Validation of the Japanese version of the Ford Insomnia Response to Stress Test and the association of sleep reactivity with trait anxiety and insomnia

Shun Nakajima; Isa Okajima; Taeko Sasai; Mina Kobayashi; Naomichi Furudate; Christopher L Drake; Thomas Roth; Yuichi Inoue

doi:10.1016/j.sleep.2013.09.022

Validation of the Japanese version of the Ford Insomnia Response to Stress Test and the association of sleep reactivity with trait anxiety and insomnia

Sleep Med. 2014 Feb;15(2):196-202. doi: 10.1016/j.sleep.2013.09.022. Epub 2013 Dec 2.

Authors

Shun Nakajima¹, Isa Okajima², Taeko Sasai³, Mina Kobayashi⁴, Naomichi Furudate⁵, Christopher L Drake⁶, Thomas Roth⁶, Yuichi Inoue⁷

Affiliations

¹ Department of Somnology, Tokyo Medical University, Tokyo, Japan; Department of Psychiatry, Tokyo Medical University, Tokyo, Japan; Japan Somnology Center, Neuropsychiatric Research Institute, Tokyo, Japan; Yoyogi Sleep Disorder Center, Tokyo, Japan.
² Department of Somnology, Tokyo Medical University, Tokyo, Japan; Japan Somnology Center, Neuropsychiatric Research Institute, Tokyo, Japan; Yoyogi Sleep Disorder Center, Tokyo, Japan.
³ Department of Somnology, Tokyo Medical University, Tokyo, Japan; Japan Somnology Center, Neuropsychiatric Research Institute, Tokyo, Japan.
⁴ Department of Somnology, Tokyo Medical University, Tokyo, Japan; Department of Psychiatry, Tokyo Medical University, Tokyo, Japan; Yoyogi Sleep Disorder Center, Tokyo, Japan.
⁵ Department of Somnology, Tokyo Medical University, Tokyo, Japan; Department of Psychiatry, Tokyo Medical University, Tokyo, Japan.
⁶ Henry Ford Hospital Sleep Disorders and Research Center, Detroit, MI, USA; Department of Psychiatry and Behavioral Neurosciences, Wayne State College of Medicine, Detroit, MI, USA.
⁷ Department of Somnology, Tokyo Medical University, Tokyo, Japan; Department of Psychiatry, Tokyo Medical University, Tokyo, Japan; Japan Somnology Center, Neuropsychiatric Research Institute, Tokyo, Japan; Yoyogi Sleep Disorder Center, Tokyo, Japan. Electronic address: inoue@somnology.com.

PMID: 24380783
DOI: 10.1016/j.sleep.2013.09.022

Abstract

Objective: Our study was conducted to validate the Japanese version of the Ford Insomnia Response to Stress Test (FIRST-J) and to clarify the association of the measure with trait anxiety and insomnia in healthy subjects and insomnia patients.

Methods: We studied 161 healthy subjects and 177 insomnia patients who completed the FIRST-J, Pittsburgh Sleep Quality Index (PSQI), Athens Insomnia Scale (AIS), and State-Trait Anxiety Inventory-Trait (STAI). The healthy subjects and the insomnia patients were classified, respectively, into two groups with high FIRST-J and low FIRST-J scores (divided by the median value of healthy subjects).

Results: Cronbach α coefficients of the FIRST-J in the insomnia patients and healthy subjects were 0.89 and 0.87, respectively. Factor analysis revealed that the FIRST-J had a single-factor structure. The FIRST-J score significantly correlated with all other measures in the healthy subjects, though the score only correlated with the score of the STAI in the insomnia patients. The healthy subjects with high FIRST-J scores showed higher scores of the AIS and STAI than those with low FIRST-J scores. Furthermore, insomnia patients had a higher total score of the FIRST-J than the healthy subjects.

Conclusions: The FIRST-J is an important tool for assessing vulnerability to insomnia.

Keywords: Anxiety; Ford insomnia response to stress test; Insomnia; Scale; Sleep reactivity; Stress.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Anxiety / complications*
Anxiety / diagnosis
Case-Control Studies
Female
Humans
Japan
Male
Middle Aged
Personality Inventory
Reproducibility of Results
Sensitivity and Specificity
Sleep
Sleep Initiation and Maintenance Disorders / etiology*
Sleep Initiation and Maintenance Disorders / psychology
Stress, Psychological / complications*
Stress, Psychological / diagnosis
Surveys and Questionnaires