Background information of two groups of Iranian 18–24 years medical sciences students selected, caries free (n = 41) and those with DMFT ≥ 4 (n = 40).
Variables
Alternatives
Caries free n (%)
DMFT ≥ 4 n (%)
Gender
Male
24 (58.5)
17 (42.5)
Female
17 (41.5)
23 (57.5)
Father’s education
Academic
29 (70.7)
16 (40)
Nonacademic
12 (29.3)
24 (60)
Mother’s education
Academic
24 (58.5)
11 (27.5)
Nonacademic
17 (41.5)
29 (70.7)
Tooth brushing habit
Recommended tooth brushing habit (RTH)∗
12 (29.3)
9 (22.5)
Lack of RTH
29 (70.7)
31 (77.5)
Consumption of snacks containing sugar
Non-acceptable (once a day or more)
22 (53.7)
30 (75)
Acceptable (less than once a day)
19 (46.3)
10 (25)
Dental check up
By him/herself or none
22 (53.7)
6 (15)
By a dentist
19 (46.3)
34 (85)
Last dental check up
More than a year ago
23 (56.1)
12 (30)
Within the last year
18 (43.9)
28 (70)
Dentist as parents
Yes
3 (7.3)
0
No
38 (92.7)
40 (100)
The fluoride level of drinking water∗∗
Very low
29 (74.4)
13 (33.3)
Low
10 (25.6)
26 (66.7)
AMELX gene genotypes∗∗∗
TT
33 (80.5)
33 (82.5)
TC
6 (14.6)
6 (15)
CC
1 (2.4)
1 (2.5)
Not determined
1 (2.4)
0 (0)
ENAM gene genotypes
TT
34 (82.9)
39 (97.5)
TC
6 (14.6)
1 (2.5)
Not determined
1 (2.4)
0 (0)
∗Recommended tooth brushing habit (RTH) was defined as brushing more than once a day with regular or frequent use of fluoride toothpaste. ∗∗There were two missing values for this variable. ∗∗∗CC genotype was observed in only two of the study samples, which was excluded from analyses.
