The Prevalence of Tonsilloliths and Other Soft Tissue Calcifications in Patients Attending Oral and Maxillofacial Radiology Clinic of the University of Iowa

Table 10

Mean values of observations for the control group.

Variables	Subjects (𝑁)	Mean	Standard deviation	Minimum	Maximum	Median
Last tonsillitis (weeks)	2	30.00	31.11	8.00	52.00	30.00
Episodes of tonsillitis per year	2	1.00	0.00	1.00	1.00	1.00
When quit smoking (weeks)	1	104.00	0.00	104.00	104.00	104.00
Number of cigarettes per day	2	6	1.41	5.00	7.00	6.00
Last clean (weeks)	10	43.50	46.22	2.00	156.00	52.00
Size of tonsiliths (mm)	0	0.00	0.00	0.00	0.00	0.00
Age of subjects (yr)	10	43.20	22.99	17.00	83.00	39.00