Heart rate reactivity and current post-traumatic stress disorder when data are missing

Haekyung Jeon-Slaughter, Phebe Tucker, Betty Pfefferbaum, Carol S North, Bernardo Borba De Andrade, Barbara Neas

Research output: Contribution to journalArticle

Abstract

Aims: This study demonstrates that auxiliary and exclusion criteria variables increase the effectiveness of missing imputation in correcting underestimation of physiologic reactivity in relation to post-traumatic stress disorder (PTSD) caused by deleting cases with missing physiologic data. Methods: This study used data from survivors of the 1995 Oklahoma City bombing and imputed missing heart rate data using auxiliary and exclusion criteria variables. Logistic regression was used to examine heart rate reactivity in relation to current PTSD. Results: Of 113 survivors who participated in the bombing study's 7-year follow-up interview, 42 (37%) had missing data on heart rate reactivity due to exclusion criteria (medical illness or use of cardiovascular or psychotropic medications) or non-participation. Logistic regression results based on imputed heart rate data using exclusion criteria and auxiliary (the presence of any current PTSD arousal symptoms) variables showed that survivors with current bombing-related PTSD had significantly higher heart rates at baseline and recovered more slowly back to baseline heart rate during resting periods than survivors without current PTSD, while results based on complete cases failed to show significant correlations between current PTSD and heart rates at any assessment points. Conclusions: Suggested methods yielded an otherwise undetectable link between physiology and current PTSD.

Original languageEnglish (US)
Pages (from-to)451-458
Number of pages8
JournalPsychiatry and Clinical Neurosciences
Volume65
Issue number5
DOIs
StatePublished - Aug 1 2011

Keywords

  • auxiliary variable
  • exclusion criteria variable
  • heart rate
  • multiple imputations
  • post-traumatic stress disorder

ASJC Scopus subject areas

  • Neuroscience(all)
  • Neurology
  • Clinical Neurology
  • Psychiatry and Mental health

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