Table 3 Association Between Caries Development Rate with Independent Variables at 18 Months Follow-up: Univariate analysis (n = 2685 surfaces)
| Â | Caries development rate n (%) | P Value |
|---|---|---|
Gender | Â | 0.496 |
 male | 302 (22.3) |  |
 female | 312 (23.4) |  |
Main caregiver | Â | 0.006 |
 parents | 494 (24.1) |  |
 others | 120 (18.9) |  |
Father education level |  | < 0.001 |
 primary | 115 (18.8) |  |
 secondary | 413 (25.7) |  |
 college | 86 (18.4) |  |
Mother education level | Â | 0.076 |
 primary | 77 (18.7) |  |
 secondary | 405 (23.3) |  |
 college | 132 (24.5) |  |
Monthly family income, Thai baht | Â | 0.630 |
 < 10,000 | 126 (23.6) |  |
 10,000–20,000 | 332 (22.2) |  |
 > 20,000 | 156 (23.9) |  |
Tooth brushing by | Â | 0.003 |
 child | 518 (24.1) |  |
 parents | 96 (18.0) |  |
Frequency of brushing |  | < 0.001 |
 < 2 times | 113 (32.0) |  |
 ≥ 2 times | 501 (21.5) |  |
Brushing with fluoride toothpaste | Â | 0.018 |
 yes | 570 (22.4) |  |
 no | 44 (31.0) |  |
Milk |  | < 0.001 |
 non-sugary | 156 (18.0) |  |
 sugary | 458 (25.2) |  |
On bottle feeding | Â | 0.954 |
 yes | 91 (23.0) |  |
 no | 523 (22.8) |  |
Daily snack consumption | Â | 0.127 |
 ≤ 2 times | 373 (21.9) |  |
 > 2 times | 241 (24.5) |  |
Contact characteristics | Â | 0.056 |
 closed | 449 (23.9) |  |
 open | 165 (20.5) |  |
Food impaction |  | < 0.001 |
 yes | 52 (34.9) |  |
 no | 562 (22.2) |  |
Adjacent surface characteristics |  | < 0.001 |
 sound | 406 (20.3) |  |
 non-cavitated | 181 (31.3) |  |
 cavitated | 27 (26.2) |  |