Table 5.

Statistical analysis of the demographics and clinical data in group 1 (implant retention) and group 2 (implant removal)

Variable	Category	Group 1		Group 2		p-value
		No. of patients	Mean value	No. of patients	Mean value
Sex	Male	10		9		0.430
	Female	11		16
Age (yr)			65		65	0.691
Segments with instrumentation			7		6	0.470
ASA classification	ASA 1	0		2		0.445
	ASA 2	8		9
	ASA 3	8		10
	ASA 4	5		4
Primary disease	Neoplasm	5		2		0.286
	Degeneration	11		16
	Deformity	3		3
	Trauma	2		4
Infection timing	Early	18		14		0.031*
	Late	3		11
High white blood cell count	Yes	7		10		0.667
	No	12		13
C-reactive protein level (mg/L)			123		150	0.225
Infection type	Monomicrobial	11		17		0.377
	Polymicrobial	9		8
Fever	Yes	4		8		0.371
	No	16		17
Length of hospitalization (day)			43		67	0.021*
Complications	Yes	11		12		0.770
	No	10		13

ASA, American Society of Anesthesiologists.

^*p <0.05; statistically significant.