Table IV. Continuous Variables.
| LOS ≤ 1 day | LOS > 1 day | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Continuous Variables | Mean | sd | Med | 25% | 75% | Mean | sd | Med | 25% | 75% | p |
| Body Mass Index (kg/m2) | 28.3 | 5.5 | 27.6 | 24.5 | 31.1 | 28.2 | 5.3 | 27.6 | 24.7 | 31.4 | .93 |
| Creatinine (mg/dl) Pre-op | 1.1 | 0.5 | 0.9 | 0.8 | 1.1 | 1.2 | 0.5 | 1.1 | 0.8 | 1.3 | .02 |
| Hemoglobin (g/dl) Pre-op | 13.7 | 1.6 | 13.9 | 12.9 | 15.0 | 13.3 | 1.8 | 13.5 | 12.1 | 14.6 | .11 |
| Right Peak Systolic Velocity | 302.0 | 185.7 | 328.5 | 110.5 | 453.0 | 281.9 | 170.9 | 253.0 | 124.0 | 419.0 | .74 |
| Right End Diastolic Velocity | 100.6 | 70.3 | 99.0 | 30.0 | 149.0 | 92.1 | 93.8 | 55.5 | 29.5 | 136.0 | .31 |
| Right ICA/CCA Ratio | 4.5 | 3.3 | 4.2 | 1.3 | 6.7 | 3.9 | 3.0 | 3.6 | 1.4 | 5.3 | .37 |
| Left Peak Systolic Velocity | 252.1 | 167.4 | 208.0 | 114.0 | 367.5 | 288.5 | 187.1 | 225.0 | 139.0 | 386.0 | .38 |
| Left End Diastolic Velocity | 89.1 | 76.9 | 57.5 | 34.0 | 113.0 | 97.4 | 80.7 | 79.0 | 37.0 | 128.0 | .57 |
| Left ICA/CCA Ratio | 3.2 | 3.0 | 2.2 | 1.1 | 4.7 | 4.3 | 3.4 | 3.1 | 1.2 | 7.6 | .23 |
| Heart Rate On Arrival to OR | 71.6 | 15.7 | 70.0 | 62.0 | 80.0 | 73.3 | 17.2 | 72.0 | 66.0 | 80.0 | .16 |
| Highest Intra-Op Heart Rate | 81.4 | 15.0 | 80.0 | 72.5 | 90.0 | 80.9 | 17.6 | 80.0 | 74.0 | 90.0 | .80 |
| Total Procedure Time (min) | 133.6 | 32.7 | 128.0 | 113.5 | 150.0 | 149.1 | 42.4 | 144.0 | 115.0 | 159.0 | .01 |
| Hospital Charges | 36000 | 13000 | 33000 | 29000 | 38000 | 57000 | 20000 | 47000 | 37000 | 64000 | <.001 |
| Hospital Cost | 9500 | 3500 | 8500 | 7500 | 10000 | 16000 | 6000 | 13000 | 10000 | 18000 | <.001 |
| Physician Charges | 5500 | 3000 | 6000 | 3500 | 6000 | 7000 | 3500 | 6500 | 5500 | 8000 | .10 |
The table above demonstrates the average, standard deviation, 25% and 75% ranges for continuous variables in addition to the p value calculated by Mann-Whitney U analysis for each variable. Statistically significant variable (p<0.05) are in bold.