Table 1.
Characteristics of patient population, days of ICU stay, and fluid parameters
| Entire cohort | Admission type | |||
|---|---|---|---|---|
| Medical | Elective surgery | Emergency surgery and trauma | ||
| n = 14,654 | n = 7052 (48.1%) | n = 4396 (30.0%) | n = 3206 (21.9%) | |
| Demographic and outcome data | ||||
| Female (%) | 6071 (41.4%) | 2810 (39.9%) | 1912 (43.5%) | 1349 (42.1%) |
| Age (mean in years ± SD) | 60.2 ± 16.4 | 62.4 ± 16.2 | 59.1 ± 14.9 | 56.8 ± 18.1 |
| Body weight (mean in kg ± SD) | 76.2 ± 17.8 | 76.6 ± 18.4 | 75.6 ± 16.9 | 76.3 ± 17.3 |
| SAPS-3 (mean ± SD) | 50.5 ± 17.4 | 59.5 ± 15.1 | 34.9 ± 10.4 | 52.3 ± 14.9 |
| Length of ICU stay (mean in days ± SD) | 5.9 ± 10.5 | 7.1 ± 11.6 | 3.0 ± 7.1 | 7.3 ± 10.9 |
| 28-day ICU mortality (n (%)) | 1616 (11.0%) | 1239 (17.6%) | 56 (1.3%) | 321 (10.0%) |
| Hospital mortalitya (n (%)) | 3208 (22.5%) | 1905 (33.6%) | 231 (6.9%) | 478 (18.5%) |
| Days of ICU stay | ||||
| Number of ICU days assessed | 103,098 | 58,408 (56.7%) | 17,667 (17.1%) | 27,023 (26.2%) |
| Mean duration of one ICU dayb (hours ± SD) | 20.3 ± 6.7 | 20.9 ± 6.3 | 17.7 ± 7.8 | 20.8 ± 6.5 |
| Duration of the median ICU day (hours (IQR)) | 24 (19–24) | 24 (24–24) | 24 (12–24) | 24 (24–24) |
| Median fluid input, output, and fluid balance [median in mL (IQR)] | ||||
| Total daily fluid input (for details: see Fig. 1) | 2296 (1422–3069) | 2283 (1458–3029) | 1912 (979–2736) | 2558 (1719–3324) |
| Total daily fluid output | 1790 (970–2680) | 1795 (970–2685) | 1445 (720–2270) | 2022 (1190–2910) |
| Urine output | 1420 (550–2300) | 1400 (485–2270) | 1115 (450–1895) | 1695 (795–2550) |
| Losses through drains | 0 (0–10) | 0 (0–0) | 10 (0–105) | 0 (0–60) |
| Losses through nasogastric tube | 0 (0–80) | 0 (0–65) | 0 (0–75) | 0 (0–100) |
| Daily fluid balance (all intake minus all output) | 316 (− 299 to 1064) | 327 (− 354 to 1111) | 259 (− 186 to 898) | 345 (− 269 to 1078) |
SD standard deviation, IQR interquartile range
aIf a patient was admitted more than once, only one admission counted for hospital mortality
bFirst day of admission runs from time of admission until 8:00 AM; day of discharge runs from 8:01 AM until time of discharge