Table 7 Proportion of obese patients with complications after lumbar disc herniation (LDH) surgery in relation to body mass index (BMI; g/cm2) class. Number of patients included for each variable are presented as n1 to n3. Data are presented as proportions (%) and Odds Ratio [(Exp(B)] with 95% confidence intervals in brackets. All ORs are calculated using the proportion that reached improvement ≥ MCID among obese class I patients as reference cohort
Obese class I BMI 30.0–34.9 | Obese class II BMI 35.0–39.9 | Obese class III BMI ≥ 40.0 | P-value | |
|---|---|---|---|---|
n1 = 1373 | n1 = 317 | n1 = 57 | ||
n2 = 1372 | n2 = 316 | n2 = 57 | ||
n3 = 1384 | n3 = 317 | n3 = 59 | ||
Complications registered by surgeon | ||||
- Dural tear (n = 1747)1 | 3.0% | 3.5% | 3.5% | 0.72 |
- Injury of nerve root (n = 1745)2 | 0.4% | 0.3% | - | 1.00 |
- Other & not specified (n = 1760)3 | 0.7% | 1.3% | - | 0.54 |
- All complications (n = 1760)3 | 3.8% | 4.4% | 3.5% | 0.90 |
Odds Ratio | OR compared to the reference cohort | OR compared to the reference cohort | ||
- All complications (n = 1760)3 | ––- | 1.2 (0.6, 2.1) | 0.9 (0.2, 3.7) | – |
- Dural tear (n = 1747)1 | ––– | 1.2 (0.6, 2.3) | 1.2 (0.3, 5.0) | – |