Age (years) 
 69 [55-80] 
 70 [57-80] 
 37 [25-78] 
 0.011 
 Male sex 
 18 (81.8) 
 13 (81.3) 
 5 (83.3) 
 1.0 
 Body mass index 
 22.9 [20.7-25.1] 
 21.4 [19.7-25.9] 
 23.3 [22.5-25.8] 
 0.395 
 Comorbidities 
 Hypertension 
 11 (50) 
 10 (62.5) 
 1 (16.7) 
 0.149 
 Diabetes mellitus 
 3 (13.6) 
 2 (12.5) 
 1 (16.7) 
 1.0 
 Hyperlipidemia 
 3 (13.6) 
 3 (18.8) 
 0 (0) 
 0.533 
 Chronic kidney disease 
 1 (4.5) 
 1 (6.3) 
 0 (0) 
 1.0 
 Heart failure 
 3 (13.6) 
 3 (18.8) 
 0 (0) 
 0.533 
 History of PCI 
 2 (9.1) 
 2 (12.5) 
 0 (0) 
 1.0 
 History of CABG 
 1 (4.5) 
 1 (6.3) 
 0 (0) 
 1.0 
 TIA, Stroke 
 2 (9.1) 
 2 (12.5) 
 0 (0) 
 1.0 
 Malignancy 
 3 (13.6) 
 3 (18.8) 
 0 (0) 
 0.533 
 Use of antiplatelet medication 
 3 (13.6) 
 3 (18.8) 
 0 (0) 
 0.533 
 Use of anticoagulant medication 
 3 (13.6) 
 3 (18.8) 
 0 (0) 
 0.533 
 Vital signs 
 GCS score 
 15 [15-15] 
 15 [15-15] 
 15 [15-15] 
 0.408 
 Systolic blood pressure (mmHg) 
 142 [130-167] 
 137 [128-166] 
 153 [131-178] 
 0.199 
 Heart rate (/min) 
 88 [72-98] 
 90 [76-113] 
 82 [65-89] 
 0.207 
 Respiratory rate (/min) 
 22 [18-25] 
 22 [18-27] 
 21 [18-23] 
 0.426 
 SpO 2 (%) 
 98 [96-99] 
 98 [97-99] 
 98 [97-100] 
 0.171 
 Symptoms 
 Stridor 
 10 (45.5) 
 10 (62.5) 
 0 (0) 
 0.015 
 Purpura on the neck 
 0 (0) 
 0 (0) 
 0 (0) 
 Deviation of the trachea 
 5 (22.7) 
 5 (31.3) 
 0 (0) 
 0.266 
 Cervical swelling 
 9 (40.9) 
 9 (56.3) 
 0 (0) 
 0.046 
 Laboratory **data** 
 White blood cell count (10 3 /μL) 
 9.7 [6.9-16.1] 
 10.3 [6.5-16.2] 
 9.4 [7.9-15.7] 
 0.966 
 Hemoglobin (g/dL) 
 13.2 [11.5-14.3] 
 13.0 [9.6-13.7] 
 15.3 [14.0-16.1] 
 0.004 
 Platelet count (10 3 /μL) 
 20.3 [14-25.7] 
 17.9 [11.9-25.0] 
 24.0 [20.9-30.2] 
 0.043 
 PT-INR 
 1.02 [0.96-1.1] 
 1.03 [1.0-1.23] 
 0.96 [0.93-1.01] 
 0.246 
 APTT (s) 
 28.5 [26.5-32.8] 
 30 [26.9-35.8] 
 27 [25.7-29.5] 
 0.233 
 Fibrinogen (mg/dL) 
 274 [219-347] 
 283 [233-365] 
 231 [188-274] 
 0.304