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Table 3 Results with respect to the IRT-model assumptions of the DF-PROMIS-UE v2.0 bank

From: Graded response model fit, measurement invariance and (comparative) precision of the Dutch-Flemish PROMIS® Upper Extremity V2.0 item bank in patients with upper extremity disorders

Analyses Outcome Result
IRT assumptions and model fit
 Confirmatory Factor Analysis of one-factor model Chi square 5964.333
df 989
p-value 0.000
Scaled CFI 0.93
Scaled TLI 0.93
Scaled RMSEA (90% CI) 0.099 (0.097–0.101)
Scaled SRMR 0.09
 Exploratory Factor Analysis Eigenvalue first factor 30.1
Eigenvalue second factor 2.8
Ratio 10.7
 Exploratory bi-factor analysis ECV 0.68
Omega-H 0.80
 Local Dependency Residual correlation > 0.17 4 item pairs locally dependent (3.3%)
 Monotonicity Scalability coefficient H 0.63
Scalability coefficients Hi Range 0.55–0.70
  1. Abbreviations in alphabetic order: CFI Comparative Fit Index, ECV Explained Common Variance, RMSEA Root Means Square Error of Approximation, SRMR Standardized root mean residual, TLI Tucker-Lewis Index