Table 3.
Substrate Accumulation Scores | Mean (SD) | ||
---|---|---|---|
Plaque | Calculus | Stain | |
6 months | |||
Control group | 8.1 (1.8) | 3.7 (1.2) | 3.8 (1.5) |
Test group | 5.6 (1.8) | 2.6 (1.2) | 2.4 (1.1) |
Difference,a % | 30.9 | 30.9 | 36.6 |
P valueb | 0.0026 | 0.0271 | 0.0202 |
12 months | |||
Control group | 7.0 (2.2) | 4.5 (1.5) | 4.8 (2.0) |
Test group | 4.9 (2.2) | 3.3 (1.1) | 3.2 (1.0) |
Difference,a % | 30.4 | 25.4 | 33.1 |
P valueb | 0.0259 | 0.0455 | 0.0268 |
Abbreviation: SD, standard deviation.
a Difference between control and test groups.
b P < .05 denotes significantly different from the control group.