Table 1 Patient demographics, admission data, and comorbidities at admission
|  | No EM n = 3076 | EM n = 1114 | p-value |
|---|---|---|---|
Sex (male) | 2176 (70.8) | 798 (71.6) | 0.61 |
Age | 63 [54, 71] | 60 [52, 69] |  < 0.001 |
Body mass index | 27.9 [25.3; 32.2] | 28.0 [24.9; 32.2] | 0.44 |
Chronic cardiac disease | 464 (15.3) | 179 (16.2) | 0.49 |
Chronic liver disease | 83 (2.7) | 23 (2.1) | 0.27 |
History of hypertension | 1529 (50.3) | 560 (50.4) | 0.98 |
Chronic neurological disease | 198 (6.5) | 58 (5.2) | 0.14 |
Chronic pulmonary disease | 281 (9.3) | 94 (8.5) | 0.47 |
Diabetes | 955 (31.5) | 359 (32.4) | 0.62 |
Asthma | 269 (8.8) | 80 (7.2) | 0.10 |
Malignancy | 165 (5.5) | 60 (5.4) | 0.99 |
Chronic kidney disease | 232 (7.6) | 66 (5.9) | 0.07 |
Immunosuppression | 154 (5.1) | 51 (4.6) | 0.55 |
Thromboembolic complications at admission | 106 (3, 4) | 48 (4, 3) | 0.22 |
Additional infection at admission | 440 (14.3) | 163 (14.6) | 0.84 |
Mechanical ventilation |  |  |  < 0.001 |
 Intubated at admission | 1669 (54.9) | 328 (30.3) |  |
 Intubated during stay | 1084 (35.7) | 432 (39.9) |  |
 Non-invasively ventilated during ICU stay | 286 (9.4) | 322 (29.8) |  |