Table 1 Baseline characteristics of adults patients admitted to the ICU during 2012–2017
Variable | Total (18,825) | Mean | SD |
|---|---|---|---|
Sex: male | 10,839 (57.6%) | ||
Age, years | 63.7 | 16.0 | |
Body mass index, kg m−2 | 23.6 | 3.9 | |
APACHE II | 20.3 | 9.8 | |
Comorbidities at ICU admission | |||
Hypertension | 8160 (43.3%) | ||
Diabetes mellitus | 1673 (8.9%) | ||
Ischemic heart disease | 447 (2.4%) | ||
Cerebrovascular disease | 856 (4.5%) | ||
Chronic obstructive lung disease | 836 (4.4%) | ||
Liver disease (LC, hepatitis, fatty liver) | 603 (3.2%) | ||
Dyslipidemia | 1191 (6.3%) | ||
Chronic kidney disease | 3236 (17.2%) | ||
Anemia (Hb < 10 g dl−1) | 6919 (36.8%) | ||
Cancer | 4001 (21.3%) | ||
Characteristics of ICU admission | |||
Admission through emergency department | 10,950 (58.2%) | ||
Admitting department | |||
Internal medicine | 3851 (20.5%) | ||
Neurologic center | 4770 (25.3%) | ||
Post-cardiothoracic surgery | 5765 (30.6%) | ||
Post-other surgery | 4438 (23.6%) | ||
Length of ICU stay, day | 3.4 | 10.6 | |
Length of hospital stay, day | 13.8 | 20.8 | |
pRBC transfusion within 72 h after ICU adm | 8294 (44.1%) | ||
RRT within 72 h after ICU adm | 458 (2.4%) | ||
Vasopressor infusion within 72 h after ICU adm | 3433 (18.2%) | ||
aCumulative fluid balance within 72 h after ICU adm | 3.2% | 4.7% | |
Negative (< 0%) | 3933 (20.9%) | ||
Even (0–5%) | 9680 (51.4%) | ||
Positive, Mild to moderate (5–10%) | 3889 (20.7%) | ||
Positive, Severe (> 10%) | 1323 (7.0%) | ||
Fluid administration for 72 h after ICU admission | |||
NaCl 0.9%, ml | 1729.1 | 2097.8 | |
Balanced crystalloid, ml | 521.9 | 871.2 | |
Hydroxyethyl starch, ml | 78.3 | 249.8 | |
Serum chloride (Cl−) in ICU, mmol L− 1 | |||
The number of measurements for 72 h after ICU adm | 3.3 | 0.9 | |
Cl− on ICU admission (baseline Cl−) | 103.7 | 5.6 | |
Normochloremia on ICU adm (97–110 mmol L−1) | 11,861 (63.0%) | ||
Hypochloremia on ICU adm (< 97 mmol L− 1) | 1753 (9.3%) | ||
Hyperchloremia on ICU adm (> 110 mmol L− 1) | 5211 (27.7%) | ||
Maximum Cl− within 72 h after ICU adm | 107.8 | 5.7 | |
Minimum Cl− within 72 h after ICU adm | 100.8 | 5.1 | |
bPositive fluctuation of Cl− for 72 h after ICU adm | 4.1 | 4.1 | |
> 10 mmol L−1 | 1243 (6.6%) | ||
cNegative fluctuation of Cl− for 72 h after ICU adm | 2.9 | 3.5 | |
> 10 mmol L−1 | 682 (3.6%) | ||
30-day mortality after ICU admission | 1011 (5.1%) | ||