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Table 1 The sequential process to assess longitudinal invariance

From: Validation of the Italian version of the abbreviated expanded prostate Cancer index composite (EPIC-26) in men with prostate Cancer

Model Title Description
A Configural model The factor structure is the same across waves
B Metric model A + all factor loadings are constrained to be equivalent across waves
C Scalar model B + all item intercepts are constrained to be equivalent across waves
D Residual variances model C + all residual variances of items are constrained to be equivalent across waves
E Factor variances model D + all latent factor variances are constrained to be equivalent across waves
F Factor covariances model E + all covariances among latent factors are constrained to be equivalent across waves
G Factor means model F + all latent factor means are constrained to be equivalent across waves