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TABLE 4: Correlation coefficient between grades of fluorosis and DMFT for different age groups
| Age group | Group I | Group II | Group III | Group IV | Group V | Group VI | ||||||
| r | –0.74440* | –0.6865 | –0.4400 | 0.6214 | –0.4035# | –0.5211 | ||||||
| r = Correlation coefficient | ||||||||||||
| * = Strong negative correlation | ||||||||||||
| # = Weak negative correlation | ||||||||||||
