TY - JOUR
T1 - The Component Structure of the Dizziness Handicap Inventory (DHI)
T2 - A Reappraisal
AU - Van De Wyngaerde, Kelly M.
AU - Lee, Minji K.
AU - Jacobson, Gary P.
AU - Pasupathy, Kalyan
AU - Romero-Brufau, Santiago
AU - McCaslin, Devin L.
N1 - Publisher Copyright:
© 2019, Otology & Neurotology, Inc.
PY - 2019/10/1
Y1 - 2019/10/1
N2 - Objective: The Dizziness Handicap Inventory (DHI) is a 25-item self-report questionnaire developed to measure the disabling and handicapping impact of dizziness. The present investigation was conducted in an effort to re-assess the factor structure of the DHI. Study Design: Retrospective study. Setting: Tertiary care center. Patients: Subjects were 1,991 patients who were evaluated in the Mayo Clinic-Rochester Vestibular and Balance Laboratory. Main Outcome Measures: Exploratory factor analysis: an exploratory bifactor analysis (EFA) with bifactor rotation was used to analyze a random sample of 999 patients. Analyses were used to determine the dominance of the general factor (i.e., total score) relative to the group factor (i.e., subscales). Confirmatory factor analysis: a confirmatory bifactor graded response model was fit with appropriate item-to-group relationships that was discovered by our exploratory analyses. To validate the bifactor model that was identified with the exploratory analyses, a bifactor model with three grouping factors (i.e., Physical manifestations, Catastrophic impact of dizziness, and the Emotional impact of dizziness) were fit to a different random sample of 992 patients using the new item-to-group factor specifications. Results: In the confirmatory analyses, all items had a positive factor loading on the general factor. There were 14 items that loaded on the general factor only. The rest of the items (n = 11) loaded on both the general factor and one of three group factors. Conclusions: Conclusions of the study revealed several findings: 1) reporting the result as a total score (i.e., a single general factor) is warranted, and, 2) there is statistical support for the existence of three subscales representing: the Physical manifestations, Catastrophic impact, and Emotional impact of dizziness and vertigo.
AB - Objective: The Dizziness Handicap Inventory (DHI) is a 25-item self-report questionnaire developed to measure the disabling and handicapping impact of dizziness. The present investigation was conducted in an effort to re-assess the factor structure of the DHI. Study Design: Retrospective study. Setting: Tertiary care center. Patients: Subjects were 1,991 patients who were evaluated in the Mayo Clinic-Rochester Vestibular and Balance Laboratory. Main Outcome Measures: Exploratory factor analysis: an exploratory bifactor analysis (EFA) with bifactor rotation was used to analyze a random sample of 999 patients. Analyses were used to determine the dominance of the general factor (i.e., total score) relative to the group factor (i.e., subscales). Confirmatory factor analysis: a confirmatory bifactor graded response model was fit with appropriate item-to-group relationships that was discovered by our exploratory analyses. To validate the bifactor model that was identified with the exploratory analyses, a bifactor model with three grouping factors (i.e., Physical manifestations, Catastrophic impact of dizziness, and the Emotional impact of dizziness) were fit to a different random sample of 992 patients using the new item-to-group factor specifications. Results: In the confirmatory analyses, all items had a positive factor loading on the general factor. There were 14 items that loaded on the general factor only. The rest of the items (n = 11) loaded on both the general factor and one of three group factors. Conclusions: Conclusions of the study revealed several findings: 1) reporting the result as a total score (i.e., a single general factor) is warranted, and, 2) there is statistical support for the existence of three subscales representing: the Physical manifestations, Catastrophic impact, and Emotional impact of dizziness and vertigo.
KW - Dizziness
KW - Dizziness Handicap Inventory
KW - Self-report dizziness handicap
UR - http://www.scopus.com/inward/record.url?scp=85071666579&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85071666579&partnerID=8YFLogxK
U2 - 10.1097/MAO.0000000000002365
DO - 10.1097/MAO.0000000000002365
M3 - Article
C2 - 31469793
AN - SCOPUS:85071666579
SN - 1531-7129
VL - 40
SP - 1217
EP - 1223
JO - Otology and Neurotology
JF - Otology and Neurotology
IS - 9
ER -