TABLE 1.
Demographic Characteristics and Surgical Details in the Study Cohort
| Demographics | Non-ASD n=54 | ASD n=31 | P |
|---|---|---|---|
| Age, y (mean±SD) | 47.1±11.6 | 54.2±10.4 | 0.007 |
| Sex (M/F) | 19/35 | 10/21 | 0.784 |
| BMI, kg/m2(mean±SD) | 27.3±5.1 | 28.5±4.8 | 0.264 |
| Pain (preoperative) | 6.8±2.2 | 7.8±1.7 | 0.048 |
| ODI (preoperative) | 44.4±18.1 | 48.1±14.3 | 0.326 |
| Pain (FU) | 4.6±2.9 | 6.5±2.5 | 0.004 |
| ODI (FU) | 27.0±20.3 | 38.4±21.8 | 0.020 |
| Surgical details | |||
| Length of fusion (1/2-level, %) | 41/13 (76%/24%) | 20/11 (65%/35%) | 0.261 |
| Upper/lower lumbar fusion (upper/lower, %) | 3/51 (6%/94%) | 8/23(26%/74%) | 0.007 |
| Inclusion of sacrum (yes/no, %) | 33/21 (61%/39%) | 16/15(51%/49%) | 0.394 |
Bold values represent significant P values <0.05. ASD indicates adjacent segment degeneration; BMI, body mass index; FU, follow-up; ODI, Oswestry disability index.