Table E2.
Missingness of variables used in the analysis
| Variable | Total | Missing no. | Percent missing |
|---|---|---|---|
| Age at surgery, y, median (IQR) | 228 | 0 | 0.0 |
| Sex | 228 | 0 | 0.0 |
| Race | 228 | 60 | 26.3 |
| Ethnicity | 228 | 0 | 0.0 |
| Inpatient | 228 | 0 | 0.0 |
| Primary payor cat4 | 228 | 0 | 0.0 |
| Body mass index, median (IQR) | 228 | 54 | 23.7 |
| Hypertension | 228 | 0 | 0.0 |
| Congestive heart failure | 228 | 0 | 0.0 |
| Coronary artery disease | 228 | 0 | 0.0 |
| Myocardial Infarction preop | 228 | 0 | 0.0 |
| Afib per EKG within last year | 228 | 0 | 0.0 |
| Valvular heart disease | 228 | 0 | 0.0 |
| Pulmonary hypertension | 228 | 0 | 0.0 |
| Interstitial fibrosis or interstitial lung disease | 228 | 0 | 0.0 |
| Major vascular disease | 228 | 0 | 0.0 |
| Deep vein thrombosis/pulmonary embolism | 228 | 0 | 0.0 |
| Cerebrovascular history | 228 | 0 | 0.0 |
| Diabetes | 228 | 0 | 0.0 |
| Liver dysfunction | 228 | 0 | 0.0 |
| On dialysis | 228 | 0 | 0.0 |
| Coexisting cancer | 228 | 0 | 0.0 |
| Preoperative chemotherapy or immunotherapy | 228 | 0 | 0.0 |
| Preoperative thoracic radiation therapy | 228 | 0 | 0.0 |
| Previous cardiothoracic surgery | 228 | 0 | 0.0 |
| Preoperative history of home O2 | 228 | 0 | 0.0 |
| Smoking | 228 | 0 | 0.0 |
| Narcotic dependency | 228 | 0 | 0.0 |
| Alcohol abuse | 228 | 0 | 0.0 |
| Dementia or neurocognitive dysfunction | 228 | 0 | 0.0 |
| Major psychiatric disorder | 228 | 0 | 0.0 |
| ECOG score | 228 | 0 | 0.0 |
| Reoperation | 228 | 0 | 0.0 |
| Surgical approach conversion | 228 | 0 | 0.0 |
| Intraoperative packed RBCs | 228 | 0 | 0.0 |
| ASA classification | 228 | 0 | 0.0 |
| Time between surgery and survey, d | 228 | 0 | 0.0 |
| Surgery type | 228 | 0 | 0.0 |
| Surgical type | 228 | 0 | 0.0 |
| Open | 228 | 0 | 0.0 |
| Minimally invasive type | 228 | 0 | 0.0 |
| Thoracic versus abdominal cavity | 228 | 0 | 0.0 |
| Time in OR, h | 228 | 0 | 0.0 |
| Any pain medication before surgery | 228 | 0 | 0.0 |
| Any non-narcotic pain medication before surgery | 228 | 0 | 0.0 |
| Narcotics before surgery | 228 | 0 | 0.0 |
| Tylenol before surgery | 228 | 0 | 0.0 |
| Aleve before surgery | 228 | 0 | 0.0 |
| Motrin before surgery | 228 | 0 | 0.0 |
| Neurontin before surgery | 228 | 0 | 0.0 |
| Ultram before surgery | 228 | 0 | 0.0 |
| T#3 before surgery | 228 | 0 | 0.0 |
| Percocet before surgery | 228 | 0 | 0.0 |
| Norco before surgery | 228 | 0 | 0.0 |
| Fentanyl before surgery | 228 | 0 | 0.0 |
| Oxycodone before surgery | 228 | 0 | 0.0 |
| Morphine before surgery | 228 | 0 | 0.0 |
| Number of different pain medications before surgery | 228 | 0 | 0.0 |
| Number of different pain medications before surgery | 228 | 0 | 0.0 |
IQR, Interquartile range; Afib, atrial fibrillation; EKG, electrocardiogram; ECOG, Eastern Cooperative Oncology Group; RBC, red blood cell; ASA, American Society of Anesthesiologists; OR, operating room.