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Intercomparison of plaque score for the Q-scan group between all three visits
| Test group | Plaque index at 1st visit | Plaque index at 2nd visit | Plaque index at 3rd visit | |||
|---|---|---|---|---|---|---|
| Frequency | Percent | Frequency | Percent | Frequency | Percent | |
| Good | 266 | 66.5 | 366 | 91.5 | 386 | 96.5 |
| Fair | 124 | 31.0 | 34 | 8.5 | 14 | 3.5 |
| Poor | 10 | 2.5 | 0 | 0.0 | 0 | 0.0 |
| χ2 value = 9.852, p value = 0.001* | ||||||
Chi-square test
Significant difference
