Table 2.
Logistic regression model and Cox regression model results considering ASDe and ASDi, respectively, as depending variable
| Variable | Logistic regression model (ASDe) | Cox regression model (ASDi) |
|---|---|---|
|
|
|
|
| OR (95% CI) | HR (95% CI) | |
| Age | 1.008 (0.969–1.048) | 1.029 (0.963–1.1) |
|
| ||
| Gender (female) | 1.442 (0.54–3.849) | 2.915 (0.442–19.222) |
|
| ||
| Body mass index | 1.005 (0.902–1.118) | 0.889 (0.748–1.058) |
|
| ||
| Smoker (yes) | 1.045 (0.411–2.656) | 1.49 (0.276–8.043) |
|
| ||
| Pffirman preoperative classification of adjacent segment | 5.323 (1.055–26.85) | 1.199 (0.128–11.258) |
|
| ||
| Preoperative L1–S1 Cobb angle | 1.005 (0.942–1.073) | 0.942 (0.853–1.041) |
|
| ||
| Preoperative pelvic incidence | 0.811 (0.364–1.806) | 1.191 (0.799–1.777) |
|
| ||
| Preoperative pelvic tilt | 1.215 (0.549–2.687) | 0.776 (0.509–1.184) |
|
| ||
| Preoperative sacral slope | 1.153 (0.518–2.566) | 0.822 (0.547–1.235) |
|
| ||
| Preoperative UCLA classification of adjacent segment | 0.185 (0.03–1.13) | 7.44 (0.747–74.141) |
|
| ||
| One-level fusion (vs. two-level fusion) | 0.996 (0.393–2.525) | 2.233 (0.581–8.592) |
|
| ||
| Use of topping-off technique (DRC or ISD) | 1.229 (0.458–3.303) | 0.154 (0.031–0.773) |
Statistically significant differences are shown in bold.
ASDe, adjacent segment degeneration; ASDi, adjacent segment disease (according to criteria defined in methods section); OR, odds ratio; CI, confidence interval; HR, hazard ratio; DRC, dynamic rods construct; ISD, interspinous device.