Cross-cultural adaptation and psychometric evaluation of the Yoruba version of the Back beliefs questionnaire among patients with chronic low-back pain

Table 2 Internal consistency score if items of the BBQ-Y is deleted (N = 119; distractor items not included) and Item by Item Correlation between the Test-Retest of the Yoruba version of BBQ-Y (N = 51)

Item	Cronbach’s alpha if item deleted	Intra Class Correlation	95% Confidence Interval
Item	Cronbach’s alpha if item deleted	Intra Class Correlation	Lower Bound	Upper Bound
1. There is no real treatment for back trouble	0.72	0.89	0.81	0.94
2. Back trouble will eventually stop you from working	0.69	0.95	0.91	0.97
3. Back troubles mean periods of pain for the rest of one’s life	0.68	0.91	0.84	0.95
4. Doctors cannot do anything for back troubles	a	0.92	0.85	0.95
5. A bad back should be exercised	a	0.94	0.89	0.97
6. Back trouble makes everything in life worse	0.65	0.95	0.92	0.97
7. Surgery is the most effective way to treat back trouble	a	0.91	0.83	0.95
8. Back trouble may mean you end up in a wheelchair	0.68	0.88	0.73	0.94
9. Alternate treatments are the answer for back troubles	a	0.83	0.70	0.90
10. Back trouble means a long period of time off work	0.67	0.97	0.94	0.98
11. Medication is the only way of relieving back trouble	a	0.91	0.87	0.92
12. Once you have back trouble, there is always a weakness	0.68	0.90	0.82	0.94
13. Back trouble must be rested	0.71	0.81	0.66	0.89
14. Later in life, back trouble gets progressively worse	0.68	0.97	0.95	0.98

BBQ-Y Yoruba version of the Back Beliefs Questionnaire; ^a – Distractor items not included during the internal consistency analysis

ISSN: 1477-7525