Table 2 Confirmatory factor analysis results.

From: Interactions between perceived stress and microbial-host immune components: two demographically and geographically distinct pregnancy cohorts

 

Df

Chisq

Chisq.diff

Df.diff

p value

Configural

68

61.428

   

Weak

76

99.694

24.187

8

0.002

Weak

76

99.693

   

Strong

84

92.639

−13.648

8

1.000

Strong

84

92.639

   

Strict

94

146.242

41.053

10

<0.001

  1. The CFA established that the two-factor model of PS is not invariant and depends on the cohort. Df degrees of freedom, Chisq chi-square values, Chisq.diff differences between the chi-square values for the two models, Df. diff difference between the degrees of freedom; configural model, latent model with two factors without any constrain; weak model, constraining the loads of each item in each factor to be equal between groups; strong, constraining the loads and the intercepts for each item in each factor to be equal between groups; strict model, constraining the loads, the intercepts and residuals of the latent model for each item in each factor to be equal between groups.
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