Skip to main content

Table 1 Published studies investigating two- or three- factor scoring models for the Pittsburgh Sleep Quality Index with samples description

From: Exploration of dimensionality and psychometric properties of the Pittsburgh Sleep Quality Index in cases with temporomandibular disorders

Study Sample N N of factors Dimensions labels
Cole et al. [6] USA community-dwelling depressed and nondepressed adults > 60 years 417 Three-factor Sleep Efficiency (sleep duration, habitual sleep efficiency)
Perceived Sleep Quality (subjective sleep quality, sleep latency, use of sleep medication)
Daily Disturbances (sleep disturbances, daytime dysfunction)
Aloba et al. [7] Nigerian university students 520 Three-factor First factor (subjective sleep quality, sleep latency, habitual sleep efficiency, sleep disturbances, use of sleep medication)
Second factor (sleep duration and sleep disturbances)
Third factor (subjective sleep quality, habitual sleep efficiency, use of sleep medication)
Magee et al. [8] Australian adults aged 18 to 59 years 364 Two- and three-factor Same factors as Cole et al. for the three- and without Daily Disturbances for the two-factor model
Burkhalter et al. [9] Swiss renal transplant recipients 135 Three-factor Same factors as Cole et al. [6]
Mariman et al. [10] Belgian chronic fatigue syndrome patients 413 Three-factor Same factors as Cole et al. [6]
  1. The individual study’s suggested PSQI dimensions labels are written in italic and bold text and the original PSQI components belonging to each suggested dimension are listed in parentheses after each dimension label.