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Table 2 D-study results for the five domains and the overall scale for P  × I design based on original test length

From: Reliability analysis of the Chinese version of the Functional Assessment of Cancer Therapy – Leukemia (FACT-Leu) scale based on multivariate generalizability theory

Index PWB (n i  = 7) SWB (n i  = 7) EWB (n i  = 6) FWB (n i  = 7) LEUS (n i  = 17) Overall scalea (n i  = 44)
σ 2 P 0.642 0.343 0.491 0.679 0.327 0.323
σ 2 δ 0.095 0.077 0.158 0.125 0.056 0.019
σ 2 Δ 0.114 0.086 0.197 0.146 0.084 0.025
\( {\sigma^2}_{X_{PI}} \) 0.026 0.012 0.045 0.029 0.032 0.009
G 0.871 0.816 0.756 0.845 0.854 0.945
Ф 0.849 0.800 0.714 0.823 0.796 0.928
  1. σ 2 P Universe score variance, σ 2 δ Relative error variance, σ 2 Δ Absolute error variance, \( {\sigma^2}_{X_{PI}} \) Error variance for mean, G generalizability coefficient, Ф index of dependability
  2. a For the overall scale, all indexes are the corresponding composite values