Table 2. Descriptive statistics.

Factor	Df	SumsOfSqs	MeanSqs	F.Model	R2 (% of Variation Distance)	Pr(>F)	Code
Class (caries/healthy)	1	3.71	3.71	23.35	0.30	0.001	***
Smoker (yes/no)	1	0.74	0.74	3.48	0.06	0.007	**
Caries experience of parents (yes/no)	1	0.34	0.34	1.54	0.03	0.146
Caries experience of siblings (yes/no)	1	0.42	0.42	1.93	0.03	0.111
Dental visits per year	1	0.14	0.14	0.64	0.01	0.649
DMFT	1	3.20	3.20	19.05	0.26	0.001	***
Dt	1	1.50	1.50	7.48	0.12	0.001	***
Mt	1	1.78	1.78	9.14	0.14	0.002	**
Ft	1	2.63	2.63	14.71	0.21	0.001	***
Fluoride tablets childhood (yes/no)	1	0.91	0.91	4.34	0.07	0.003	**
Fluoride salt childhood (yes/no)	1	0.65	0.65	3.00	0.05	0.023	*
Dental hygiene (times/day)	1	0.19	0.19	0.83	0.02	0.482
Dental hygiene (minutes/tooth brushing)	1	0.25	0.25	1.10	0.02	0.353
Chlorhexidine use (yes/no)	1	0.22	0.22	0.99	0.02	0.339
Fluoride use (yes/no)	1	0.48	0.48	2.18	0.04	0.066	.
Tea consumption (yes/no)	1	0.36	0.36	1.62	0.03	0.163
Sugar intake (times/day)	1	0.29	0.29	1.29	0.02	0.263
Whole food (yes/no)	1	0.25	0.25	1.13	0.02	0.325
Vegetarian (yes/no)	1	0.17	0.17	0.74	0.01	0.562
Use of chewing gum (yes/no)	1	0.13	0.13	0.58	0.01	0.713
Use of xylitol (yes/no)	1	0.06	0.06	0.26	0.00	0.937
Use of calcium containing products (yes/no)	1	0.16	0.16	0.70	0.01	0.630
Use of probiotics (yes/no)	1	0.25	0.25	1.13	0.02	0.324

Descriptive statistics on class, dental status and epidemiologic parameters; epidemiological parameters were gained by questionnaires; clinical data was extracted from records. Codes *, **, *** represent p≤0.05, 0.05>p<0.001, and p≤0.001, respectively.