Table 3.
Importance of each predictor in the XGBoost model.
| Variable | Importance value |
| Forced expiratory volume in 1 second/forced vital capacity | 0.2824 |
| Smoking status | 0.0329 |
| Allergic symptoms (yes/no) | 0.0303 |
| Symptom-cough (yes/no) | 0.0294 |
| Smoking-pack year | 0.0222 |
| Hemoglobin A1c | 0.0197 |
| Albumin | 0.0195 |
| Mean corpuscular volume | 0.0177 |
| %Vital capacity | 0.0165 |
| %Forced expiratory volume in 1 second | 0.0164 |
| Treatment with an antidiabetic drug (yes/no) | 0.0162 |
| Allergic disease (yes/no) | 0.0146 |
| Hematocrit | 0.0144 |
| Urinary red blood cells | 0.0143 |
| Hemoglobin | 0.0138 |
| Age | 0.0128 |
| Smoking duration | 0.0127 |
| High density lipoprotein cholesterol | 0.0123 |
| Mean corpuscular hemoglobin concentration | 0.0122 |
| Total protein | 0.0118 |
| BMI | 0.0118 |
| Number of eosinophils | 0.0115 |
| Mean corpuscular hemoglobin | 0.0114 |
| Serum white blood cells | 0.0111 |
| Fasting blood sugar | 0.0110 |
| Serum alanine aminotransferase | 0.0108 |
| Pulse rate | 0.0108 |
| Forced expiratory volume in 1 second | 0.0107 |
| Urinary white blood cells | 0.0104 |
| Diastolic blood pressure | 0.0103 |