Table 1.
Baseline characteristics and outcome of study patients
| All patients | Patients with BSI | Matched patients | p-value* | Standardized mean difference | ||||
|---|---|---|---|---|---|---|---|---|
| n = 2464 | n = 71 | n = 213 | ||||||
| Age, years, median [IQR] | 64.9 | [55.2-73.4] | 64.8 | [53.1-70.4] | 63.7 | [55.2-62.0] | 0.85 | 0.47 |
| SAPS II, median [IQR] | 44 | [32-58] | 53 | [34-66] | 48 | [37-64] | 0.80 | 1.00 |
| Male – no. (%) | 1598 | (64.9) | 49 | (69.0) | 147 | (69.0) | 1 | 0.00 |
| Localization before admission | ||||||||
| Acute care ward – no. (%) | 914 | (37.1) | 31 | (43.7) | 87 | (40.9) | 0.78 | 0.03 |
| Home – no. (%) | 1439 | (58.4) | 36 | (50.7) | 111 | (52.1) | 0.94 | 0.01 |
| Long-term care facility– no. (%) | 31 | (1.3) | 2 | (2.8) | 9 | (4.2) | 0.86 | 0.01 |
| Other ICU – no. (%) | 53 | (2.2) | 1 | (1.4) | 4 | (1.9) | 0.75 | 0.00 |
| Reason for admission | ||||||||
| Trauma – no. (%) | 162 | (65.8) | 4 | (5.6) | 16 | (7.5) | 0.79 | 0.02 |
| Surgical – no. (%) | 496 | (20.1) | 17 | (23.9) | 54 | (25.4) | 0.94 | 0.01 |
| Medical – no. (%) | 1968 | (79.9) | 54 | (76.1) | 159 | (74.6) | 0.94 | 0.01 |
| Antibiotic before admission – no. (%) | 1434 | (58.2) | 42 | (59.2) | 136 | (63.9) | 0.57 | 0.00 |
| Immunosuppresion – no. (%) | 140 | (5.7) | 4 | (5.6) | 10 | (4.7) | 1 | 0.00 |
| Neutropenia (<500/mL) – no. (%) | 31 | (1.3) | 1 | (1.4) | 2 | (0.9) | 1 | 0.00 |
| Intubation during period at risk for BSI – no. (%) | 1731 | (70.3) | 65 | (91.6) | 196 | (92.0) | 1 | 0.00 |
| Catheter during period at risk for BSI – no. (%) | 1621 | (65.8) | 67 | (94.4) | 202 | (94.8) | 1 | 0.00 |
| Number of days at risk for BSI, days, median [IQR] | 4 | [1-9] | 6 | [3-12] | 6 | [2-11] | 0.64 | 0.06 |
| Lenght of stay in ICU, days, median [IQR] | 6 | [3-12] | 18 | [13-44] | 8 | [5-14] | <0.001 | |
| Death in ICU – no. (%) | 459 | (18.6) | 26 | (36.6) | 46 | (21.6) | 0.018 | |
ICU intensive care unit. *For comparison between patients with BSI and matched patients