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Table 6 Internal consistency reliability of the Kiswahili version of the Oral Impacts on daily Performances (OIDP) inventory among urban and rural participants: Corrected item total Spearman's correlation and Cronbach's alpha if item deleted

From: Psychometric properties and the prevalence, intensity and causes of oral impacts on daily performance (OIDP) in a population of older Tanzanians

OIDP item Urban (n = 508) Rural (n = 512)
  Corrected item total correlation Alpha if item deleted Corrected item total correlation Alpha if item deleted
1. Eating .46 .81 .62 .91
2. Speaking .54 .77 .70 .89
3. Cleaning .42 .78 .63 .91
4. Sleeping .64 .75 .77 .89
5. Showing teeth .56 .76 .63 .90
6. Emotion .64 .75 .82 .89
7. Work .51 .77 .78 .89
8. Social contact .59 .77 .79 .89
Standardised Cronbach's Alpha   0.83   0.90