Clinical and Prognostic Significance of Lupus Anticoagulant Measurement in Patients With Lung Cancer

Lupus anticoagulants is related to both recurrent thrombosis and cancer. Thrombotic complications occur more frequently in patients with lung cancer. The aim of this study is to investigate the association of lupus anticoagulants with hypercoagulability and thrombotic complications, as well as prognostic significance of lupus anticoagulants for patients with lung cancer. The study comprised 205 patients with non-small cell lung cancer. Plasma normalized LAC ratio, D-dimer, fibrinogen, activities of antithrombin, and FVIII before treatment were analyzed by coagulation analyzer, and routine hematologic and biochemical parameters were also evaluated. In patients, normalized LAC ratio, D-dimer, fibrinogen, and procoagulant activity of coagulating factor VIII levels significantly increased, whereas antithrombin activity significantly decreased compared with healthy controls ( P < .001). Normalized LAC ratio was positively correlated with D-dimer, fibrinogen, and procoagulant activity of coagulating factor VIII, and negatively correlated with antithrombin activity, respectively ( P < .01). D-dimer, procoagulant activity of coagulating factor VIII, and antithrombin levels revealed statistical difference in non-deep venous thrombosis patients with elevated or normal normalized LA ratio ( P < .05). The incidence of deep venous thrombosis and tumor metastasis was higher, and 1-year survival rate was lower in elevated normalized LAC ratio patients than in normal ones, respectively ( P < .01). There was higher normalized LAC ratio level in patients with deep venous thrombosis and/or metastasis ( P < .05). In 1-year deceased patients, normalized LAC ratio level and the incidence of deep venous thrombosis and metastasis were higher than those in survivors, respectively ( P < .05). Hazard regression analysis demonstrated normalized LAC ratio was independently associated with short survival time in patients with non-small cell lung cancer (hazard regression: 2.871, 95%confidence interval: 1.704-4.835; χ2: 19.130; P < .01). Our study suggests that lupus anticoagulants is a useful marker to predict thrombotic complications and prognosis in patient with lung cancer.