The congruence coefficient is an indicator of the similarity between the factor loadings for the Japanese sample and that for the UK sample.
Although the factor analysis returned two components with a high value of KMO and a high-congruence coefficient, most factor solutions did not result in a simple factor solution (a single high loading for each item on only one factor).
A similar factor structure was found between both samples, with Tucker's congruence coefficient being 0.98 for the first factor and 0.96 for the second factor.
We used the congruence coefficient (rc) to calculate the changes in factor structures under different situations.
Standard interpretation of the congruence coefficient suggests that 0.90 indicates acceptable fit.
Also, the factor congruence coefficient indicated satisfactory factor agreement between the PSS and the PSS-J.
In addition, the factor congruence coefficient indicated satisfactory factor agreement between the original and the Taiwanese version.
In order to assess the factorial equivalence between the two populations, the factor congruence coefficient [ 19] was calculated, which measures the degree of similarity between factor structures obtained in two independent samples.
The four-factor solution was validated and an identical factor solution was obtained with high congruence coefficients (CC) for each factor: 0.98 (factor I), 0.95 (factor II), 0.92 (factor III) and 0.87 (factor IV).
The similarity values of all 20 inputted total ion chromatograms (TICs), relative to the reference chromatogram, can be calculated by correlation and congruence coefficients with median or averaged data [14, 15].
