Table 1.

Socio-demographic and dental characteristics of participants. Age, education and number of teeth are shown as mean ± standard deviation. N=229, except for AP, which N=129.

Variables	N (%)*
Socio-demographic
Age
years	53.23 ± 16.49
Gender
female	116 (51.1)
male	111 (48.9)
Ethnicity
white	219 (96.5)
others	007 (03.5)
Education
years	16.06 ± 2.57
Dental
Number of teeth	25.78 ± 4.42
Self-reported history of ET
yes	091 (39.7)
no	138 (60.3)
Number of teeth with ET present
zero	147 (64.3)
1	046 (20.1)
>1	036 (15.6)
Number of teeth with AP present
zero	106 (82.2)
1	017 (13.2)
>1	006 (04.6)

^(*)valid percentages.