Table 2.
BIVARIATE RELATIONSHIPS BETWEEN BREAST-FEEDING DURATION AND DENTAL CARIES
| Person level (n=509 children) | Breast-feeding duration (mos) |
P-value | ||
|---|---|---|---|---|
| <6 | ≥6 | |||
| A | All primary teeth (5 ys old) | |||
| Caries prevalence % (n) | 25 (89/359) | 19 (29/150) | .21* | |
| Mean dfs† | 1.19 | 0.97 | .15‡ | |
| B | Primary second molars (5 ys old) | |||
| Caries prevalence % (n) | 18 (65/359) | 9 (14/150) | .02* | |
| Mean dfs† | 0.55 | 0.33 | .02‡ | |
| C | Primary second molars increment (5–9 ys old) | |||
| Caries prevalence % (n) | 32 (116/359) | 31 (46/150) | .76* | |
| Mean dfs† increment | 0.96 | 1.00 | .89‡ | |
|
| ||||
| Tooth level | <6 mos (%) (n) | ≥6 mos (%) (n) | P-value | |
|
| ||||
| A | All primary tooth d2–3f§ prevalence (5 ys old) (n=10,180 teeth) | 4 (248/7,180) | 3 (80/3,000) | .34‖ |
| B | Primary second molar d2–3f§ prevalence (5 ys old) (n=2,036 teeth) | 9 (123/1,436) | 5 (29/600) | .08‖ |
| C | Primary second molar d2–3f§ incidence (5–9 ys old) (n=2,036 teeth) | 17 (242/1,436) | 14 (84/600) | .29‖ |
*
Fisher’s exact test.
†
dfs=decayed filled surfaces.
‡
Wilcoxon rank sum test.
§
d2–3f=cavitated enamel/dentin and/or filled.
‖
Generalized logistic regression with exchangeable correlation structure.