Temporal Stability of the Ford Insomnia Response to Stress Test (FIRST).

TitleTemporal Stability of the Ford Insomnia Response to Stress Test (FIRST).
Publication TypeJournal Article
Year of Publication2016
AuteursJarrin, DC, Chen, IY, Ivers, H, Drake, CL, Morin, CM
JournalJ Clin Sleep Med
Volume12
Issue10
Pagination1373-1378
Date Published2016 Oct 15
ISSN1550-9397
KeywordsAdaptation, Psychological, Female, Follow-Up Studies, Humans, Male, Middle Aged, Psychometrics, Self Report, Sleep Initiation and Maintenance Disorders, Stress, Psychological, Surveys and Questionnaires, Time
Abstract

STUDY OBJECTIVES: The Ford Insomnia Response to Stress Test (FIRST) is a self-report tool that measures sleep reactivity (i.e., vulnerability to experience situational insomnia under stressful conditions). Sleep reactivity has been termed a "trait-like" vulnerability; however, evidence of its long-term stability is lacking. The main objective of the current psychometric study was to investigate the temporal stability of the FIRST over two 6-mo intervals in a population-based sample of adults with and without insomnia. The temporal stability of the FIRST was also compared with the temporal stability of other scales associated with insomnia (trait-anxiety, arousability).METHODS: Participants included 1,122 adults (mean age = 49.9 y, standard deviation = 14.8; 38.8% male) presenting with an insomnia syndrome (n = 159), insomnia symptoms (n = 152), or good sleep (n = 811). Participants completed the FIRST, the State-Trait Anxiety Inventory (trait-anxiety), and the Arousal Predisposition Scale (arousability) on three different occasions: baseline and at 6- and 12-mo follow-up. Intraclass correlation coefficients (ICCs) were computed for all scales (baseline to 6 mo and 6 to 12 mo).RESULTS: The FIRST yielded strong temporal stability from baseline to 6 mo among those with insomnia syndrome (ICC = 0.81), symptoms (ICC = 0.78), and good sleep (ICC = 0.81). Similar results were observed for 6 to 12 mo among those with insomnia syndrome (ICC = 0.74), insomnia symptoms (ICC = 0.82), and good sleep (ICC = 0.84). The stability of the FIRST was not comparable with the stability of trait-anxiety, but was somewhat comparable with the stability of arousability.CONCLUSIONS: Overall, the FIRST is a temporally reliable stable scale over 6-mo intervals. Future research is needed to corroborate the stability and trait-like measures of sleep reactivity with physiological, behavioural and personality measures.

DOI10.5664/jcsm.6192
Alternate JournalJ Clin Sleep Med
PubMed ID27568895
PubMed Central IDPMC5033739