Table 6 Internal consistency reliability: Cronbach's alpha, Alpha if item deleted and Corrected item-total correlation (TMD groups)
TMD groups | Number of items | Cronbach's alpha | Range of α's if items deleted | Range of corrected item total correlations | |
|---|---|---|---|---|---|
CPQ8-10 | Total scale | 25 | 0.93 | (0.93-0.93) | (0.39-0.76) |
n = 141 | Subscales | ||||
Oral symptoms | 5 | 0.68 | (0.61-0.66) | (0.37-0.48) | |
Functional limitations | 5 | 0.78 | (0.70-0.75) | (0.51-0.67) | |
Emotional well-being | 5 | 0.85 | (0.81-0.83) | (0.60-0.71) | |
Social well-being | 10 | 0.90 | (0.88-0.90) | (0.52-0.77) | |
CPQ11-14 | Total scale | 37 | 0.94 | (0.93-0.94) | (0.28-0.73) |
n = 176 | Subscales | ||||
Oral symptoms | 6 | 0.69 | (0.62-0.68) | (0.33-0.51) | |
Functional limitations | 9 | 0.79 | (0.76-0.78) | (0.40-0.57) | |
Emotional well-being | 9 | 0.90 | (0.88-0.89) | (0.59-0.76) | |
Social well-being | 13 | 0.87 | (0.85-0.87) | (0.28-0.67) |