Table 1.
Patient Baseline Characteristics
| Variable | No. (% of all patients) | Mean ± Standard Deviation |
|---|---|---|
| Total | 27,844 (100%) | |
|
| ||
| Age, years | 67.2 ± 10.1 | |
|
| ||
| Male gender (%) | 12,647 (45.4%) | |
|
| ||
| Race | ||
| White | 24,099 (87.0%) | |
| Black | 2,369 (8.6%) | |
| Other | 1,217 (4.4%) | |
|
| ||
| Body mass index (kg/m2)* | 27.6 ± 6.2 | |
|
| ||
| Coronary artery disease | 6,196 (22.3%) | |
|
| ||
| Diabetes | 5,158 (18.5%) | |
|
| ||
| Renal dysfunction | 504 (1.8%) | |
|
| ||
| Induction chemotherapy and/or radiation | 1,801 (6.5%) | |
|
| ||
| Cigarette smoking | ||
| Never | 3,895 (14.0%) | |
| Past (stopped more than 1 month) | 17,368 (62.4%) | |
| Current | 6,581 (23.6%) | |
|
| ||
| Steroids | 965 (3.5%) | |
|
| ||
| Minimally invasive | 17,153 (61.6%) | |
|
| ||
| Thoracotomy | 10,691 (38.4%) | |
|
| ||
| Primary procedure | ||
| Wedge resection | 3,815 (13.7%) | |
| Segmentectomy | 1,685 (6.1%) | |
| Lobectomy | 19,836 (71.2%) | |
| Sleeve lobectomy | 412 (1.5%) | |
| Bilobectomy | 980 (3.5%) | |
| Pneumonectomy | 1,116 (4.0%) | |
*
Missing values imputed to median by gender