Table 2.
Comparison of 1- and 2-Year Cohorts.
| Variable | 1-year N = 157 | 2-year N = 88 | P-value |
|---|---|---|---|
| Age, mean ± SD | 50.9 ± 17.5 | 53.1 ± 16.8 | .339 |
| Female, n (%) | 105 (67%) | 62 (71%) | .512 |
| ASA, n (%) 1 / 2 / 3 |
15 (10%) / 97 (62%) / 45 (28%) |
8 (9%) / 57 (65%) / 23 (26%) |
each > .05 |
| BMI, mean ± SD | 25.6 ± 5.8 | 25.8 ± 6.5 | .805 |
| Depression, n (%) | 31 (20%) | 18 (21%) | .852 |
| Diagnosis, n (%) | |||
| AdIS | 82 (52%) | 41 (47%) | .652 |
| Degenerative | 75 (48%) | 47 (53%) | |
| Revision, n (%) | 94 (60%) | 66 (62%) | .758 |
| Preop SVA (cm), mean ± SD (range) | 3.6 ± 6.4 ( −8.8, 24.8) | 3.7 ± 6.3 ( −7.9, 23.2) | .906 |
| Preop CVA (cm), mean ± SD (range) | 2.8 ± 2.6 (0.1,19.8) | 2.9 ± 2.9 (0.1, 20.0) | .782 |
| Max Cobb (°), mean ± SD (range) | 42.6 ± 26.3 (1.2, 131.7) | 40.5 ± 25.6 (1.2, 108.3) | .546 |
| TIL, mean ± SD (range) | 13.4 ± 4.0 (6-25) | 13.1 ± 4.6 (6-25) | .594 |
| 3CO, mean ± SD (range) | 22 (14%) | 15 (17%) | .529 |
| Operative time, mean ± SD (range) | 469.9 ± 130.7 (135-924) | 461.9 ± 138.9 (135-924) | .654 |
| EBL, mean ± SD | 1263.5 ± 777.3 | 1258 ± 879.6 | .960 |
| LOS, mean ± SD | 7.5 ± 7.0 | 7.2 ± 6.3 | .739 |
| Complication, n (%) | 29 (19%) | 16 (18%) | .847 |
| Reoperation, n (%) | 24 (15%) | 15 (17%) | .680 |