Table 6. Effects of comorbid conditions on BPPV recurrence.

Comorbidities	RR	OR	P	N
Allergies	0.94	0.77	0.43	76/27∶91/25
Ear/Hearing problems	1.12	1.64	0.15	74/17∶93/35
High cholesterol	1.10	1.54	0.20	75/18∶92/34
Headaches	0.98	0.93	0.87	55/18∶112/34
Migraine	1.08	1.41	0.44	38/9∶129/43
Numbness/Paralysis	1.29	7.34	0.03	21/1∶146/51
Thyroid disease	1.14	1.96	0.22	34/6∶133/46
Physical trauma	1.23	3.95	0.30	12/1∶155/51

The relative risk (RR) and odds ratio (OR) of BPPV recurrence in the presence vs. absence of a comorbid condition were calculated. The actual case numbers (N) are also presented in the order of recurrent/non-recurrent cases with and without the comorbid condition. Fisher’s exact test was used to obtain the two-tailed p values.