Table 2 Reliability statistics for total scale and subscales: Short Forms of the CPQ11–14 ISF:8 and ISF:16
Variable | Number of items | Cronbach's alpha (n = 136) | Intraclass correlation coefficient (95% CI)* (n = 86) |
|---|---|---|---|
Total scale | |||
ISF:8 | 8 | 0.70 | 0.98 (0.97–0.99) |
ISF:16 | 16 | 0.84 | 0.97 (0.94–0.97) |
Subscale | |||
Oral Symptoms | |||
ISF:8 | 2 | 0.40 | 0.98 (0.96–0.98) |
ISF:16 | 4 | 0.63 | 0.93 (0.89–0.95) |
Functional limitations | |||
ISF:8 | 2 | 0.41 | 0.96 (0.95–0.98) |
ISF:16 | 4 | 0.50 | 0.94 (0.91–0.96) |
Emotional well-being | |||
ISF:8 | 2 | 0.71 | 0.99 (0.98–0.99) |
ISF:16 | 4 | 0.70 | 0.96 (0.93–0.97) |
Social well-being | |||
ISF:8 | 2 | 0.32 | 0.99 (0.93–0.99) |
ISF:16 | 4 | 0.68 | 0.95 (0.92–0.96) |