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KMID : 1034320180090020092
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Sleep Medicine Research
2018 Volume.9 No. 2 p.92 ~ p.96
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Validation of the Korean Ford Insomnia Response to Stress Test Questionnaire
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Chang Jin-Young
Suh Soo-Yeon
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Abstract
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Background and Objective: This study aimed to examine psychometric properties of the Korean Ford Insomnia Response to Stress Test (K-FIRST). The FIRST measures personal vulnerability of sleep difficulties in response to stressful events.
Methods: 377 participants (mean age = 21.80 ± 2.91 years, 76.9% female) completed online surveys about demographic information, sleep reactivity (K-FIRST), insomnia (Insomnia Severity Index, ISI), perceived stress (Perceived Stress Scale, PSS), and depression (Center for Epidemiological Studies-Depression Scale, CES-D). Exploratory factor analysis was conducted to determine the factor structure of the K-FIRST.
Results: K-FIRST showed adequate internal consistency (Cronbach’s α = 0.85) and significant goodness of fit test result (χ2 = 1386.33, p < 0.001). A two-factor structure was selected as a result of the factorial analysis, with rumination and worry as the two factors. K-FIRST was significantly associated with the ISI (r = 0.35, p < 0.01), PSS (r = 0.30, p < 0.01), and CES-D (r = 0.42, p < 0.01).
Conclusions: The results of this present study supported the reliability and validity of K-FIRST. It is expected that the K-
FIRST can be used in future research in investigating personal vulnerabilities that may predispose individuals to sleep disturbance.
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KEYWORD
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Sleep difficulties, Insomnia, Sleep reactivity, Validation, Worry and rumination
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