Table 2.
Effect of the colonization of S. mutans together with S. sobrinus on 3- and 5-year-old Thai children
| N | Sm+/Sb+ | Sm+/Sb– | Sm–/Sb+ | Sm–/Sb– | P value | |
|---|---|---|---|---|---|---|
| Caries | ||||||
| Yes | 230 | 125 (54.3) | 95 (41.3) | 7 (3.0) | 3 (1.3) | <0.001 |
| No | 113 | 29 (25.7) | 41 (36.3) | 13 (11.5) | 30 (26.5) | |
| Mean±SD | ||||||
| dmft | 230 | 6.7±4.5 | 5.5±4.0 | 4.3±4.2 | 2.0±1.7 | 0.046 |
| dmfs | 230 | 15.2±15.8 | 11.3±12.3 | 7.8±11.6 | 2.7±2.1 | |
| Age | ||||||
| 3 years | 180 | 68 (37.8) | 70 (38.9) | 16 (8.9) | 26 (14.4) | <0.001 |
| 5 years | 163 | 86 (52.8) | 66 (40.5) | 4 (2.5) | 7 (4.3) | |
| Gender | ||||||
| Male | 188 | 89 (47.3) | 72 (38.3) | 9 (4.8) | 18 (9.6) | N.S. |
| Female | 155 | 65 (41.9) | 64 (41.3) | 11 (7.1) | 15 (9.7) | |
| Delivery mode | ||||||
| Vaginal | 181 | 87 (48.1) | 72 (39.8) | 10 (5.5) | 12 (6.6) | N.S. |
| C-section | 162 | 67 (41.4) | 64 (39.5) | 10 (6.2) | 21 (13.0) | |
| Birth weight | ||||||
| <2,500 g | 13 | 3 (23.1) | 5 (38.5) | 1 (7.7) | 4 (30.8) | 0.050 |
| ≥2,500 g | 330 | 151 (45.8) | 131 (39.7) | 19 (5.8) | 29 (8.8) | |
| Mother's premastication | ||||||
| 3-year-old | ||||||
| Yes | 57 | 29 (50.9) | 17 (29.8) | 6 (10.5) | 5 (8.8) | 0.042 |
| No | 123 | 39 (31.7) | 53 (43.1) | 10 (8.1) | 21 (17.1) | |
| Sleep with bottle | ||||||
| Yes | 158 | 84 (53.2) | 57 (36.1) | 8 (5.1) | 9 (5.7) | 0.017 |
| No | 180 | 69 (38.3) | 75 (41.7) | 12 (6.7) | 24 (13.3) | |
| Soft drink | ||||||
| ≥1 per day | 183 | 88 (48.1) | 74 (40.4) | 9 (4.9) | 12 (6.6) | <0.001 |
| Never | 80 | 26 (32.5) | 28 (35.0) | 10 (12.5) | 16 (20.0) | |
| Sometimes | 80 | 40 (50.0) | 34 (42.5) | 1 (1.3) | 5 (6.3) | |
| Gum | ||||||
| ≥1 per day | 139 | 70 (50.4) | 57 (41.0) | 5 (3.6) | 7 (5.0) | 0.030 |
| Never/rare | 202 | 83 (41.1) | 78 (38.6) | 15 (7.4) | 26 (12.9) | |
| Lollipop candy | ||||||
| ≥1 per day | 152 | 71 (46.7) | 67 (44.1) | 7 (4.6) | 7 (4.6) | 0.023 |
| Never/rare | 190 | 83 (43.7) | 68 (35.8) | 13 (6.8) | 26 (13.7) | |