Table 2.
Pearson correlation coefficients with 95% confidence interval (95% CI) between perceived chewing ability and oral health-related quality of life for groups of participants stratified by gender, age, years of schooling, number of teeth and presence of denture as indicated.
| Variable | n | Correlation coefficient | 95% CI | |
|---|---|---|---|---|
| Gender | Male | 141 | -0.60 | -0.70 to -0.48 |
| Female | 348 | -0.40 | -0.49 to -0.31 | |
| Age1 | <65 years | 252 | -0.45 | -0.55 to -0.35 |
| ≥65 years | 237 | -0.47 | -0.56 to -0.36 | |
| Years of schooling | High school education | 256* | -0.40 | -0.49 to -0.29 |
| >High school education | 222* | -0.53 | -0.62 to -0.43 | |
| Number of teeth1 | <21 | 247 | -0.47 | -0.56 to -0.36 |
| ≥21 | 242 | -0.43 | -0.53 to -0.32 | |
| Treatment demands | Fix/no denture or RPD maintenance group | 290 | -0.41 | -0.50 to -0.30 |
| Needs replacement of new denture | 199 | -0.51 | -0.61 to -0.40 | |
| Presence of denture(s) and Kennedy classification in RPDs | Fix/no denture | 140 | -0.38 | -0.51 to -0.23 |
| Class I RPD in either/both jaws | 127 | -0.51 | -0.62 to -0.36 | |
| Class IV RPD in either/both jaws | 12 | -0.68 | -0.90 to -0.17 | |
| Other RPD in either/both jaws | 126 | -0.43 | -0.56 to -0.27 | |
| CD/OD in either/both jaws | 84 | -0.52 | -0.66 to -0.35 | |
1Age and number of teeth were split at the variable median
*Some participants refused to answer