Table 2 Reliability coefficient (Cronbach's alpha) of the Likert scales measuring several quality of life issues (see Additional file 1 for the corresponding questions)
| Â | Â | No. of items | Corresponding questions | Alpha |
|---|---|---|---|---|
Functional | Swallowing | 6 | b. 8,9,10,11,12,13 | 0.763 |
Psychosocial | Social contacts | 3 | c. 1,2,3 | 0.636 |