Table 2.
Results of the multivariable linear regression model predicting actual case duration. We included all features in the model. Because surgical procedure had 39 different procedures, we omitted the values from the table, however, they were included in the model.
|
|
Estimate | SE (minutes) | P value | |||
| Intercept | –61.89 | 119.13 | .60 | |||
| Specific surgical procedure included | ||||||
|
|
Kyphoplasty | –225.43 | 90.5 | .01 | ||
|
|
Discectomy | –33.94 | 94.7 | .72 | ||
|
|
Fusion | 6.17 | 75.9 | .94 | ||
|
|
Laminectomy | 218.51 | 41.7 | <.001 | ||
| Anterior approach involved | 102.06 | 93.6 | .28 | |||
| Number of spine levels involved | ||||||
|
|
1 | Reference | ||||
|
|
2 | 62.57 | 77.8 | .42 | ||
|
|
3 | –18.15 | 80.6 | .82 | ||
|
|
4 | 74.41 | 65.3 | .25 | ||
|
|
5 | 246.18 | 61.7 | <.001 | ||
|
|
6 | 212.36 | 106.7 | .04 | ||
|
|
7 | 445.13 | 143.1 | .002 | ||
| Surgeon performing procedure | ||||||
|
|
A | Reference | ||||
|
|
B | –38.37 | 13.1 | .003 | ||
|
|
C | 4.32 | 6.0 | .47 | ||
| Level of spine involved | ||||||
|
|
Cervical | 115.84 | 53.6 | .03 | ||
|
|
Thoracic | 26.56 | 34.6 | .44 | ||
|
|
Lumbar | 218.51 | 52.3 | <.001 | ||
| Male sex | 173.34 | 171.7 | .31 | |||
| BMI (kg/m2) | 0.38 | 0.52 | .47 | |||
| ASA PSa classification score | ||||||
|
|
1 | Reference | ||||
|
|
2 | 66.03 | 30.1 | .32 | ||
|
|
3 | 97.43 | 25.9 | <.001 | ||
|
|
4 | 29.98 | 30.1 | .32 | ||
| Unknown | 41.97 | 60.2 | .49 | |||
aASA PS: American Society of Anesthesiologists Physical Status.