Table 2. Univariable and multivariable logistic regression interpreted as odds ratios (OR) with 95% confidence intervals (CI) for the main variables.
Both groups were compared with the control group. Also, patients with fracture or surgery in lumbar spine (L) were compared with control group separately. The models were adjusted by maternal smoking and diabetes during pregnancy.
| Caesarean section (fracture group) | Neonatal intensive care (fracture group) | Caesarean section (Fusion surgery group) | Neonatal intensive care (Fusion surgery group) | |
|---|---|---|---|---|
| OR (95% CI) | OR (95% CI) | OR (95% CI) | OR (95% CI) | |
| Univariable | 1.27 (1.17–1.36) | 1.23 (1.12–1.35) | 1.38 (1.28–1.48) | 1.14 (1.04–01.25) |
| Adjusted | 1.26 (1.17–1.34) | 1.18 (1.08–1.29) | 1.39 (1.30–1.49) | 1.12 (1.02–01.23) |
| Univariable (L)* | 1.35 (1.22–1.48) | 1.27 (1.13–1.44) | 1.46 (1.30–1.65) | 1.27 (1.09–1.48) |
| Adjusted (L) | 1.34 (1.21–1.48) | 1.23 (1.09–1.39) | 1.49 (1.32–1.68) | 1.26 (1.08–1.16) |
* L meaning only patients with fractures or fusion surgery for other reasons in the lumbar spine.