Table 2.
Variables assignment table for analysis of extubation risk factors in patients with craniocerebral injury.
| Variable name | Assignment | Variable type |
|---|---|---|
| Age | 1 = <65 years old; 2 = ≥65 years old | Binary variable |
| Gender | 1 = Male; 2 = Female | Binary variable |
| BMI | 1 = <18.5 kg/m2; 2 = 18.5 ~ 23.9 kg/m2; 3 = ≥24.0 kg/m2 | Ordinal variable |
| APACHE II score | 1 = <15 points; 2 = ≥15 points | Binary variable |
| Diabetes | Yes/No (1 = Yes; 0 = No) | Binary variable |
| Hypertension | Yes/No (1 = Yes; 0 = No) | Binary variable |
| Coronary heart disease | Yes/No (1 = Yes; 0 = No) | Binary variable |
| Cerebrovascular Disease | Yes/No (1 = Yes; 0 = No) | Binary variable |
| COPD | Yes/No (1 = Yes; 0 = No) | Binary variable |
| Surgical treatment | Yes/No (1 = Yes; 0 = No) | Binary variable |
| Smoking history | Yes/No (1 = Yes; 0 = No) | Binary variable |
| Use of steroids before extubation | Yes/No (1 = Yes; 0 = No) | Binary variable |
| Enteral nutrition interruption | Yes/No (1 = Yes; 0 = No) | Binary variable |
| Sputum volume (suctioning frequency) | 3= > 3time/h；2 = 2 ~ 3time/h；1 = ≤1time/h | Ordinal variable |
| Cough strength | 3 = Strong；2 = Moderate；1 = Weak | Ordinal variable |
| Swallowing function (SAA Score) | 4 = 18 ~ 24；3 = 25 ~ 31；2 = 32 ~ 38；1 = 39 ~ 46 | ordinal variable |
| SBT test | 1 = Pass; 0 = Fail | Binary variable |
| Leak test | 1 = Pass; 0 = Fail | Binary variable |
| Oxygenation index | 0 ≥ 300; 1<300 | Binary variable |
| Heart rate | 1 = <60 beats/min; 2 = 60–100 beats/min; 3 = >100 beats/min | Ordinal variable |
| GCS score | 1 = <8 points; 2 = 8 ~ 15 points | Binary variable |
| Respiratory rate | 1 = <18 breaths/min; 2 = ≥18 breaths/min | Binary variable |
| Body temperature | 1 = <36.5°C; 2 = 36.5–36.9°C; 3 = 37–37.9°C; 4 = ≥38°C | Ordinal variable |