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Validation of the Polish version of the Dizziness Handicap Inventory

100%
Szostek-Rogula S., Zamysłowska-Szmytke E.
Medycyna Pracy
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2019
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vol. 70
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issue 5
529-534
EN
Background The Dizziness Handicap Inventory (DHI) was established to assess the impact of dizziness and balance problems on the quality of life. The aim of the study was to validate the Polish version of DHI for patients with vestibular disorders. Material and Methods Two hundred and thirty patients diagnosed with vestibular impairment and/or positional vertigo were included in the study. The mean age of the study group was 56.2 years (SD = 13.6). The factor structure (the principal component analysis − PCA), internal consistency (Cronbach’s α), and discrimination ability (the receiver operating characteristic [ROC] curve) were examined. Results A satisfactory internal consistency was found (Cronbach’s α coefficient = 0.92), while no floor or ceiling effect was revealed. The Dizziness Handicap Inventory demonstrated a good ability to discriminate between patients with and without the handicap (sensitivity and specificity about 80%, the cutoff point = 56). In PCA a 3-factor solution was obtained, with the factors related to restrictions in daily life, positional symptoms and visual-vestibular symptoms, which was not in agreement with the subscales provided in the original version. Conclusions The Polish version of DHI demonstrates satisfactory measurement properties and can be used to assess the impact of dizziness on handicap and the quality of life. The functional, emotional, and physical subscales were not confirmed. In particular, the functional subscale revealed no satisfactory internal consistency which provides an indication for further studies. Med Pr. 2019;70(5):529–34
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Cervico-ocular reflex upregulation in dizzy patients with asymmetric neck pathology

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Zamysłowska-Szmytke E., Adamczewski T., Ziąber J., Majak J., Kujawa J., Śliwińska-Kowalska M.
International Journal of Occupational Medicine and Environmental Health
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2019
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vol. 32
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issue 5
723-733
EN
Objectives The aim of this study was to investigate whether the restriction in neck rotation and increased neck muscle tension could be causally related to vertigo and dizziness. Material and Methods Seventy-one patients reporting vertigo and/or imbalance were divided into 2 groups: 45 subjects with unilateral restriction (R+) and 26 without restriction (R–) of cervical rotation and muscle tension in the clinical flexion-rotation test. The normal caloric test was the inclusion criterion. The control group comprised 36 healthy volunteers with no history of vertigo. The vestibulo-ocular reflex (VOR) and the cervico-occular reflex (COR) were measured through the videonystagmography (VNG) sinusoidal pendular kinetic test in the conditions of not inactivated head and immobilized head, respectively. The VNG-head torsion test (VNG-HTT) nystagmus was recorded. Results Among the reported complaints, neck stiffness, headaches and blurred vision were more frequent in the R+ group than in both the R– group and the control group. VNG revealed an increased COR gain and the presence of VNG-HTT nystagmus in the R+ group only. Similarly, only in the R+ group a positive relationship between COR and VOR was observed. Conclusions Patients with asymmetric restriction in neck rotation and increased neck muscle tension reveal the tendency to have an increased response of the vestibular system, along with co-existing COR upregulation. Further research is needed to investigate the relationships between the activation of cervical mechanoreceptors and dizziness pathomechanisms. Int J Occup Med Environ Health. 2019;32(5):723–33
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Zastosowanie posturografii dla oceny układu równowagi dla potrzeb medycyny pracy

