Table 1.
Baseline characteristics of enrolled patients.
| Group | Successful extubation | Failed weaning | p value | ||
|---|---|---|---|---|---|
| Number | Numer | ||||
| Gender (%) | 0.267 | ||||
| Female | 48 | 34.3% | 54 | 38.6% | |
| Male | 92 | 65.7% | 86 | 61.4% | |
| Age | 140 | 65.7 ± 17.9 | 140 | 68.9 ± 15.8 | 0.164 |
| Height (cm) | 140 | 162.3 ± 9.4 | 140 | 161.6 ± 9.1 | 0.458 |
| Studied group (%) | 0.141 | ||||
| Medical | 69 | 49.3% | 79 | 56.4% | |
| Surgical | 71 | 50.7% | 61 | 43.6% | |
| Subspecialty (%) | 0.031* | ||||
| Nephrology | 16 | 11.4% | 10 | 7.1% | |
| Chest/chest surgery | 31 | 22.1% | 38 | 27.1% | |
| Neurology/neurosurgery | 64 | 45.7% | 50 | 35.7% | |
| Gastroenterology | 10 | 7.1% | 6 | 4.3% | |
| Cardiology/cardiovascular surgery | 10 | 7.1% | 10 | 7.1% | |
| General surgery | 4 | 2.9% | 6 | 4.3% | |
| Hematology and oncology | 5 | 3.6% | 20 | 14.3% | |
| Initial primary data | |||||
| Weight (kg) | 140 | 63.2 ± 14.7 | 140 | 60.6 ± 12.2 | 0.260 |
| BMI (kg/m2) | 140 | 23.9 ± 4.96 | 140 | 23.2 ± 4.15 | 0.256 |
| APACHE II score | 140 | 18.3 ± 3.6 | 140 | 19.9 ± 4.6 | 0.005** |
| Energy delivery (kcal/kg/day) | 140 | 23.8 ± 7.8 | 140 | 24.5 ± 7.9 | 0.092 |
| Protein intake (g/kg/day) | 140 | 0.97 ± 0.36 | 140 | 1.01 ± 0.37 | 0.096 |
| Initial laboratory values | |||||
| Albumin (g/dl) | 134 | 3.16 ± 0.60 | 128 | 3.04 ± 0.61 | 0.193 |
| Prealbumin(mg/dl) | 50 | 19.7 ± 7.32 | 43 | 17.8 ± 7.87 | 0.309 |
| Hemoglobin (g/dl) | 123 | 10.7 ± 2.26 | 133 | 9.8 ± 1.87 | 0.011* |
| BUN (mg/dl) | 135 | 34.0 ± 27.9 | 134 | 43.6 ± 36.0 | 0.011* |
| Creatinine (mg/dl) | 138 | 1.72 ± 2.24 | 140 | 1.80 ± 1.76 | 0.161 |
| Potassium (mmol/l) | 138 | 4.10 ± 0.58 | 140 | 4.12 ± 0.74 | 0.840 |
| Calcium (mg/dl) | 68 | 8.25 ± 0.78 | 77 | 8.54 ± 0.96 | 0.136 |
| Magnesium (mg/dl) | 62 | 2.29 ± 0.46 | 57 | 2.35 ± 0.45 | 0.626 |
| Phosphorus (mg/dl) | 64 | 5.37 ± 2.09 | 56 | 3.47 ± 1.92 | 0.013* |
| CRP (mg/dl) | 138 | 4.85 ± 5.27 | 138 | 7.06 ± 6.82 | 0.004** |
Continuous data are expressed as mean ± SD and categorical data are expressed as n (%). The p values are from Pearson chi-square test for categorical variables and from independent t test for continuous variables. The p values are from the Mann–Whitney U test for laboratory data. *p values < 0.05 and **p values < 0.01 are considered statistically significant and extremely significant, respectively.
BMI Body Mass Index, APACHE II score Acute physiology assessment and chronic health evaluation II score, BUN blood urea nitrogen, CRP high sensitivity C reactive protein.