Table 2. Mean values (±SD) of L*, a* and b* coordinates at baseline and after 8 weeks of cigarette-smoking-toothbrushing-cycle (CSTC).
| C | CW | OW | |||
|---|---|---|---|---|---|
| Baseline | 8 weeks | Baseline | 8 weeks | Baseline | 8 weeks |
| L* | |||||
| 85.73a (1.87) | 70.91b (7.11) | 84.75a (1.44) | 72.85b (4.31) | 84.62a (1.24) | 77.09b (4.15) |
| a* | |||||
| 0.99a (0.21) | 6.68b (1.39) | 0.58a (0.13) | 6.73b (1.50) | 0.69a (0.18) | 5.22b (1.10) |
| b* | |||||
| 11.98a (1.34) | 20.68b (4.55) | 12.82a (2.02) | 20.04b (3.87) | 13.84a (2.05) | 17.68a (2.95) |
In rows, for each toothpaste, means followed by the same lowercase letter are similar (Paired-t test, p>0.05)