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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