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Table 1 Baseline characteristics and clinical and laboratory parameters in the training dataset

From: Predictive model for acute respiratory distress syndrome events in ICU patients in China using machine learning algorithms: a secondary analysis of a cohort study

Variable Non-ARDS (n = 160) ARDS (n = 76) P value
Age (year) 63.89 ± 18.00 68.07 ± 17.86 0.096
Sex (male) 108 (67.5%) 59 (77.6%) 0.127
Bacteraemia 2 (1.25%) 2 (2.63%) 0.596
Sepsis 127 (79.4%) 64 (84.2%) 0.479
Septic shock 55 (34.4%) 30 (39.5%) 0.470
Pneumonia 84 (52.5%) 43 (56.6%) 0.579
Vasopressora 69 (43.1%) 35 (46.1%) 0.677
Fracture 3 (1.88%) 1 (1.32%) 1.000
Pulmonary contusion 0 (0%) 3 (3.95%) 0.033*
Aspiration 5 (3.13%) 5 (6.58%) 0.299
Multiple transfusion 15 (9.38%) 9 (11.84%) 0.646
Previous ARDS 0 (0%) 2 (2.63%) 0.103
Autoimmune disease 0 (0%) 0 (0%)
Diabetes 30 (18.75%) 12 (15.79%) 0.716
Previous sepsis 0 (0%) 1 (1.32%) 0.322
Tobacco 53 (33.13%) 32 (42.11%) 0.194
Familial diabetes mellitus 13 (8.13%) 3 (3.95%) 0.280
Leukaemia 0 (0%) 1 (1.32%) 0.322
Dialysis 3 (1.88%) 2 (2.63%) 0.658
Metastatic solid tumour 8 (5%) 2 (2.63%) 0.507
Immunosuppression 1 (0.63%) 0 (0%) 1.000
Hepatic encephalopathy 1 (0.63%) 0 (0%) 1.000
Hepatocirrhosis 2 (1.25%) 0 (0%) 1.000
Alcohol abuse for 12 months 18 (11.25%) 7 (9.21%) 0.821
APACHE II score 19.98 ± 5.77 19.92 ± 5.94 0.947
PH 7.38 ± 0.09 7.37 ± 0.11 0.509
Minimum systolic pressure 102.45 ± 20.62 92.97 ± 18.70 0.001*
Maximum systolic pressure 140.76 ± 23.17 138.20 ± 26.63 0.450
Minimum MAP 78.25 ± 72.22 69.20 ± 14.88 0.281
Maximum MAP 98.21 ± 16.92 97.53 ± 17.76 0.777
Minimum heart rate 91.41 ± 16.80 87.04 ± 18.85 0.074
Maximum heart rate 122.19 ± 20.30 122.62 ± 23.18 0.886
Minimum respiratory rate 22.22 ± 4.65 25.08 ± 4.40 0.000*
Maximum respiratory rate 31.08 ± 5.70 34.50 ± 6.23 0.000*
Minimum temperature 36.73 ± 0.92 36.63 ± 0.79 0.412
Minimum creatinine 1.44 ± 1.43 1.36 ± 0.98 0.655
Maximum creatinine 1.56 ± 1.49 1.50 ± 1.07 0.754
Minimum glucose 140.32 ± 104.32 123.79 ± 58.33 0.199
Minimum haematocrit 30.13 ± 6.37 29.13 ± 7.10 0.282
Minimum white blood cell count 11.55 ± 5.72 12.63 ± 7.20 0.253
Minimum sodium 140.67 ± 6.34 138.80 ± 6.25 0.034*
Minimum potassium 3.97 ± 0.68 3.89 ± 0.55 0.366
  1. The binary variables are described as counts and percentages and were evaluated by the Chi-squared test or Fisher’s exact test. Continuous variables of each group are presented as the mean ± SEM. Student’s t-test was used to compare the normally distributed continuous variables
  2. ARDS acute respiratory distress syndrome, MAP mean arterial pressure, APACHE II Acute Physiology and Chronic Health Evaluation II
  3. *P < 0.05, ARDS compared with non-ARDS
  4. aVasopressor use before and 24 h after entering the ICU