Table 3.

Background factors of patients with and without tooth extraction.

Variable		Without extraction	With extraction	p value
Age (years)		61.9 ± 11.7	63.6 ± 12.8	0.463
Primary site	Upper jaw	163	14	0.842
	Lower jaw	171	13
Duration of administration (days)		229 ± 637	412 ± 534	0.147
Number of teeth		11.3 ± 3.51	9.52 ± 3.96	0.011
Symptom of local infection	(−)	312	19	0.001
	(+)	22	8
Teeth that can be a source of infection	(-)	166	5	0.002
	(+)	168	22
Total		334 jaws	27 jaws