Table 2:
Preventive effect expressed using percentage reduction in caries increment and the number of children needed to be treated to prevent one tooth from developing caries
| Group A32 | Group B6 | Group Bx | Group B0 | |
|---|---|---|---|---|
| Mean Ic (%) | 0.48 (28%) | 0.80 (51%) | 1.31 (68%) | 2.14 (118%) |
| PF in reference to group B0 | 77.47% | 62.84% | 38.93% | ----- |
| PF in reference to group Bx | 63.11% | 39.15% | ----- | ----- |
| PF in reference to group B6 | 39.37% | ----- | ----- | ----- |
| Mean annual Ic | 0.24 | 0.40 | 0.66 | 1.07 |
| NNT in reference to group B0 | 1.2 | 1.5 | 2.4 | ----- |
| NNT in reference to group A6 | 6.3 | ----- | ----- | ----- |
Ic: caries increment; PF: preventive fraction; NNT: number of children needed to treat