| Table 2: Results of studies of dental fluorosis prevalence in areas with nonfluoridated water | ||||||
|---|---|---|---|---|---|---|
| Type of case; prevalence, % | ||||||
| Study and year of examination | Age, yr | Fluoride intake period | None | Very mild/mild | Moderate/severe* | Total* |
| Segreto et al, 1980[23] | 7-18 | 1962-79 | 74.6 | 25.4 | 0.0 | 25.4 |
| Driscoll et al, 1980[20] | 8-16 | 1964-78 | 94.1 | 5.9 | 0.0 | 5.9 |
| Leverett, 1981[22] | 7-17 | 1964-80 | 95.6 | --+ | --+ | 4.4 |
| Szpunar and Burt, 1986[24] | 6-12 | 1974-86 | 87.8 | 12.2 | 0.0 | 12.2 |
| Woolfolk et al, 1987[28] | 9-13 | 1974-84 | 77.7 | 22.4 | 0.0 | 22.4 |
| Ismail et al, 1987[29] | 11-17++ 11-17~ | 1970-82 1970-82 | 68.9 69.9 | --+ --+ | --+ --+ | 31.1 30.1 |
| Hargreaves et al, 1987[30] | 6-13 | 1974-87 | 85.0 | --+ | --+ | 15.0 |
| Pendrys et al, 1988[31] | 11-14 | 1974-83 | 74.8 | --+ | --+ | 25.2 |
| Ismail et al, 1991[26] | 10-12 | 1979-87 | 58.5 | --+ | --+ | 41.5 |
| Clark et al, 1991[27] | 6-14 | 1977-91 | 45.0 | 48.0 | 7.0 | 55.0 |
|
*Presented to enable comparison with future data and with Table 1. Adapted from Clark.[1]
+Cases were not classified according to severity. ++Students in public schools. ~Students in private schools. | ||||||