The Efficacy of ICU Diary on Sleep, Fatigue and Stress

sleep disturbance

General Sleep disturbances Scale (GSDS) GSDS was used to measure sleep disturbances (Lee, 2007). The GSDS is a 21-item self-report instrument that assesses sleep patterns during the previous week across seven domains: difficulty initiating sleep, mid-sleep awakenings, early awakenings, sleep quality, sleep quantity, daytime sleepiness, and use of substances to aid sleep (Lee, 1992). Items are rated on an 8-point Likert scale ranging from 0 (never) to 7 (every day). A mean item or subscale score ≥ 3 indicates sleep disturbances (Lee, 1992).

Time frame: baseline and one week later

fatigue severity

7-item Lee's Fatigue Scale (LFS) Fatigue was assessed using the 7-item Lee Fatigue Scale (LFS) (Lee et al., 1991; Tsai et al., 2014). Items are rated from 0 (not at all) to 10 (extremely), with higher scores indicating greater fatigue severity. A mean score \> 3.3 indicates clinically significant fatigue (Lee et al., 1991).

Time frame: baseline and one week later

stress

Impact of Event Scale-Revised (IES-R) Perceived stress was assessed using IES-R, which consists of 22 items across three subscales, including intrusion, avoidance, and hyperarousal symptoms related to a traumatic event (Weiss \& Marmar, 1997; Wu \& Chan, 2003). Total scores range from 0 to 88, with higher scores indicating greater distress. A total score ≥ 33 or a mean item score ≥ 1.5 has been suggested as indicative of a higher risk of PTSD (Creamer et al., 2003).

Time frame: baseline and one week later

Coping

Brief Coping Orientation to Problems Experienced (Brief COPE) The Brief COPE was used to measure coping strategies, which is a 28-item self-report instrument designed to assess coping responses to stress (Carver, 1997; Su et al., 2015). Items are rated on a 4-point Likert scale ranging from 1 (I have not been doing this at all) to 4 (I have been doing this a lot), with higher scores indicating more frequent use of a coping strategy. Brief COPE scores were categorized into three dimensions, including active coping, dysfunctional coping, and distraction coping, based on a factor structure validated among Taiwanese caregivers of children with chronic illness (Tang et al., 2021).