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Table 7 Factor loadings in exploratory factor analysis of the Pittsburgh Sleep Quality Index in community dwelling Ethiopian adults

From: Validation of the Pittsburgh sleep quality index in community dwelling Ethiopian adults

Components of the PSQI

PSQI (Seven components)

PSQI (Five components)

Factor 1

Factor 2

Factor 3

Factor 1

Factor 2

PSQI component of sleep quality

.88

.05

.08

.88

.05

PSQI component of sleep latency

.87

−.13

.18

.87

−.13

PSQI component of sleep duration

.10

−.96

.01

.10

−.97

PSQI component of sleep efficiency

.09

−.97

.06

.09

−.97

PSQI component of sleep disturbances

.62

−.13

.08

.62

−.12

PSQI component of sleep medication

.16

−.03

.78

  

PSQI component of daytime dysfunction

.06

−.03

.81

  
  1. Principal component analysis with direct oblimin rotation (Kaiser Normalization) was employed. PSQI Pittsburgh sleep quality index