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  • Title: Combined Oral Contraceptive Use Increases the Risk of Venous Thromboembolism After Knee Arthroscopy and Anterior Cruciate Ligament Reconstruction: An Analysis of 64,165 Patients in the Truven Database.
    Author: Traven SA, Farley KX, Gottschalk MB, Goodloe JB, Woolf SK, Xerogeanes JW, Slone HS.
    Journal: Arthroscopy; 2021 Mar; 37(3):924-931. PubMed ID: 33478778.
    Abstract:
    PURPOSE: To use the Truven MarketScan database to (1) report the incidence of venous thromboembolism (VTE), including deep vein thromboses (DVTs) and pulmonary embolism (PE), in patients undergoing simple knee arthroscopy and anterior cruciate ligament (ACL) reconstruction, and (2) evaluate combined oral contraceptive (COCP) use as a potential risk factor for VTE in patients undergoing knee arthroscopy. METHODS: All female patients between the ages of 16 and 40 years undergoing knee arthroscopy and ACL reconstruction between 2010 and 2015 were identified in the MarketScan database. Patients were stratified by whether they had a documented pharmaceutical claim for COCP therapy, and the primary outcome was the risk of DVT and or PE within 90 postoperative days. RESULTS: In total, 64,165 patients were identified for inclusion. While the overall incidence of VTE was low, patients taking COCPs had an increased risk of a DVT or PE compared with those not on COCPs (odds ratio [OR] 2.1, P < .001). When patients were analyzed by procedural subgroup (ACL reconstruction and simple knee arthroscopy), similar results held true. Furthermore, smoking and obesity had a synergistic effect when combined with COCPs use on the risk of VTE. Specifically, 3.1% of patients with obesity on COCPs (OR 3.1, P < .001) and 4.0% of smokers on COCPs (OR 4.3, P < .001) developed a postoperative VTE. CONCLUSIONS: This study demonstrates that COCP use is associated with an increased risk for a symptomatic DVT or PE (1.70% and 0.27%, respectively) after knee arthroscopy and an increased risk for DVT, but not PE (1.80% and 0.23%, respectively), after ACL reconstruction. In addition, patients with multiple risk factors present such as tobacco use, obesity, and COCP use had odds ratios greater than the sum of the individual risk factors alone. LEVEL OF EVIDENCE: level III prognostic cohort study.
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