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Table 6 Overall fit indices from the measurement invariance tests

From: The General Health Questionnaire-28 (GHQ-28) as an outcome measurement in a randomized controlled trial in a Norwegian stroke population

Measurement invariance modela

χ2(df)

CFI

TLI

RMSEA

Configural

2143.235 (688) p < 0.001

0.779

0.757

0.086

Metric

2176.377 (716) p < 0.001

0.778

0.766

0.085

Scalar

2262.083 (740) p < 0.001

0.769

0.764

0.085

  1. aCFI comparable fit index, TLI Tucker-Lewis index, RMSEA root mean square error of approximation