The SHI is a 13-item self-administered Likert scale index that assesses behavioural patterns associated with sleep hygiene practices. Responses to each item are based on the frequency with which the person engages in the behaviour from 1 (never) to 5 (always). Items are summed to provide a global assessment of sleep hygiene with scores ranging from 13–65. Higher global scores are indicative of more maladaptive sleep hygiene practices.
The Sleep Hygiene Index (SHI) is a 13-item self-administered index intended to assess the presence of behaviors thought to comprise sleep hygiene. Participants are asked to indicate how frequently they engage in specific behaviors (always, frequently, sometimes, rarely, never). Items constructing the Sleep Hygiene Index are derived from the diagnostic criteria for inadequate sleep hygiene in the International Classification of Sleep Disorders (American Sleep Disorders Association, 1990). Item scores were summed providing a global assessment of sleep hygiene. Higher scores are indicative of more maladaptive sleep hygiene status.
