Table 1 Characteristics of the cohort a
Characteristics | All patients (N = 1,040) | No selenium (n = 627) | Selenium (n = 413) | P-value |
|---|---|---|---|---|
Age, (yr), mean ± SD | 67 ± 16 | 67 ± 17 | 67 ± 14 | 0.685 |
Male, n (%) | 701 (67.4) | 416 (66.3) | 285 (69.0) | 0.371 |
Severity scores, mean ± SD |  |  |  |  |
 SAPS II, mean ± SD | 48.9 ± 17.3 | 47.7 ± 17 | 50.8 ± 17.7 | 0.001 |
 SOFA, mean ± SD | 8.2 ± 3.5 | 8.2 ± 3.6 | 8.2 ± 3.4 | 0.732 |
Type of surgery, n (%) | Â | Â | Â | Â |
 Gastrointestinal | 424 (40.8) | 204 (32.5) | 220 (53.3) | <0.001 |
 Cardiothoracic | 326 (31.3) | 228 (36.4) | 98 (23.7) | <0.001 |
 Trauma | 48 (4.6) | 35 (5.6) | 13 (3.1) | 0.067 |
 Others | 242 (23.3) | 160 (25.5) | 82 (19.9) | 0.3 |
Comorbidities, n (%) | Â | Â | Â | Â |
 Arterial hypertension | 435 (41.8) | 259 (41.3) | 176 (42.6) | 0.676 |
 Diabetes mellitus | 264 (25.4) | 153 (24.4) | 111 (26.9) | 0.37 |
 Cancer | 288 (27.7) | 154 (24.6) | 134 (32.4) | 0.005 |
 Cirrhosis | 71 (6.8) | 39 (6.2) | 32 (7.7) | 0.339 |
 Chronic renal failure | 135 (13) | 79 (12.6) | 56 (13.6) | 0.652 |
Source of sepsis, n (%) | Â | Â | Â | Â |
 Respiratory | 445 (42.8) | 315 (50.2) | 130 (31.5) | <0.001 |
 Gastrointestinal | 430 (41.3) | 206 (32.9) | 224 (54.2) | <0.001 |
 Cardiothoracic | 47 (4.5) | 32 (5.1) | 15 (3.6) | 0.264 |
 Wound | 33 (3.2) | 19 (3.0) | 14 (3.4) | 0.746 |
 Urogenital | 23 (2.2) | 12 (1.9) | 11 (2.7) | 0.421 |
 Bloodstream | 11 (1.1) | 6 (1.0) | 5 (1.2) | 0.761 |
 Catheter | 8 (0.8) | 7 (1.1) | 1 (0.2) | 0.156 |
 No focus identified | 2 (0.2) | 1 (0.2) | 1 (0.2) | 1.000 |
 CNS | 4 (0.4) | 2 (0.3) | 2 (0.5) | 0.652 |
 Others | 37 (3.6) | 27 (4.3) | 10 (2.4) | 0.108 |