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Association of dental fluorosis with sources of drinking water.
| Variables | The Severity of Dental Fluorosis | ||||||
|---|---|---|---|---|---|---|---|
| None | Questionable | Very Mild | Mild | Moderate | Severe | Total | |
| Well water | 163 | 141 | 105 | 71 | 12 | 3 | 495 |
| Filtered water | 414 | 197 | 36 | 5 | 3 | 0 | 655 |
| Total | 577 | 338 | 141 | 76 | 15 | 3 | 1150 |
| p < 0.002 | |||||||
