Table 2 Internal consistency measured for the total OHIP-NL and for its seven domains: Cronbach's alphas and average inter-item correlations
| Â | Cronbach's alpha | Average inter-item correlation |
|---|---|---|
Total OHIP-NL | 0.97 | 0.42 |
Functional limitation | 0.82 | 0.34 |
Physical discomfort | 0.87 | 0.42 |
Psychological discomfort | 0.90 | 0.64 |
Physical disability | 0.88 | 0.54 |
Psychological disability | 0.92 | 0.66 |
Social disability | 0.95 | 0.79 |
Handicap | 0.92 | 0.65 |