Usage of procalcitonin and sCD14-ST as diagnostic markers for postoperative spinal infection

Journal of Orthopaedics and Traumatology

Official Journal of the Italian Society of Orthopaedics and Traumatology

Table 2 Risk factors for infection after spinal surgery

Grouping criteria		No. of patients	Infected cases	Infection rate (%)	χ²	P*
Days in hospital (days)	≥ 15	335	30	8.95	8.769	0.001
Days in hospital (days)	< 15	155	4	2.58	8.769	0.001
Operation time (min)	≥ 3	363	31	8.53	7.389	0.002
Operation time (min)	< 3	127	3	2.36	7.389	0.002
Antibiotic use (days)	≥ 10	285	27	9.47	8.650	0.004
Antibiotic use (days)	< 10	205	8	3.84	8.650	0.004
Implant placement	Y	353	30	8.49	8.843	0.002
Implant placement	N	137	4	2.91	8.843	0.002
Concurrent diabetes	Y	299	30	10.03	13.961	0.001
Concurrent diabetes	N	191	4	2.09	13.961	0.001
Indwelling catheterization	Y	480	34	7.08	0.761	0.382
Indwelling catheterization	N	10	0	0	0.761	0.382