Distribution-based estimates of minimal important difference for hospital anxiety and depression scale and impact of event scale-revised in survivors of acute respiratory failure

Kitty S Chan¹, Lisa Aronson Friedman², O Joseph Bienvenu³, Victor D Dinglas², Brian H Cuthbertson⁴, Richard Porter⁵, Christina Jones⁶, Ramona O Hopkins⁷, Dale M Needham⁸

Affiliations

¹ Department of Health Policy and Management, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA. Electronic address: kchan10@jhu.edu.
² Outcomes After Critical Illness and Surgery (OACIS) Group, Johns Hopkins University School of Medicine, Baltimore, MD, USA; Division of Pulmonary and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
³ Outcomes After Critical Illness and Surgery (OACIS) Group, Johns Hopkins University School of Medicine, Baltimore, MD, USA; Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, MD, USA; Department of Mental Health, Johns Hopkins University Bloomberg, School of Public Health, Baltimore, MD.
⁴ Department of Critical Care Medicine, Sunnybrook Health Sciences Centre, Toronto, ON, Canada; Department of Anesthesia, University of Toronto, Toronto, ON, Canada.
⁵ Glenfield Hospital, Leicester, UK.
⁶ University of Liverpool, Liverpool, UK.
⁷ Department of Medicine, Pulmonary and Critical Care Division, Intermountain Medical Center, Murray, UT, USA; Center for Humanizing Critical Care, Intermountain Health Care, Murray, UT, USA; Psychology Department and Neuroscience Center, Brigham Young University, Provo, UT, USA.
⁸ Outcomes After Critical Illness and Surgery (OACIS) Group, Johns Hopkins University School of Medicine, Baltimore, MD, USA; Division of Pulmonary and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA; Department of Physical Medicine and Rehabilitation, Johns Hopkins University School of Medicine, Baltimore, MD, USA.

PMID: 27638969
PMCID: PMC5027977
DOI: 10.1016/j.genhosppsych.2016.07.004

Distribution-based estimates of minimal important difference for hospital anxiety and depression scale and impact of event scale-revised in survivors of acute respiratory failure

Kitty S Chan et al. Gen Hosp Psychiatry. 2016 Sep-Oct.

. 2016 Sep-Oct:42:32-5.

doi: 10.1016/j.genhosppsych.2016.07.004. Epub 2016 Jul 12.

Authors

Kitty S Chan¹, Lisa Aronson Friedman², O Joseph Bienvenu³, Victor D Dinglas², Brian H Cuthbertson⁴, Richard Porter⁵, Christina Jones⁶, Ramona O Hopkins⁷, Dale M Needham⁸

Affiliations

¹ Department of Health Policy and Management, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA. Electronic address: kchan10@jhu.edu.
² Outcomes After Critical Illness and Surgery (OACIS) Group, Johns Hopkins University School of Medicine, Baltimore, MD, USA; Division of Pulmonary and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
³ Outcomes After Critical Illness and Surgery (OACIS) Group, Johns Hopkins University School of Medicine, Baltimore, MD, USA; Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, MD, USA; Department of Mental Health, Johns Hopkins University Bloomberg, School of Public Health, Baltimore, MD.
⁴ Department of Critical Care Medicine, Sunnybrook Health Sciences Centre, Toronto, ON, Canada; Department of Anesthesia, University of Toronto, Toronto, ON, Canada.
⁵ Glenfield Hospital, Leicester, UK.
⁶ University of Liverpool, Liverpool, UK.
⁷ Department of Medicine, Pulmonary and Critical Care Division, Intermountain Medical Center, Murray, UT, USA; Center for Humanizing Critical Care, Intermountain Health Care, Murray, UT, USA; Psychology Department and Neuroscience Center, Brigham Young University, Provo, UT, USA.
⁸ Outcomes After Critical Illness and Surgery (OACIS) Group, Johns Hopkins University School of Medicine, Baltimore, MD, USA; Division of Pulmonary and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA; Department of Physical Medicine and Rehabilitation, Johns Hopkins University School of Medicine, Baltimore, MD, USA.

PMID: 27638969
PMCID: PMC5027977
DOI: 10.1016/j.genhosppsych.2016.07.004

Abstract

Objective: This study will estimate distribution-based minimal important difference (MID) for the Hospital Anxiety and Depression Scale anxiety (HADS-A) and depression (HADS-D) subscales, and the Impact of Event Scale-Revised (IES-R) in survivors of acute respiratory failure (ARF).

Methods: Secondary analyses of data from two US and three UK studies of ARF survivors (total N=1223). HADS-D and HADS-A were used to assess depression and anxiety symptoms. IES-R assessed post-traumatic stress disorder symptoms. Standard error of measurement, minimal detectable change90, 0.5 standard deviation (S.D.), and 0.2 S.D. were used to estimate MID for the combined sample, by studies, 6- and 12-month follow-ups, country and mental health condition.

Results: Overall, MID estimates converged to 2.0-2.5 for the HADS-A, 1.9-2.3 for the HADS-D and 0.17-0.18 for the IES-R. MID estimates were comparable across studies, follow-up, country and mental health condition.

Conclusion: Among ARF survivors, 2.0-2.5 is a reasonable range for the MID for both HADS subscales, and 0.2 is reasonable for IES-R. Until anchor-based MIDs for these instruments are available, these distribution-based estimates can help researchers plan future studies and interpret the clinical importance of findings in ARF patient populations.

Keywords: Acute respiratory failure; Hospital anxiety and depression scale; Impact of event scale-revised; Minimal important difference.

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References

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Distribution-based estimates of minimal important difference for hospital anxiety and depression scale and impact of event scale-revised in survivors of acute respiratory failure

Affiliations

Distribution-based estimates of minimal important difference for hospital anxiety and depression scale and impact of event scale-revised in survivors of acute respiratory failure

Authors

Affiliations

Abstract

References

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Grants and funding

LinkOut - more resources

Full Text Sources

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Medical