ABSTRACT
Objectives
This study aimed to validate the Korean version of the sleep hygiene practice scale (SHPS-K) and determine its effectiveness in screening poor sleepers with insomnia.
Methods
Online survey was conducted using translated SHPS in Korean, the Korean versions of the Pittsburgh Sleep Quality Index (PSQI-K), Insomnia Severity Index (ISI-K), and Epworth Sleepiness Scale (KESS) in a non-clinical population. The internal consistency and test-retest reliability of the SHPS-K were assessed using Cronbach’s alpha and intraclass correlation coefficients (ICC), respectively. Construct validity was evaluated using correlation analyses with other questionnaires and confirmatory factor analysis. We determined the cutoff values that could identify poor sleepers with insomnia symptoms (PSQI-K > 5 and ISI-K ≥ 15) using receiver operating characteristic analysis.
Results
A total of 484 participants (242 women, mean age of 43.8 years) were enrolled. The average SHPS-K score was 71.2, with no significant sex differences. Women had poorer sleep scheduling and timing behaviors, and men had poorer eating and drinking behaviors. Good internal consistency (Cronbach’s alpha = 0.88) and test-retest reliability (ICC = 0.80) were observed. The SHPS-K was positively correlated with the PSQI-K (r = 0.55), ISI-K (r = 0.54), and KESS (r = 0.42). A cutoff value of 73 identified poor sleepers with insomnia (area under the curve = 0.828).
Conclusions
The SHPS-K is a reliable instrument for evaluating sleep hygiene in non-clinical Korean populations.
Acknowledgments
We are grateful to Byungjin Choe for participating in backtranslation of SHPS-K.
Disclosure statement
No potential conflict of interest was reported by the author(s).
Author contributions
Conceptualization: Kim DY, Kim JH
Data curation: Kim DY
Formal analysis: Lee HA
Methodology: Yun JY, Kim JH
Validation: Song P, An HY, Yang CM
Investigation: Kim DY, Yun JY, Kim JH
Writing – original draft: Kim DY, Yun JY, Kim JH
Writing – review & editing: Song P, Yang CM, Kim JH
Supplementary Material
Supplemental data for this article can be accessed online at https://doi.org/10.1080/15402002.2024.2367461.