TY - JOUR
T1 - The 25-item Dizziness Handicap Inventory was shortened for use in general practice by 60 percent
AU - van Vugt, Vincent A.
AU - de Vet, Henrica C.W.
AU - van der Wouden, Johannes C.
AU - van Weert, Henk C.P.M.
AU - van der Horst, Henriëtte E.
AU - Maarsingh, Otto R.
PY - 2020/10/1
Y1 - 2020/10/1
N2 - Objectives: The 25-item Dizziness Handicap Inventory (DHI) is the most used questionnaire to assess vestibular symptoms. However, the abbreviated 10-item DHI-S is more suitable for daily practice. The objective of this study was to assess validity, reliability, responsiveness, optimal cutoff point for substantial impairment, and minimally important change (MIC) of the DHI-S in general practice. Study Design and Setting: We performed a psychometric questionnaire evaluation in general practice. In a prospective cohort study, 415 adults with vestibular symptoms filled out the DHI at baseline, and 1-week, 6-month, and 10-year follow-up. DHI answers were used to calculate DHI-S scores. We assessed validity by criterion validity (Pearson's r) at each measurement. We used longitudinal measurements for test–retest reliability (intraclass correlation coefficient (ICC)) and responsiveness (r). We determined optimal DHI-S cutoff points for substantial impairment (≥30 DHI) and MIC (>11 DHI) with receiver operating characteristic (ROC) curve analyses. Results: DHI-S demonstrated excellent criterion validity (r = 0.93–0.96), test–retest reliability (ICC = 0.86), and responsiveness (r = 0.89). DHI-S reliably distinguished substantial impairment and identified MIC, with optimal DHI-S cutoff scores of ≥12 points and >5 points, respectively. Conclusion: The DHI-S is a valid, reliable, and responsive questionnaire that could replace the DHI in general practice.
AB - Objectives: The 25-item Dizziness Handicap Inventory (DHI) is the most used questionnaire to assess vestibular symptoms. However, the abbreviated 10-item DHI-S is more suitable for daily practice. The objective of this study was to assess validity, reliability, responsiveness, optimal cutoff point for substantial impairment, and minimally important change (MIC) of the DHI-S in general practice. Study Design and Setting: We performed a psychometric questionnaire evaluation in general practice. In a prospective cohort study, 415 adults with vestibular symptoms filled out the DHI at baseline, and 1-week, 6-month, and 10-year follow-up. DHI answers were used to calculate DHI-S scores. We assessed validity by criterion validity (Pearson's r) at each measurement. We used longitudinal measurements for test–retest reliability (intraclass correlation coefficient (ICC)) and responsiveness (r). We determined optimal DHI-S cutoff points for substantial impairment (≥30 DHI) and MIC (>11 DHI) with receiver operating characteristic (ROC) curve analyses. Results: DHI-S demonstrated excellent criterion validity (r = 0.93–0.96), test–retest reliability (ICC = 0.86), and responsiveness (r = 0.89). DHI-S reliably distinguished substantial impairment and identified MIC, with optimal DHI-S cutoff scores of ≥12 points and >5 points, respectively. Conclusion: The DHI-S is a valid, reliable, and responsive questionnaire that could replace the DHI in general practice.
KW - Dizziness
KW - Dizziness Handicap Inventory
KW - General practice
KW - Primary care
KW - Vertigo
UR - http://www.scopus.com/inward/record.url?scp=85087745074&partnerID=8YFLogxK
U2 - https://doi.org/10.1016/j.jclinepi.2020.06.021
DO - https://doi.org/10.1016/j.jclinepi.2020.06.021
M3 - Article
C2 - 32565217
SN - 0895-4356
VL - 126
SP - 56
EP - 64
JO - Journal of Clinical Epidemiology
JF - Journal of Clinical Epidemiology
ER -