Table 4 Proportion of patients with complications after lumbar disc herniation (LDH) surgery in relation to body mass index (BMI; g/cm2) class. Number of included patients 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 normal weighted patients as reference cohort. Statistically significant differences are bolded
Normal weight BMI 18.5–24.9 | Overweight BMI 25.0–29.9 | Obese BMI (≥ 30.0) | P-value | |
|---|---|---|---|---|
n1 = 4146 | n1 = 4052 | n1 = 1745 | ||
n2 = 4145 | n2 = 4050 | n2 = 1745 | ||
n3 = 4156 | n3 = 4063 | n3 = 1760 | ||
Complications registered by surgeon | ||||
- Dural tear (n = 9945)1 | 1.9% | 2.6% | 3.1% | 0.02 |
- Injury of nerve root (n = 9940)2 | 0.2% | 0.1% | 0.3% | 0.15 |
- Other & not specified (n = 9979)3 | 0.9% | 1.2% | 0.7% | 0.20 |
- All complications (n = 9979)3 | 3.0% | 3.9% | 3.9% | 0.047 |
Odds Ratio | OR compared to the reference cohort | OR compared to the reference cohort | ||
- All complication (n = 9979)3 | ––– | 1.3 (1.04, 1.7) | 1.3 (0.99, 1.8) | –- |
- Dural tear (n = 9945)1 | ––– | 1.4 (1.02, 1.8) | 1.6 (1.1, 2.3) | –- |