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

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