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Table 5 Allocation of the numbers of items and the G and Ф coefficients for every domain and the overall scale for the two decision options

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

Decision optionb Index PWB SWB EWB FWB LEUS Overall scalea
Decision option A Number of items 5 7 8 5 12 37
G coefficient 0.828 0.812 0.805 0.795 0.805 0.935
Ф coefficient 0.801 0.800 0.769 0.768 0.734 0.916
Decision option B Number of items 5 7 10 6 17 45
G coefficient 0.828 0.812 0.838 0.823 0.854 0.945
Ф coefficient 0.801 0.800 0.806 0.799 0.796 0.928
  1. aFor the overall scale, G coefficient is the composite G coefficient and Ф coefficient is the composite Ф coefficient
  2. bDecision option A: the best allocation of items for the overall scale based on n G i , Decision option B: The best allocation of items for the overall scale based on n ϕ i