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Statistical work
| Cohorts, n | Correlation coefficient | p value | |
|---|---|---|---|
| Prevalence of teeth with manifest caries over time | 80 | 0.425 | <0.001 |
| Prevalence of individuals with manifest caries over time | 50 | 0.336 | 0.017 |
The correlation between time and caries prevalence for teeth and individuals, using Spearman's rank correlation test (two-tailed).
