Table 2.
Multivariable Regression Results for Total OR Time
| Variable | Total OR Time | ||
|---|---|---|---|
| Impact in Minutes | 95 % CI | P value | |
| BMI (10 unit increments) | + 7.2 a | 4.8 – 8.4 | <0.001 |
| Age (10 year increments) | − 2.4 | −2.2 – −4.1 | <0.001 |
| Male Gender | + 19.2 | 16.1 – 20.2 | <0.001 |
| Race | |||
| White (reference) | 0 | -- | -- |
| African American | + 7.2 | 3.6 – 10.8 | 0.001 |
| Other | − 2.4 | −7.4 – +2.2 | 0.285 |
| Total Number of Comorbidities | + 2.4 | 0.7 – 2.6 | 0.002 |
| Zubrod Score | |||
| 0 (reference) | 0 | -- | -- |
| 1 | + 4.8 | 1.9 – 6.2 | <0.001 |
| 2 | + 4.8 | 1.0 – 7.9 | 0.014 |
| >3 | − 2.4 | −12.2 – +7.2 | 0.587 |
| Smoking Status | |||
| Never (reference) | 0 | -- | -- |
| Former | + 2.4 | −0.7 – +5.0 | 0.154 |
| Current | + 4.8 | 0.2 – 7.0 | 0.036 |
| Preoperative Chemotherapy | + 12 | 5.8 – 16.3 | <0.001 |
| Preoperative Radiation Therapy | + 16.8 | 10.1 – 23.5 | <0.001 |
| Steroid Use | − 2.4 | −7.9 – +2.4 | 0.305 |
| FEV1 Predicted, % | − 2.4 | −1.7 – −0.7 | <0.001 |
| Thoracotomy | − 4.8 | −2.6 – −7.2 | <0.001 |
| Mediastinoscopy | + 52.8 | 48 – 55.7 | <0.001 |
| Wedge Resection | + 12 | 9.6 – 14.9 | <0.001 |
a
Every 10 unit increase in BMI was associated with a 7.2 minute average increase in total OR time; BMI – body mass index; CI – confidence interval; FEV1 – forced expiratory volume in one second; OR – operating room