| | Characteristics | All patients () | No DVT () | DVT () | value |
| | Demographic parameters | | | | | | Sex, no. (%) | | | | | | Male | 46 (75.4) | 24 (75.0) | 22 (75.9) | 1.000 | | Age—years, mean (sd) | 60.44 (11.43) | 58.88 (11.56) | 62.17 (11.23) | 0.264 | | BMI—kg/m2, mean (sd) | 32.04 (5.85) | 31.82 (6.48) | 32.29 (5.18) | 0.759 |
| | Severity of the disease | | | | | | SAPS II, mean (sd) | 37.33 (11.62) | 38.62 (12.69) | 35.90 (10.34) | 0.193 | | SOFA, mean (sd) | 6.7 (2.7) | 7.23 (2.78) | 6.31 (2.59) | 0.193 | | Death at 28 days, no. (%) | 15 (24.6) | 7 (21.9) | 8 (27.6) | 1.000 |
| | Days between ICU admission and CDU, mean (sd) | 9.14 (6.13) | 8.53 (6.14) | 10.34 (6.11) | 0.253 |
| | Medical history, no. (%) | | | | | | Arterial hypertension | 28 (45.9) | 12 (37.5) | 16 (55.2) | 0.260 | | Diabetes mellitus | 23 (37.7) | 12 (37.5) | 11 (37.9) | 1.000 | | Dyslipidaemia | 18 (29.5) | 9 (28.1) | 9 (31.0) | 1.000 | | Coronary artery disease | 11 (18.0) | 6 (18.8) | 5 (17.2) | 1.000 | | Cancer | 7 (11.5) | 3 (9.4) | 4 (13.8) | 0.890 | | Active smoking | 5 (8.2) | 5 (15.6) | 0 (0.0) | 0.064 | | COPD | 8 (13.1) | 5 (15.6) | 3 (10.3) | 0.818 | | Asthma | 7 (11.5) | 1 (3.1) | 6 (20.7) | 0.081 | | OSAS | 7 (11.5) | 2 (6.2) | 5 (17.2) | 0.346 |
| | Medication, no. (%) | | | | | | ACEI | 10 (16.4) | 3 (9.4) | 7 (24.1) | 0.227 | | ARB | 12 (19.7) | 7 (21.9) | 5 (17.2) | 0.895 | | Antiplatelet aggregation drugs | 14 (23.0) | 8 (25.0) | 6 (20.7) | 0.924 | | Long-term anticoagulant treatment | 5 (8.2) | 2 (6.2) | 3 (10.3) | 0.920 |
| | Haematological parameters at admission | | | | | | Leukocyte count—109/L, mean (sd) | 9.23 (4.83) | 9.65 (5.71) | 8.76 (3.63) | 0.485 | | Lymphocyte count—109/L, mean (sd) | 0.83 (0.38) | 0.80 (0.33) | 0.86 (0.42) | 0.737 | | Neutrophil count—109/L, mean (sd) | 7.31 (3,86) | 7.19 (4,53) | 7.45 (2.89) | 0.048 | | Platelet count—109/L, mean (sd) | 254 (111) | 258 (111) | 248 (112) | 0.507 | | D-dimers—mg/L, mean (sd) | 3.42 (5.33) | 2.03 (3.11) | 4.81 (6.67) | 0.091 | | PT activity %; mean (sd) | 72 (13.7) | 70 (9.5) | 73 (17.2) | 0.469 |
| | Haematological parameters on day of CDU | | | | | | Leukocyte count—109/L, mean (sd) | 11.8 (4.18) | 11.5 (3.81) | 12 (4.61) | 0.683 | | Lymphocyte count—109/L, mean (sd) | 1.17 (0.51) | 1.30 (0.55) | 1.04 (0.44) | 0.049 | | Neutrophil count—109/L, mean (sd) | 9.16 (3,65) | 8.70 (3,17) | 9.70 (3.85) | 0.361 | | Platelet count—109/L, mean (sd) | 344 (144) | 330 (153) | 359 (135) | 0.438 | | D-dimers—mg/L, mean (sd) | 4.45 (4.27) | 3.12 (2.02) | 5.90 (5.52) | 0.029 | | PT activity %; mean (sd) | 70 (8.8) | 68 (8.1) | 73 (8.9) | 0.034 |
| | Neutrophil fluorescence | | | | | | NEUT-SFL day 1—AU (sd) | 49.76 (3,07) | 49.99 (3.42) | 49.52 (3.16) | 0.555 | | NEUT-SFL day CDU—AU (sd) | 51.73 (3,72) | 52.34 (3.43) | 51.04 (3.55) | 0.178 |
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