Table 2 Alternative correlation coefficients (Pearson r, Spearman ρ, intraclass ICC) for the self-reported and clinically assessed number of teeth among women
n | % | r | ρ | ICC | |
|---|---|---|---|---|---|
Education (n = 916) | |||||
Basic | 34 | 4 | 0.83 | 0.88 | 0.80 |
Secondary | 260 | 28 | 0.76 | 0.82 | 0.75 |
Higher | 622 | 68 | 0.76 | 0.82 | 0.75 |
Tooth brushing frequency (n = 929) | |||||
Once daily or less | 187 | 20 | 0.80 | 0.81 | 0.77 |
At least twice daily | 742 | 80 | 0.75 | 0.83 | 0.74 |
Smoking status (n = 859) | |||||
Never | 481 | 56 | 0.75 | 0.83 | 0.74 |
Former | 191 | 22 | 0.86 | 0.85 | 0.85 |
Current | 187 | 22 | 0.73 | 0.82 | 0.72 |
Total | 929 | 100 | 0.77 | 0.82 | 0.76 |