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Table 6 Summary of the sample size adequacy measures and 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

Measures PSQI (Seven components) PSQI (Five components)
Kaiser-Meyer-Olkin Test of Sampling Adequacy 0.51 0.52
Bartlett’s test of Sphericity <0.001 <0.001
Anti-image matrix 0.39–0.67 0.48–0.64
Determinant 0.08 0.09
Number of factors
 Kaiser’s criteria (Eigenvalue > 1) 3 2
 Cumulative variance rule (>40%) 2 1
 Scree plot 3 2
 Parallel analysis 3 2
  1. PSQI Pittsburgh sleep quality index