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

Table 4

Standardized direct, indirect, and total effects.

	Joint diseases	Surface diseases	Vertical diseases
Joint diseases
Direct effect	na	na	na
Indirect effect	na	na	na
Total effect	na	na	na
Surface diseases
Direct effect	0.138	na	na
Indirect effect	0	na	na
Total effect	0.138	na	na
Vertical diseases
Direct effect	0	0.109	na
Indirect effect	0.015	0	na
Total effect	0.015	0.109	na
Pavement damage
Direct effect	0.174	0.296	0.283
Indirect effect	0.045	0.031	0
Total effect	0.219	0.327	0.283

Note. “na” denotes “not applicable.”