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Table 4 Validation resulta

From: Item reduction and validation of the Chinese version of diabetes quality-of-life measure (DQOL)

 

Confirmatory factor analysis

Spearman correlation coefficient

 

SRMR

CFI

ρ(EQ-5D-3L)

ρ(EQ-VAS)

Short version based on the CTT (32 items)

0.078

0.630

−0.298

−0.288

 Domain 1

  

−0.260

−0.260

 Domain 2

  

−0.069

−0.148

Short version based on the IRT (24 items)

0.078

0.726

−0.288

−0.269

 Domain 1

  

−0.240

−0.242

 Domain 2

  

−0.069

−0.148

Original Chinese DQOL (46 items)

0.077

0.616

−0.276

−0.273

  1. aCalculations based on a total of 1350 observations without missing values on all the five EQ-5D-3 L questions and all the 46 DQOL items
  2. CTT Classical test theory, IRT Item response theory, DQOL Diabetes quality-of-life measure, SRMR Standardized root mean squared residual, CFI Comparative fit index, ρ Spearman’s correlation coefficient, VAS Visual analogue scale