Insomnia Severity Index: A reliability generalisation meta-analysis.

J Sleep Res

Department of Education and Psychology, Campus Universitário de Santiago, University of Aveiro, Aveiro, Portugal.

Published: August 2023

The aim of the current study was to conduct a reliability generalisation (RG) meta-analysis of Cronbach's alpha for the Insomnia Severity Index (ISI). A systematic search of three databases (PubMed, Scopus, and Web of Science) from inception to 12 March 2021 was performed. Publications that reported Cronbach's alpha for the total ISI score were included. Only psychometric-focussed studies were considered. Meta-analysis was carried out using a random-effects model to derive a pooled estimate of Cronbach's alphas. The number of participants in the included publications ranged from 25 to 12,056, with 33 studies (42 estimates) comprising internal consistency coefficients, and a combined sample size of N = 29,688. The age range of the included publications was from 13.4 to 74.3 years. Data extraction implied 33 publications out of 706 found through the database search. Cronbach's alphas ranged from 0.65 to 0.92. The majority of the reported coefficients were ≥0.7 and presented a low risk of bias (n = 32). The pooled alpha coefficient was 0.83 (IC [0.81-0.85]; SE = 0.009) with high heterogeneity among the included publications (I  = 97%). Subgroup analyses including moderators such as continent, setting, risk of bias, and age did not affect significantly the overall result. In general, the cumulative estimate of Cronbach's alpha for the ISI is good. However, this finding should be interpreted with caution since there is a high heterogeneity level and some of the studies might not have checked the assumptions underlying Cronbach's alphas.

Download full-text PDF

Source
http://dx.doi.org/10.1111/jsr.13835DOI Listing

Publication Analysis

Top Keywords

cronbach's alpha
12
cronbach's alphas
12
included publications
12
insomnia severity
8
reliability generalisation
8
generalisation meta-analysis
8
estimate cronbach's
8
risk bias
8
high heterogeneity
8
cronbach's
6

Similar Publications

Background: The positive association of parental phubbing with internalizing and externalizing problems among adolescents has gained academic traction. However, current researches on the negative impacts of parental phubbing have focused primarily on adolescents, with a noticeable lack of studies concerning preschool children, and there is also a deficiency in investigations from the perspective of the Risky Family Model. These gaps limit our understanding of how parental phubbing affects problem behaviors among preschool children.

View Article and Find Full Text PDF

Background: Vocal fatigue involves self-perceived vocal symptoms and reduced physiological capacity. This study aimed to adapt and validate the Vocal Fatigue Index (VFI), a tool originally designed to distinguish between patients with vocal fatigue and vocally healthy individuals, for Italian speakers.

Method: A four-step translation and validation process was employed.

View Article and Find Full Text PDF

Objectives: Intimate partner violence (IPV) threatens women's health and safety. Support services can mitigate the impact, yet few survivors seek services in part due to social norms that discourage use. Little agreement exists on how to measure norms and attitudes related to IPV help-seeking.

View Article and Find Full Text PDF

Background: It is important for health care professionals to use evidence-based practice during  surgical procedures to ensure patient safety and prevent medical errors.

Aims: The aim of this study was to examine the relationship between surgical nurses' perceptions of their work environment's support for evidence-based practice and their attitudes toward medical errors.

Methods: The descriptive cross-sectional study was conducted between February and May 2023.

View Article and Find Full Text PDF

Objectives: Wishes to hasten death (WTHDs) are common in patients with serious illness. The Schedule of Attitudes Toward Hastened Death (SAHD) is a validated 20-item instrument for measuring WTHD. Two short versions have also been developed based on statistical item selection.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!