Inja Kim; Sungjae Kim; Beomjong Kim; Heejung Choi

doi:10.4040/jkan.2012.42.6.853

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Original Article
Psychometric Properties of Korean Minimal Insomnia Screening Scale: Inja Kim, Sungjae Kim, Beomjong Kim, Heejung Choi; Journal of Korean Academy of Nursing 2012;42(6):853-860.
DOI: https://doi.org/10.4040/jkan.2012.42.6.853
Published online: December 31, 2012

¹Department of Nursing, Daejeon University, Daejeon, Korea.

²College of Nursing, Seoul National University, Seoul, Korea.

³Department of Business Administration, Seowon University, Cheongju, Korea.

⁴Department of Nursing, Konkuk University, Chungju, Korea.

Address reprint requests to: Choi, Heejung. Department of Nursing, Konkuk University, 268 Chungwon-daero, Chungju, Chungbuk 380-701, Korea. Tel: +82-43-840-3954, Fax: +82-43-840-9329, hjchoi98@kku.ac.kr

• Received: January 27, 2012 • Accepted: November 15, 2012

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Abstract
NOTES
REFERENCES

Abstract

Purpose
The purposes of this study were to develop a Minimal Insomnia Screening Scale for Korean adults (KMISS) and to evaluate psychometric properties and discriminant ability of the developed scale.
Methods
Data from a cross-sectional survey of 959 Korean adults were analyzed to develop the summated insomnia scale, which was evaluated in terms of reliability, validity, and discriminant ability by receiver operating characteristics (ROC) curve analysis.
Results
Item-total correlations ranged between .71-.79 and Cronbach's α was .87. Adequate validity was also evident. ROC-curve analysis showed area under ROC was .87 (95% CI: .84-.90) and identified the optimal cut-off score as ≤ 20 (sensitivity, .83; specificity, .75; positive/negative predictive values, .40/.95). Using this cut-off score, the prevalence of insomnia in the study sample was 26.3% and most frequent among women and the oldest group.
Conclusion
Data supports the psychometric properties of KMISS as a possible insomnia screening instrument. KMISS also shows promise as a convenient ultra-short screening measure of insomnia for adults and epidemiological studies in community health care settings.
Keywords: Sleep; Self-report; Questionnaire; Psychometrics

This work was supported by the National Research Foundation of Korea Grant funded by Korean Government (NRF-2011-32A-H00007).

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Table 1

Demographic Characteristics and Sleep Status of Participants according to Gold Standard (N=959)

Table 2

Reliability of Korean Minimal Insomnia Screening Scale (KMISS)

Table 3

Sensitivity, Specificity, Positive Predictive Value (PPV), Negative Predictive Value (NPV) and Youden's Index according to Cut-off Scores

Table 4

Prevalence of Insomnia according to Different KMISS Cut-off Scores

KMISS=Korean minimal insomnia screening scale.

Figure & Data

REFERENCES

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Psychometric Properties of Korean Minimal Insomnia Screening Scale

J Korean Acad Nurs. 2012;42(6):853-860. Published online December 31, 2012

DOI: https://doi.org/10.4040/jkan.2012.42.6.853

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Psychometric Properties of Korean Minimal Insomnia Screening Scale

Table 1

Demographic Characteristics and Sleep Status of Participants according to Gold Standard (N=959)

Table 2

Reliability of Korean Minimal Insomnia Screening Scale (KMISS)

Table 3

Sensitivity, Specificity, Positive Predictive Value (PPV), Negative Predictive Value (NPV) and Youden's Index according to Cut-off Scores

Table 4

Prevalence of Insomnia according to Different KMISS Cut-off Scores

KMISS=Korean minimal insomnia screening scale.

Table 1 Demographic Characteristics and Sleep Status of Participants according to Gold Standard (N=959)

Table 2 Reliability of Korean Minimal Insomnia Screening Scale (KMISS)

Table 3 Sensitivity, Specificity, Positive Predictive Value (PPV), Negative Predictive Value (NPV) and Youden's Index according to Cut-off Scores