Table 2: Analysis of risk factors for surgical site infection in malignant bone and soft tissue tumors.

Non-SSI ( )SSI ( )Odds ratio95% CI value

Age 0.40
 Aged case (>60 y)73 (53.3%)12 (66.7%)1.620.57–4.570.36
Gender
(male/female)
66/636/120.480.16–1.350.16
BMI (kg/m2) 0.20
 Overweight (>25)40 (31.0%)7 (38.9%)1.410.51–3.920.50
Hypertension32 (25%)6 (33.0%)1.510.53–4.370.44
Ischemic heart disease4 (3.1%)4 (22.2%)10.42.31–47.00.001
Diabetes15 (11.6%)2 (11.1%)0.950.19–4.540.95
Tumor location
(Trunk/Extremity)
14/1114/141.760.52–5.950.36
Primary/metastatic tumor110/1915/31.150.30–4.380.99
Preoperative chemotherapy12 (9.3%)6 (33.3%)4.871.55–15.30.003
Skin incision (cm) 0.04
 Large skin incision (>25 cm)41 (31.8%)10 (55.6%)2.680.68–5.00.047
Use of artificial materials34 (26.4%)10 (55.6%)3.491.27–9.580.01
Reconstructive procedure42 (32.6%)6 (33.3%)1.040.37–2.950.95
Secondary wound closure25 (19.4%)3 (16.7%)0.830.22–3.100.78
Duration of surgery (min) 0.0002
 Prolonged surgery (≥355 min)32 (24.8%)12 (66.7%)6.062.10–17.40.0003
Blood loss (g) 0.0005
 Massive blood loss (≥190 g)23 (17.4%)9 (50.0%)4.391.47–13.00.005