Validation of a Greek version of the oral health impact profile (OHIP-14) for use among adults

Table 3 Reliability analysis based on the corrected item-total correlation and Cronbach's alpha coefficient if item deleted according to the sampling region and the sampling cluster units of the study.

Impact Item	Athens		Thessaloniki		University Dental Clinic		Social Insurance Dental Clinic
	Corrected Item - Total Correlation	Cronbach's Alpha if Item Deleted	Corrected Item - Total Correlation	Cronbach's Alpha if Item Deleted	Corrected Item - Total Correlation	Cronbach's Alpha if Item Deleted	Corrected Item - Total Correlation	Cronbach's Alpha if Item Deleted
1. Difficult to pronounce words	0.64	0.88	0.66	0.85	0.66	0.91	0.64	0.88
2. Worsened taste	0.50	0.88	0.36	0.87	0.54	0.92	0.51	0.88
3. Pain	0.73	0.88	0.68	0.85	0.77	0.91	0.66	0.88
4. Uncomfortable to eat	0.43	0.88	0.34	0.87	0.63	0.92	0.41	0.89
5. Self-conscious	0.48	0.88	0.60	0.85	0.65	0.92	0.54	0.88
6. Feel tensed	0.61	0.88	0.70	0.85	0.74	0.91	0.60	0.88
7. Diet unsatisfactory	0.72	0.88	0.72	0.85	0.81	0.91	0.73	0.87
8. Interrupted meals	0.55	0.88	0.51	0.86	0.58	0.92	0.52	0.88
9. Difficult to relax	0.69	0.88	0.43	0.86	0.69	0.91	0.60	0.88
10. Embarrassed	0.67	0.88	0.42	0.86	0.69	0.91	0.62	0.88
11. Irritable	0.57	0.88	0.46	0.86	0.58	0.92	0.56	0.88
12. Difficult to do jobs	0.61	0.88	0.32	0.87	0.46	0.92	0.65	0.88
13. Life less satisfying	0.16	0.89	0.51	0.86	0.54	0.92	0.39	0.89
14. Totally unable to function	0.62	0.88	0.57	0.86	0.73	0.91	0.58	0.88

ISSN: 1477-7525