Quantitative neurologic assessment of ataxia-telangiectasia

Thomas O. Crawford, A. S. Mandir, M. A. Lefton-Greif, S. N. Goodman, B. K. Goodman, H. Sengul, H. M. Lederman

Research output: Contribution to journalArticlepeer-review

77 Scopus citations


Background: Ataxia telangiectasia (A-T) is a rare disorder with many distinctive neurologic features. Although there is substantial individual variation in the rate of progression of these features, their relationship to one another or to age has not been characterized. Methods: We formulated and tested multiple elements that assess different neurologic functions known to be affected by A-T. The overall index was applied to 52 patients with A-T, 2 to 29 years of age. Results: Seven elements items proved to be informative, and three elements were added based on face validity. In a linear regression model of individuals under 19 years of age, controlled for correlation within sibships, age accounted for 87% of the variation in the A-T Index. Conclusion: Despite substantial individual variability of the phenotypic elements of A-T, scores on this multidimensional index have a very high correlation with age, indicating that there is a characteristic rate of progression of the disease, although functional domains in the brain are differentially affected. The pattern of scores suggests that a severe and a mild form of A-T may be distinguished by this quantitative measure. With further development this index may become useful as an outcome measure for treatment studies and prognosis.

Original languageEnglish (US)
Pages (from-to)1505-1509
Number of pages5
Issue number7
StatePublished - Apr 11 2000


  • Ataxia
  • Clinical trial
  • Disability rating scale
  • Evaluation study
  • Factor analysis
  • Natural history
  • Telangiectasia

ASJC Scopus subject areas

  • Clinical Neurology


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