Table 4.

Results of item-deleted alpha analysis.

Items	Corrected item–total correlation	Cronbach's alpha if item deleted
Difficulty in eating normal food	0.765	0.791
Difficulty in eating food according to consistency	0.719	0.797
Difficulty in speaking	0.660	0.816
Difficulty in brushing	0.546	0.828
Difficulty in swallowing	0.456	0.831
Difficulty in mouth opening	0.562	0.820
Number of sites involved in the oral cavity	0.606	0.814
Total size of the oral erosions	0.498	0.825
Depth of the oral erosions	0.390	0.844