Table 2.
Association between patient-related predictor variables and outcome variable
| Variable | Coefficient | Standard error | t-statistic | p value |
|---|---|---|---|---|
| BMI | − 0.01 | 0.52 | − 0.02 | 0.98 |
| ASA | 8.95 | 7.96 | 1.12 | 0.26 |
| Smoking | 31.99 | 33.49 | 0.96 | 0.34 |
| Pre-operative opioid use | 15.89 | 15.07 | 1.05 | 0.29 |
| R-squared | 0.0052 | |||
| Adjusted R-squared | − 0.0001 | |||
No patient-related predictor variables were significantly associated with the outcome variable of case length differential (actual minus scheduled operating room time) by linear regression
BMI body mass index, ASA American Society of Anesthesiologists physical status classification