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Table 2 Fit tests for the modelling of each dimension by a Partial Credit Model (PCM) with the complete sample or with a sample fixed to 500

From: Spatio-temporal Rasch analysis of quality of life outcomes in the French general population. Measurement invariance and group comparisons

  Non parametric IRT analysis Fit of a PCM for the complete sample (n=26388) Fit of a PCM for a fixed, moderate sample size (n=500)
  H Min(Hj) Min(Hjk) Max(CritM) χ2 df P χ2 df p
General Health 0.49* 0.40* 0.31* −5 1320.42 81 <0.0001 39.36 81 0.99
Physical Functioning 0.76* 0.72* 0.66* −21 3895.46 94 <0.0001 103.64 94 0.23
Mental Health 0.57* 0.50* 0.33* −10 2808.10 81 <0.0001 55.95 81 0.98
  1. *: significant at 5%.