Table 1.
Consent rates for the schools and characteristics of students from the three study areas in 2008, 2010 and 2012
| Fluoridation status | Number of consents | Number of children examined | Response rate (%) | Mean age (years) | Proportion male (mean %) |
|---|---|---|---|---|---|
| 2008 | |||||
| Fluoridated | 1065 | 825 | 77.5 | 6.1 | 50.8 |
| Newly fluoridated | 932 | 781 | 80.1 | 6.0 | 48.7 |
| Unfluoridated | 945 | 523 | 55.3 | 6.3 | 50.3 |
| 2010 | |||||
| Fluoridated | 1054 | 833 | 79.0 | 5.9 | 53.2 |
| Newly fluoridated | 1047 | 857 | 81.9 | 5.5 | 49.3 |
| Unfluoridated | 927 | 594 | 64.0 | 5.6 | 52.7 |
| 2012 | |||||
| Fluoridated | 1102 | 811 | 73.6 | 5.7 | 50.2 |
| Newly fluoridated | 1040 | 844 | 81.1 | 5.5 | 51.7 |
| Unfluoridated | 932 | 612 | 65.7 | 5.6 | 51.1 |