# Table 2 Multinomial logistic regression of the factors associated with early childhood caries (group with few lesions and high caries group) in a hierarchical model

Groups/Variables Block 1   Block 4   Block 5   Block 6
PR (95% CI) p PR (95% CI) p PR (95% CI) p PR (95% CI) p
Few caries group
Age 1.06 (1.00-1.12) 0.054
Child has visited the dentist
No    1
Yes    0.20 (0.05-0.89) 0.035
Frequency of sucrose consumption between main meals
≤3      1
>3      0.83 (0.28-2.42) 0.732
Use of a night bottle
No      1
Yes      0.42 (0.16-1.08) 0.073
Nighttime breastfeeding after 1 year
No      1
Yes      0.33 (0.11-1.01) 0.051
Who does the teeth brushing
The child alone        1
The caregivers        0.27 (0.11-0.66) 0.004
High caries group
Age 1.10 (1.01-1.20) 0.026
Child has visited the dentist
No    1
Yes    1.05 (0.36-3.09) 0.932
Frequency of sucrose consumption between main meals
≤3      1
>3      4.65 (1.83-11.84) 0.001
Use of a night bottle
No      1
Yes      0.57 (0.18-1.85) 0.353
Nighttime breastfeeding after 1 year
No      1
Yes      1.38 (0.50-3.80) 0.532
Who does the teeth brushing
The child alone        1
The caregivers        1.00 (0.25-4.02) 0.998
1. PR prevalence ratio, CI confidence interval.
2. Only variables whose p value were < 0.10 were shown in the table and others described below were omitted. Results for each variable were shown only for the block at which the variable was entered first. Blocks 2, 3, 7 and 8 were not presented because no significant variables were kept at these blocks.
3. Block 1: adjusted for age.
4. Block 2: adjusted for variable kept in block 1(age) plus variables from block 2.
5. Block 3: adjusted for variable kept in block 1(age) plus variables from block 3.
6. Block 4: adjusted for variable kept in block 1(age) plus variables from block 4.
7. Block 5: adjusted for variable kept in block 1(age), variable selected from block 4 (child has visited the dentist) plus variables from block 5.
8. Block 6: adjusted for variable kept in block 1(age), variable selected from block 4 (child has visited the dentist), variables selected from block 5 (frequency of sucrose consumption between main meals, nighttime breastfeeding after 1 year, and use of a night bottle) plus variables from block 6.
9. Block 7: adjusted for variable kept in block 1(age), variable selected from block 4 (child has visited the dentist), variables selected from block 5 (frequency of sucrose consumption between main meals, nighttime breastfeeding after 1 year and use of a night bottle), variable selected from block 6 (who does the teeth brushing) plus variables from block 7.
10. Block 8: adjusted for variable kept in block 1(age), variable selected from block 4 (child has visited the dentist), variables selected from block 5 (frequency of sucrose consumption between main meals, nighttime breastfeeding after 1 year and use of a night bottle), variable selected from block 6 (who does the teeth brushing) plus variables from block 8.