67%
Zamysłowska-Szmytke E., Janc M., Ławnicki K., Śliwińska-Kowalska M.
Medycyna Pracy
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2022
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vol. 73
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issue 2
143-150
EN
The posturography test allows assessment of the entire function of balance system and quantitative, device-based verification of the clinical Romberg test. Therefore, the aim of this study is assessment of usefulness of posturography as primary test for balance disorders in occupational medicine.Material and MethodsThe study is cross-sectional, analyzing anonymous results of 1030 patients reporting dizziness and balance disorders. Based on symptoms, clinical examination and videonystagmography patients were classified into subgroups: benign paroxysmal positional vertigo (BPPV [N = 130]), non compensated (NS [N = 82]) and compensated (S [N = 174]) peripheral vestibular, bilateral vestibular (BV [N = 63]), Ménière’s disease (MD [N = 53]), central dizziness (central [N = 293]), migraine (migr. [N = 132]), psychogenic dizziness (psychog. [N = 232]), Persistent postural-perceptual dizziness (PPPD [N = 150]). Besides, 129 healthy people were included in the study.ResultsNinety nine percent of abnormal static posturography (SP) and 94% of abnormal dynamic posturography (PD) results were found in diseased patients. Normal results were found both in healthy group (59% PS, 67% PD) and in diseased group (24% PS, 31% PD). Static posturography’s abnormal results were more frequent in NS, BV and PPPD patients. In PD the differences were visible in the central, psychog. and PPPD subgroups. In NS subgroup the high negative predictive values of static and dynamic tests (82–87%) were calculated in relation to caloric test.ConclusionsStatic tests are the basic test used in examinations of employees for occupational medicine purposes. Posturography is a quantitative record of sways in relation to normative values. Abnormal posturography results most likely indicate the presence of pathologies of the balance system, including psychofunctional disorders. Normal posturography results do not indicate the lack of pathology of balance system what should be included in the work ability assessment. Med Pr. 2022;73(2):143–50
PL
Badanie posturografii umożliwia ocenę czynności układu równowagi jako całości i ilościową, aparaturową weryfikację klinicznej próby Romberga. Dlatego celem pracy była ocena przydatności posturografii jako głównego testu oceny zaburzeń równowagi dla potrzeb medycyny pracy.Materiał i metodyPraca ma charakter przekrojowy. Analizie poddano anonimizowane wyniki 1030 pacjentów zgłaszających się z powodu zawrotów głowy i zaburzeń równowagi. Na podstawie wywiadu, badania przedmiotowego i wyników wideonystagmografii pacjentów zakwalifikowano do podgrup osób z łagodnymi położeniowymi zawrotami głowy [ŁPZG (N = 130)], nieskompensowanymi [NS (N = 82)] i skompensowanymi [S (N = 174)] uszkodzeniami obwodowej części układu przedsionkowego, obustronnym osłabieniem pobudliwości przedsionkowej [bilateral vestibular – BV (N = 63)], chorobą Ménière’a (N = 53), zaburzeniami części ośrodkowej [ośr. (N = 293)], migrenami (N = 132), zaburzeniami psychopochodnymi [psych. (N = 232)] i persistent postural-perceptual dizziness [PPPD (N = 150)]. Do badań włączono również 129 osób zdrowych.WynikiSpośród wszystkich nieprawidłowych wyników posturografii statycznej (PS) i dynamicznej (PD), odpowiednio, 99% i 94% stwierdzono w grupie osób chorych. Prawidłowe wyniki stwierdzono zarówno u 59% (PS) i 67% (PD) osób zdrowych, jak i u 24% (PS) oraz 31% (PD) osób chorych. Wykazano częstsze występowanie nieprawidłowych wyników PS w podgrupach NS, BV i PPPD oraz PD w podgrupach ośr., psych. i PPPD. W podgrupie NS dla obu posturografii wykazano wysoką ujemną wartość predykcyjną (82–87%) w stosunku do próby kalorycznej.WnioskiTesty statyczne są podstawowym badaniem wymaganym w badaniach profilaktycznych pracowników. Posturografia stanowi ilościowy zapis wychwiań w odniesieniu do wartości normatywnych. Nieprawidłowe wyniki posturografii, szczególnie statycznej, z bardzo dużym prawdopodobieństwem wskazują na występowanie patologii układu równowagi, w tym zaburzeń psychofunkcjonalnych. Prawidłowe wyniki badań posturografii nie świadczą o braku patologii układu równowagi, co powinno być uwzględnione w ocenie zdolności do pracy. Med. Pr. 2022;73(2):143–150
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