Table 2.
Mean values of measurements
| Surgical access | Vertical distance (mm) | Horizontal distance (mm) | Access window (mm2) | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Min | Max | Mean | SD | Var | p | Min | Max | Mean | SD | Var | p | Min | Max | Mean | SD | Var | p | |
| Not suitable | 0 | 4.3 | 1.2 | 1.6 | 2.6 | < 0.01 | 10.5 | 12.4 | 11.6 | 0.6 | 0.4 | < 0.01 | 0 | 39.6 | 11.8 | 15.9 | 251.3 | < 0.01 |
| Suitable | 5.2 | 13.4 | 10.1 | 2.9 | 8.1 | 11.5 | 13.1 | 12.3 | 0.5 | 0.2 | 51.7 | 131.1 | 101.5 | 30.3 | 919.1 | |||
| Total | 0 | 13.4 | 5.9 | 5.1 | 25.8 | 10.6 | 13.1 | 12.0 | 0.7 | 0.4 | 0 | 131.1 | 59.8 | 51.6 | 2662.8 | |||
The values for the vertical distance, horizontal distance, and access window are shown for not suitable rated access, suitable rated access, and in total. The p values of the unpaired t test, comparing the mean values of the vertical distances, horizontal distances, and access windows between the non-suitable and suitable groups, are also displayed. The measured vertical and horizontal distances are presented in millimeters (mm), and the values for the access windows are presented in millimeters squared (mm2)
Max maximum, Min minimum, SD standard deviation, Var variance