. Author manuscript; available in PMC: 2016 Apr 21.

Published in final edited form as: JAMA Otolaryngol Head Neck Surg. 2013 Aug 1;139(8):803–810. doi: 10.1001/jamaoto.2013.3913

Table 1.

Corollary study to determine construct validity of the bilateral vestibular hypofunction case definition.

Must answer ‘yes’ to all of the following:	BVH (12)	UVH (12)	Control (13)
Dizziness or Balance problems in last 12 months?	12 (100%)	10 (83%)	3 (30%)
Feel off-balance or unsteady	12 (100%)	10 (83%)	2 (20%)
Have difficulty walking in the dark	12 (100%)	7 (58%)	0 (0%)
Have difficulty walking on uneven surfaces	12 (100%)	3 (25%)	0 (0%)
Blurred of fuzzy vision when moving your head	12 (100%)	1 (8%)	0 (0%)
Drifting to the side when trying to walk straight	12 (100%)	1 (8%)	0 (0%)
Problem defined as at least a ‘big problem’	12 (100%)	0 (0%)	0 (0%)
Duration of symptoms of at least 1 year	11 (92%)	0 (0%)	0 (0%)

Results of a corollary validation of 37 subjects who were not enrolled in the 2008 NHIS Balance Supplement. Values are cumulative counts of remaining respondents that meet the case definition for confirmed bilateral vestibular hypofunction (BVH), unilateral vestibular hypofunction (UVH), and for those with no history of dizziness or balance complaints.