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Table 2 Risk factors of 21 patients for early deep surgical site infection (SSI) after posterior lumbar fusion with instrumentation

From: The use of incisional vacuum-assisted closure system following one-stage incision suture combined with continuous irrigation to treat early deep surgical site infection after posterior lumbar fusion with instrumentation

Risk factors Number of patients %
Elderly (age >70 years) 8 38.1
Body mass index > 30 4 19.0
Smoking 5 23.8
Diabetes mellitus 6 28.6
Coronary artery disease 3 14.3
Chronic obstructive pulmonary disease 4 19.0
Anemia 2 9.5
Low serum albumin 4 19.0
Operation time > 3h 7 33.3
Perioperative blood loss > 500 ml 8 38.1