A statistical trial of subclassification for tardive dyskinesia

T. Inada, G. Yagi, K. Kamijima, K. Ohnishi, M. Kamisada, M. Takamiya, S. Nakajima, R. W. Rockhold

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


The authors applied a statistical method to subclassify tardive dyskinesia (TD) in 71 psychiatric patients. Based on two‐step statistical procedures and findings reported previously, TD is considered to consist of 2 subgroups: a classical dyskinesic group and a dystonic group. Symptoms manifested in the former group are seen most frequently in the oral region while the latter group, which is usually called tardive dystonia, is manifested by movement disorders in the trunk and extremities, predominantly. Abnormal movements occurring in the facial region characterize a population whose members may belong to either group.

Original languageEnglish
Pages (from-to)404-407
Number of pages4
JournalActa Psychiatrica Scandinavica
Issue number6
Publication statusPublished - 1990 Dec


  • multivariate analysis
  • tardive dyskinesia
  • tardive dystonia

ASJC Scopus subject areas

  • Psychiatry and Mental health


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