Variables | Patients with SSI (n = 21) | Patients without SSI (n = 491) | P valueb | Multivariate analysis* | ||
---|---|---|---|---|---|---|
OR | 95% CI | P value | ||||
Age, years | 66.00 (54.00–75.50) | 64.00 (46.00–73.00) | 0.482 | 1.018 | 0.987–1.051 | 0.260 |
Female sex | 10 | 260 | 0.661 | 0.987 | 0.381–2.559 | 0.979 |
BMIa, kg/m2 | 25.00 (21.72–30.23) | 23.70 (27.70–27.10) | 0.373 | 1.042 | 0.947–1.145 | 0.400 |
Obesity, | 10 | 200 | 0.651 | – | – | – |
Hypertension, N (%) | 7 | 170 | 1.000 | – | – | – |
Diabetes, N (%) | 3 | 99 | 0.780 | – | – | – |
Hyperlipidemia | 1 | 27 | 1.000 | – | – | – |
Chronic renal failure | 1 | 24 | 1.000 | – | – | – |
Steroid use | 3 | 15 | 0.033# | 3.104 | 0.677–14.227 | 0.145 |
Smoking | 0 | 27 | 0.618 | – | – | – |
ASA-PS ≥ 3 | 11 | 139 | 0.026# | 1.878 | 0.702–5.025 | 0.209 |
JOA scorea | 11.50 (7.00–13.50) | 13.20 (11.00–16.00) | 0.041* | 0.878 | 0.779–0.990 | 0.034 |
C-arm use | 4 | 52 | 0.271 | 0.921 | 0.107–7.921 | 0.940 |
O-arm use | 10 | 204 | 0.654 | 0.631 | 0.102–3.886 | 0.619 |
Both use | 3 | 33 | 0.177 | 0.628 | 0.064–6.136 | 0.619 |
Instrumentation | 16 | 211 | 0.003# | 6.241 | 1.113–34.985 | 0.037 |
Number of surgical levelsa | 4.00 (2.00–5.00) | 4.00 (2.00–5.00) | 0.274 | – | – | – |
Duration of Surgery, min | 266.00 (186.50–367.50) | 217.00 (154.25–321.75) | 0.123 | – | – | – |
Blood loss, ml | 330.00 (90.00–725.00) | 150.00 (50.00–400.00) | 0.260 | – | – | – |