CD4 and deep vein thrombosis: The final model for predicting the incidence of DVT following thoracoscopic LC resection (1 day after surgery) was Logit(P) = 9.378 − 0.061(R value) − 0.109(K value) + 0.374(α angle) + 0.403(MA) + 0.298(FIB) + 0.406(D-D) + 0.190(MDA) – 0.097(CD4+/CD8+).