Validation study of the Italian version of the Sleep Hygiene Index

Validation of the Korean version of the Sleep Hygiene Practice Scale in a Non-Clinical Population

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.

The impact of COVID-19 on Italian adolescents' sleep and its association with psychological factors

Insomnia and circadian dysregulation during adolescence represent important risk factors for emotional and psychological problems. Recent studies have shown that the coronavirus disease 2019 (COVID‐19) pandemic has been linked to a high prevalence of behavioural sleep problems in the general population. This study aimed to provide two pictures of two different time points of the pandemic regarding the prevalence of sleep problems in adolescents and their association with psychological health variables. Two different independent large samples of Italian adolescents aged 13–17 years were recruited at two pandemic time points. A total of 1,146 adolescents at Time 1 (T1; April 2020) and 1,406 at Time 2 (T2; April 2021) took part in the study. Measures of insomnia symptoms, sleep hygiene, chronotype, psychological distress and emotion regulation were collected. Prevalence of insomnia was 12.13% at T1 and 23.19% at T2. Furthermore, high levels of poor sleep habits (late bedtime, poor sleep hygiene, use of electronic devices at bedtime) were also detected at both time points. Insomnia symptoms strongly correlated with poor sleep hygiene, higher psychological distress, and emotional suppression at both time points. Results highlighted an alarming picture for two large samples at two different time points of the pandemic that showed a potential negative impact of the COVID‐19 pandemic, in both the first outbreak and in the later phase of the pandemic, on sleep habits, psychological distress and insomnia symptoms in adolescents. This strongly suggests the need for monitoring these variables and their interaction in the post‐pandemic period and to develop and promote interventions for insomnia and circadian disturbances during adolescence.