Research on Relationships among Different Disease Types of Cement Concrete Pavement Based on Structural Equation Model

Table 5

Model fit measures for the original and modified SEM models.

Measures	Fit index	Acceptable level	Original model	Modified model
Absolute fit measures	Normed chi-square ()	1<  <3 reflects a good model fit	2.863	2.516
	Goodness-of-fit (GFI)	GFI >0.90 reflects a good model fit	0.882	0.913
	Root-mean-square error of approximation (RMSEA)	RMSEA <0.08 reflects a good model fit	0.068	0.065
Incremental fit measures	Comparative fit index (CFI)	CFI >0.90 reflects a good model fit	0.923	0.927
	Normed fit index (NFI)	NFI >0.80 reflects a good model fit	0.806	0.831
Parsimonious fit measures	Parsimony goodness-of-fit index (PGFI)	PGFI >0.50 reflects a good model fit	0.62	0.69