Table 6: Descriptive Statistics of Local Anesthesia Drug Treatments
| Level of Treatment | N | Length of Stay | |
| Mean | Std Dev | ||
| S0 | 31 | 2.96774 | 0.65746 |
| S1 | 70 | 3.04286 | 0.76964 |
| S1S2 | 460 | 2.49783 | 0.90146 |
| S1S2S3 | 783 | 2.96296 | 0.90461 |
| S1S3 | 420 | 3.06667 | 0.97233 |
| S2S3 | 149 | 3.38926 | 1.20085 |
| S3 | 121 | 3.1157 | 0.95908 |