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Association between fluorosis and IQ (Overall)
| IQ Grade | No. | IQ Scores | |||
|---|---|---|---|---|---|
| Mean | SD | Min | Max | ||
| Normal | 241 | 110.1 | 9.0 | 79.7 | 124.1 |
| Very Mild | 96 | 92.6 | 7.9 | 70.8 | 110.8 |
| Mild | 44 | 85.9 | 9.2 | 68.6 | 108.6 |
| Moderate | 43 | 79.0 | 7.9 | 66.4 | 99.7 |
| Severe | 5 | 62.4 | 2.4 | 59.7 | 66.4 |
| Total | 429 | 100.0 | 15.0 | 59.7 | 124.1 |
