Table 5 Cross-tabulation of the predicted probabilities of having aesthetically significant fluorosis (TF3+) for the fluoride levels in the drinking and cooking water (number of subjects)
Cooking water (ppm) | ||||||
|---|---|---|---|---|---|---|
0 to 0.19 | 0.20 to 0.59 | 0.60 to 0.89 | 0.90 to 1.59 | 1.60 + | ||
Drinking Water (ppm) | 0 to 0.19 | 0.06 (103) | 0.07 (103) | 0.10 (32) | 0.10 (31) | 0.25 (51) |
0.20 to 0.59 | 0.08 (15) | 0.09 (96) | 0.13 (46) | 0.13 (29) | 0.31 (51) | |
0.60 to 0.89 | 0.09 (10) | 0.11 (3) | 0.15 (52) | 0.15 (2) | 0.35 (4) | |
0.9+ | - | 0.20 (1) | 0.28 (2) | 0.27 (57) | 0.53 (18) | |