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ICD-9 codes for pulmonary complications and predictor variable
| Pulmonary complications | ICD-9 codes |
| Ventilator support | 96.7, 96.70, 96.71, 96.72 |
| Respiratory failure | 518.81, 518.82, 518.84 |
| Pulmonary embolism | 415.1 |
| Acute respiratory distress syndrome | 518.5 |
| Ventilator-associated pneumonia | 997.31 |
| Predictor variable | |
| Obstructive sleep apnea | 327.2, 327.23, 327.29, 780.51, 780.53, 780.57 |
ICD-9, International Classification of Diseases, Ninth Revision, Clinical Modification.
