Table 2.
Overall demographics and clinical features.
| Total, n | 635 |
| Female sex, n (%) | 427 |
| Age, mean (SD) | 64 (16.3) |
| Symptom duration in months, mean (SD) | 18 (50.9) |
| Symptom duration in months, median | 5 |
| Follow-up time in months, mean (SD) | 9 (12.8) |
| Follow-up time in months, median | 4 |
| Previously treated for BPPV, n (%) | 336 (52.9) |
| Primary etiology, n (%) | 533 (83.9) |
| Secondary etiologies, n (%) | |
| ° Head trauma | 50 (7.9) |
| ° Vestibular neuritis | 25 (3.9) |
| ° Meniere's disease | 12 (1.9) |
| ° Previous ear surgery | 10 (1.6) |
| ° Meningitis | 1 (0.2) |
| ° Other* | 4 (0.6) |
| BPPV characteristics, n (%) | |
| ° Unilateral mono-canal | 326 (51.3) |
| ° Unilateral multi-canal | 93 (14.6) |
| ° Bilateral mono-canal | 95 (15.0) |
| ° Bilateral multi-canal | 121 (19.1) |
| BPPV type, n (%) | |
| ° Posterior CAN | 592 (93.2) |
| ° Posterior CUP | 76 (12.0) |
| ° Lateral CAN | 189 (29.8) |
| ° Lateral CUP | 248 (39.1) |
| ° Anterior CAN | 69 (10.9) |
| ° Anterior CUP | 55 (8.7) |
*
Two cases of sudden deafness with vestibular affection, one case with barotrauma and one case of uncharacteristic inner ear trauma after otoscopy that resulted in a sudden short-lasting loud noise followed by a profound hearing loss and complaints of positional vertigo. CAN, canalolithiasis; CUP, cupulolithiasis.