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Individual participant mean tooth calculus scores with and without water additive treatment.
| Mean tooth calculus scores | ||
|---|---|---|
|
| ||
| Participant number | No water additive | Water additive |
| 1 | 5.94 | 4.39 |
| 2 | 4.22 | 3.72 |
| 3 | 5.44 | 5.22 |
| 4 | 3.94 | 4.22 |
| 5 | 5.78 | 4.39 |
| 6 | 4.83 | 4.72 |
| 7 | 3.78 | 2.22 |
| 8 | ND | ND |
ND — no data.
