Initial development of a sleep health literacy scale.

Objectives: Health literacy includes the skills necessary for effective communication with health professionals, understanding health instructions, and recognizing health needs. Our study aimed to create a novel measure of sleep health literacy-an individual's capacity to comprehend sleep-related information and navigate sleep-related healthcare services.

Methods: The Sleep Health Literacy scale consists of two subscales: "Sleep Health Communication" (11 Likert-scale items assessing access to resources and communication with healthcare providers) and "Sleep Health Knowledge" (46 true/false items assessing specific knowledge of sleep health). The Sleep Health Literacy scale was completed by 154 undergraduate students (mean age=20.96years; 79.87% female) in study 1. In study 2, an additional sample of 251 participants (mean age=20.23years; 79.87% female) completed the Sleep Health Literacy scale, along with measures of convergent and discriminant validity.

Results: Exploratory factor analysis results in study 1 revealed a two-factor structure for the "Sleep Health Communication" subscale ("comprehension" and "critical application"). The subscale demonstrated good internal consistency (α = 0.81) and inter-item and item-total correlations. On the "Sleep Health Knowledge" subscale, participants answered 76.36% of items correctly. In study 2, the Sleep Health Literacy had good convergent validity with Sleep Beliefs Scale and the All Aspect of Health Literacy Scale.

Conclusions: The Sleep Health Literacy scale offers a standardized measure to assess sleep health literacy, an understudied domain that has important links to health. This measure may allow researchers and clinicians to better understand how to improve sleep health. Further validation of the Sleep Health Literacy scale is warranted in more diverse samples.