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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