for thromboprophylaxis in at-risk medical patients was associated with higher total drug costs but lower total hospital costs than UFH. Efforts should be made to increase clinicians awareness of clinical guidelines.
Index terms: American College of Chest Physicians; Anticoagulants; Costs; Economics; Heparin; Heparins; Hospitals; Mortality; Physicians; Prescribing; Protocols; Rational therapy; Thromboembolism
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