Am J Med 1989 86: 262–266.Ĭolledge NR, Wilson JA, Macintyre CCA, MacLennan WJ. Common symptoms in ambulatory care: incedence, evaluation, therapy, and outcome. The prevalence of symptoms in medical outpatients and the adequacy of therapy. Does this dizzy patient have a serious form of vertigo? J Am Med Assoc 1994 271: 385–388. Which primary care patients with dizziness will develop persistent impairment? Arch Family Med 1993 2: 847–852.įroehling DA, Silverstein MD, Mohr DN, Beatty CW. The VDI questionnaire could be a useful complement of the clinical evaluation of these patients at both group and individual level.īailey KE, Sloane PD, Mitchel M, Preisser J. The data presented suggest that the VDI questionnaire is a reliable, valid and responsive instrument for patients with vertigo, dizziness or imbalance. In the second administration, VDI scores showed a deterioration among those reporting a worsening in their symptoms and an improvement among those reporting feeling better. All factor loadings were significantly different from zero and confirmed the expected relations. VDI scores were more correlated with Balance Scale scores than with mental health indicators. Reliability of the VDI was high (0.92 for VDI HRQoL scale and 0.86 for VDI symptoms). Correlation and confirmatory factor analysis were used. The VDI symptoms and the VDI health related quality of life (HRQoL) scales were administered during the visit and some weeks after. Patients were clinically evaluated and administered several specific and generic health status instruments: the Balance Scale, the SF-12 Health Survey and the General Health Questionnaire 12 items. Psychometric properties were tested in 130 patients recruited in primary care general practices, neurologists and ENT out-patient clinics. Items were reduced by qualitative and quantitative methods. Items of the VDI questionnaire were generated through an international panel of clinicians, in-depth interviews with 25 patients and an extensive literature search. We present the development of a new multipurpose measure specific to patients with these symptoms: the VDI questionnaire. Vertigo, dizziness and imbalance are frequent symptoms among patients in clinical practice.
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