Table 4.
Demographics and Outcomes Associated With Oswestry Disability Index (ODI).
| Preoperative ODI | |||
|---|---|---|---|
| Variable | Quartile 1 (>56) | Quartiles 2–4 | P-value |
| Age (years) | 67.1 (8.4) | 70.6 (7.1) | .003* |
| Gender (% female; n) | 79.6% (43) | 62.0% (93) | .018* |
| BMI (Kg/m2) | 28.3 (6.7) | 28.1 (5.4) | .77 |
| Index surgery Revision surgery |
63.0% (34) 37.0% (20) |
81.3% (122) 18.7% (28) |
.006* |
| Pelvic fixation (%) | 88.9% (48) | 93.3% (140) | .30 |
| Levels of fusion | 9.5 (3.0) | 9.2 (2.7) | .51 |
| Cobb angle (°) | 22.3 (14.3) | 27.0 (12.9) | .027* |
| SVA (cm) | 6.8 (4.9) | 5.7 (4.6) | .17 |
| Cobb LL (°) | 35.9 (18.6) | 37.5 (17.9) | .57 |
| SS (°) | 31.2 (13.0) | 28.4 (9.3) | [.14] |
| PT (°) | 25.1 (10.6) | 23.9 (9.3) | .44 |
| PI (°) | 53.7 (13.5) | 49.2 (12.3) | .030* |
| Smoking status | |||
| Current Former Never |
5.6% (3) 44.4% (24) 50.0% (27) |
2.7% (4) 40.7% (61) 56.7% (85) |
.49 |
| Alcohol use (% current) | 32.1% (17) | 51.0% (76) | .018* |
| ASA score | 2.7 (.4) | 2.6 (.6) | [.093] |
| Anesthesia duration (mins) | 288 (70) | 294 (75) | .57 |
| EBL (mL) | 1570 (710) | 1670 (1090) | [.44] |
| Intraoperative RBC transfusion (mL) | 1040 (733) | 1128 (1179) | [.53] |
| Intraoperative total transfusion (mL) | 1365 (1150) | 1559 (1809) | [.37] |
| Intraoperative albumin (mL) | 986 (494) | 1123 (672) | [.12] |
| Preoperative hemoglobin (g/dL) | 12.6 (1.6) | 13.3 (1.5) | .002* |
| ICU LOS (hrs) | 46.1 (37.0) | 41.0 (43.9) | .39 |
| Hospital LOS (days) | 6.5 (2.8) | 6.1 (3.5) | .47 |
| POD walking (days) | 2.9 (2.3) | 1.8 (2.0) | [.002]* |
| Postoperative RBC transfusions (mL) | 544 (526) | 651 (703) | .31 |
| Postoperative total transfusion volume (mL) | 639 (647) | 827 (997) | .20 |
| Postoperative hemoglobin (g/dL) | 9.9 (1.5) | 9.9 (1.6) | .98 |
| Hemoglobin drop (%) | 11.8% (1.7) | 12.6% (1.6) | .002* |
| Discharge disposition (% home) | 27.8% (15) | 38.3% (57) | .34 |
| 7-day readmission | 3.7% (2) | 2.0% (3) | .61 |
| 30-day readmission | 7.4% (4) | 9.3% (14) | .79 |
| 90-day readmission | 16.7% (9) | 16.0% (24) | .91 |
| Need for revision surgery (%) | 33.3% (18) | 33.3% (50) | >.99 |
| ODI change | −16.0 (14.6) | −9.0 (16.6) | .012* |
P-values in brackets represent non-parametric data analyzed with Welch’s t-test (*= P < .05). Abbreviations: Oswestry Disability Index (ODI), sagittal vertical axis (SVA), Cobb lumbar lordosis (LL), sacral slope (SS), pelvic tilt (PT), pelvic incidence (PI), and length of stay (LOS).