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Table 2 Factor matrix of the 2-Factor model of the Pittsburgh Sleep Quality Index in the collegiate young adults

From: Dimensionality of the Pittsburgh Sleep Quality Index in the young collegiate adults

Pittsburgh Sleep Quality Index (PSQI) component

Sleep qualitya

Sleep efficiencya

Communality (h2)

PSQI component of overall sleep quality

.723

.104

.416

PSQI component of daytime dysfunction

.468

−.019

.513

PSQI component of sleep duration

.404

−.020

.502

PSQI component of sleep medication

−.160

.659

.508

PSQI component of sleep disturbances

.191

.502

.387

PSQI component of sleep efficiency

.121

.397

.620

PSQI component of sleep latency

.344

.387

.644

Percentage of total variance (%)

35.045

16.228

.416

  1. Exploratory Factor analysis (EFA) with maximum likelihood extraction and direct oblimin rotation method was performed
  2. aLatent factors derived from EFA