How do you interpret PSQI?
Scoring. The PSQI includes a scoring key for calculating a patient’s seven subscores, each of which can range from 0 to 3. The subscores are tallied, yielding a “global” score that can range from 0 to 21. A global score of 5 or more indicates poor sleep quality; the higher the score, the worse the quality.
Is PSQI ordinal data?
The data from the PSQI are ordinal rather than continuous and should not be analyzed using methods that assume they have metric properties.
How many questions are there in PSQI?
19
The Pittsburgh Sleep Quality Index (PSQI) contains 19 self-rated questions and 5 questions rated by the bed partner or roommate (if one is available). Only self-rated questions are included in the scoring. The 19 self-rated items are combined to form seven “component” scores, each of which has a range of 0-3 points.
What is the purpose of Psqi?
The Pittsburgh Sleep Quality Index was developed with several goals: (1) to provide a reliable, valid, and standardized measure of sleep quality; (2) to discriminate between “good” and “poor” sleepers; (3) to provide an index that is easy for subjects to use and for clinicians and researchers to interpret; and (4) to …
How is PSQI calculated?
The global PSQI score is then calculated by totaling the seven component scores, providing an overall score ranging from 0 to 21, where lower scores denote a healthier sleep quality. Traditionally, the items from the PSQI have been summed to create a total score to measure overall sleep quality.
How is Psqi calculated?
What is the highest PSQI score?
0-21 points
The PSQI global score has a possible range of 0-21 points. Actual scores ranged from 0 to 20 points, with an overall group mean of 7.4, median of 6.0, and SD of 5.1. For individual components, each with a possible range of 0-3, the observed ranges were 0-3.
Is the Psqi free?
The Pittsburgh Sleep Quality Index (PSQI): A new instrument for psychiatric research and practice. This copyright in this form is owned by the University of Pittsburgh and may be reprinted without charge only for non-commercial research and educational purposes.
What are the components of PSQI?
PSQI contains 7 components including subjective sleep quality, sleep latency, sleep duration, sleep efficiency, sleep disturbance, use of sleep medication, and daytime dysfunction. Jessie S.M. Chan,
How reliable is the PSQI scale?
The reliability of the scale is considered good with Cronbach’s alpha of 0.83 for the total score. Test–retest reliability is also considered good. The validity of PSQI has been described by the authors as good with a sensitivity of 89.6% and a specificity of 86.5% of patients versus control subjects.
Is the PSQI a useful self-rating tool of sleep quality?
This review critically appraises the evidence for dimensionality of one of the most widely used self-rating instruments of sleep quality, the PSQI [ 4, 15, 17 ]. The PSQI is the most widely used sleep health assessment tool in both clinical and non-clinical populations.
Does time interaction affect PSQI scores?
The group by time interaction in the PSQI total score was marginally not significant ( F = 2.78, P = 0.064).