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Effects of Deck Cadets’ Working Conditions on Quantity and Perceived Quality of Sleep Among Marine Science Students
Published in Adam Weintrit, Tomasz Neumann, Safety of Sea Transportation, 2017
The Pittsburgh Sleep Quality Index (PSQI) is a self-rated questionnaire which assesses sleep quality and disturbances over a 1-month time interval. Nineteen individual items generate seven "component" scores: subjective sleep quality, sleep latency, sleep duration, habitual sleep efficiency, sleep disturbances, use of sleeping medication, and daytime dysfunction. Each component takes a score between 0-3 ("0" is very good, "3" is very bad) and the sum of 7 component scores is the global PSQI score. The global score has a value between 0-21. The higher the global score, the worse the sleep quality. A global PSQI score of ≤5 indicates "good sleep quality" and a score of >5 indicates "poor sleep quality". The poor sleep quality suggests that at least two of the above mentioned components are severely impaired or three of the components are moderate impaired. The index is known to be valid and reliable in Turkish society (Buysse ve ark.,1989; Ağargün ve ark., 1996).
Do objective data support the claim that problematic smartphone use has a clinically meaningful impact upon adolescent sleep duration?
Published in Behaviour & Information Technology, 2022
Saoirse Mac Cárthaigh, John Perry, Claire Griffin
Sleep quality was assessed with the Pittsburgh Sleep Quality Index (PSQI) (Buysse et al. 1989). A systematic review and meta-analysis has demonstrated the robust psychometric properties of the PSQI (Mollayeva et al. 2016). Validation research also supports the use of the PSQI with adolescents (de la Vega et al. 2015). The scale has demonstrated strong internal consistency with Cronbach’s α= .80 (Carpenter & Andrykowski, 1998). The PSQI comprises seven subscales: subjective sleep quality, sleep onset latency (the time it takes to fall asleep), sleep duration, sleep efficiency (the ratio of total sleep time to time in bed), sleep disturbance (e.g. nocturnal awakening or breathing difficulties), use of sleep medication and daytime dysfunction (difficulty sustaining daytime wakefulness). Subscale scores are summed to produce a global score between 0 and 21. Lower scores indicate better sleep quality.
Who is sleepier on the night shift? The influence of bio-psycho-social factors on subjective sleepiness of female nurses during the night shift
Published in Ergonomics, 2018
Nataly Zion, Anat Drach-Zahavy, Tamar Shochat
Sleep quality over the past month was assessed using the Pittsburg Sleep Quality Index (PSQI) (Buysse et al. 1989). The PSQI is a self-rated questionnaire that assesses sleep quality and disturbances in the last month, and distinguishes between good and poor sleepers. Nineteen items are used to compute seven component scores: subjective sleep quality, sleep latency, sleep duration, habitual sleep efficiency, sleep disturbances, use of sleeping medication, and daytime dysfunction. The sum of all scores results in the global PSQI score, which ranges from 0 to 21. The cutoff for poor sleep quality was defined as PSQI > 5 (Buysse et al. 1989). The original tool has sensitivity of 89.6% and specificity of 86.5% (κ = 0.75, p < 0.001) and internal consistency α = 0.83. We used the translated Hebrew version with internal consistency α = 0.72 (Shochat et al. 2007). In the present study internal consistency was α = 0.72.
Effects of safety pattern, cabin ergonomics, and sleep on work-related stress and burnout of city and transit bus drivers in Lahore, Pakistan
Published in Ergonomics, 2022
Zahara Batool, Muhammad Waqas Younis, Ammar Yasir, Atteq Ur Rehman, Mudassar Dilawar, Mazhar Yasin, Muhammad Hamza, Saqib Shahzad, Muhammad Sarmad Ali, Arslan Jamil, Muhammad Haris Asghar Khan
Self-reported sleep quality of bus drivers is measured by using Pittsburg Sleep Quality Index (PSQI) (Buysse et al., 1989). PSQI scale can assess sleep quality over a one-month period from self–reports. It was initially used for clinical purposes but later on, it was accepted as a convenient tool in several patient groups including commercial drivers (De Pinho et al., 2006). PSQI is used for self-rated or reported questions. PSQI consists of seven components (i.e. sleep quality, sleep onset latency, sleep duration, sleep efficiency, sleep disturbances, sleep medication, and daytime dysfunction). Inventory score ranges from 0 to 21 and the participant had a score more than 5.0 is typically classified in the poor sleep category.