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Table 8 Summary of the Confirmatory 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

Models GFI AGFI CFI RMSEA RMR χ 2 df p χ 2/df ECVI
Model-A 0.79 0.58 0.32 0.34 0.29 528.06 14 <0.01 37.72 1.79
Model-B 0.98 0.95 0.98 0.06 0.04 22.26 10 0.01 2.23 0.19
Model-C 0.80 0.57 0.35 0.35 0.29 508.91 13 <0.01 39.15 1.74
Model-D 0.74 0.23 0.33 0.56 0.40 490.30 5 <0.01 98.06 1.65
Model-E 0.98 0.91 0.98 0.11 0.05 15.09 3 <0.01 5.031 0.13
  1. Model-A: 1-Factor model of the PSQI with all the seven components; Model-B: 1-Factor model of the PSQI with all the seven components and incorporation of modification index (correlations between error terms); Model-C: 2-Factor model of the PSQI (Factor-1 comprised of SLPQUAL, LATEN, DURAT, HSE, DISTB; Factor-2 comprised of MEDS, DAYDYS); Model-D: 1-Factor model of the PSQI with only five components (without MEDS and DAYDYS); Model-E: 1-Factor model of the PSQI with only five components (without MEDS and DAYDYS) with incorporation of modification index (correlations between error terms)
  2. GFI goodness of fit index, AGFI adjusted goodness of fit index, CFI comparative fit index, RMSEA root mean square error of approximation, RMR root mean square residual, ECVI expected cross-validation index
  3. SLPQUAL: PSQI component of sleep quality, LATEN: PSQI component of sleep latency, DURAT: PSQI component of sleep duration, HSE: PSQI component of sleep efficiency, DISTB: PSQI component of sleep disturbances, MEDS: PSQI component of sleep medication, DAYDYS: PSQI component of daytime dysfunction