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Distribution of students supragingival plaque score by district, age, and sex (N = 785) (percentages in parenthesis).
| Plaque free | With Plaque | Total | |||||
| n | % | n | % | n | % | ||
|
| |||||||
| District | Tanga | 119 | (58.3) | 275 | (47.3) | 394 | (50.2) |
| Lushoto | 85 | (41.7) | 306 | (52.7)** | 391 | (49.8) | |
| Age group | 14–17 | 148 | (72.8) | 400 | (68.8) | 548 | (69.8) |
| (years) | 18+ | 56 | (27.2) | 181 | (31.2) | 237 | (30.2) |
| Sex | M | 85 | (41.7) | 305 | (52.5)** | 390 | (49.7) |
| F | 119 | (58.3) | 276 | (47.5) | 395 | (50.3) | |
|
| |||||||
| Total | 204 | (26.0) | 581 | (74.0) | 785 | (100.0) | |
Chi-square test: **P < 0.01.
