| |
Quantified Balance Disorders (QBD) group
|
Dizziness Only (DO) group
|
|---|
|
N
|
20
|
20
|
|
Age mean ± SD
|
60.1 ± 9.9 years
|
45.6 ± 14.0 years
|
|
Gender M/F
|
8/12
|
6/14
|
|
Pathological BCIa
|
20/20
|
0/20
|
|
Duration of dizziness mean ± SD
|
3.5 ± 5.0 years
|
5.4 ± 7.7 years
|
|
Dizziness constant (fitting definition of PPPDb) or occurring in episodes.
|
12 constant/8 episodes
|
11 constant/9 episodes
|
|
Fear of falling
|
4/20
|
10/20
|
|
Deficits in VORc tests
|
15d/20
|
0/20
|
|
Unilateral peripheral vestibular deficit due to vestibular neuritis – not or over-compensated, 2 with active BPPNe, 4 with constant dizziness.
|
7/20
| |
|
Unilateral peripheral vestibular deficit due to vestibular neuritis – compensated. 6 with constant dizziness.
|
8/20
| |
- aBCI stands for Balance Control Index, which is a combination of measurement values from stance and gait tests [22, 23]
- bPPPD (persistent postural-perceptual dizziness) is defined according to the criteria of Staab et al. [27] and requires that dizziness be present for 15 of every consecutive 30 days
- cVOR stands for vestibular ocular reflex. To be defined as a peripheral vestibular deficit the caloric paresis value had to be greater than 30%.To be defined as a not centrally compensated deficit, the rotating chair response asymmetry for yaw rotation accelerations of 20°/s2 towards and away from the deficit side had to be greater than 15%. To be defined as a centrally over-compensated, the deficit the rotating chair response asymmetry for rotation accelerations of 20°/s2 had to be less than − 15%. 30 and 15%, respectively, are the upper 95% limits of normal subjects for these tests
- dThe remaining 5 patients without deficits in VOR tests were assumed to have phobic postural vertigo, based on the criteria of Querner et al. [28] and Brandt et al. [29]. 2 had constant dizziness
- eBPPN stands for benign proximal positioning nystagmus
