Prediction of Bridge Component Ratings Using Ordinal Logistic Regression Model

Table 3

Significant parameters and statistics with 2012 data.

Model Statistics	Multiple Linear Regression			Ordinal Regression
	Deck	Superstructure	Substructure	Deck	Superstructure	Substructure
Sample Size	2354	2991	2991	2354	2991	2991
Reconstruction; (DF=1)	Significant; (Positive for with record comparing without record)	Significant; (Positive for with record comparing without record)	Significant; (Positive for with record comparing without record)	Significant; (Positive for with record comparing without record)	Significant; (Positive for with record comparing without record)	Significant; (Positive for with record comparing without record)
Bridge Material Type; (DF=2)	Significant	Significant	Significant	Significant	Significant	Significant
District; (DF=8)	Significant	Significant	Significant	Significant	Significant	Significant
ADT	Significant, Negative	Not Significant, Negative	Significant, Negative	Significant, Negative	Significant, Negative	Significant, Negative
Age	Significant,; Negative	Significant,; Negative	Significant,; Negative	Significant,; Negative	Significant,; Negative	Significant,; Negative
Age2	Significant,; Positive	Significant,; Positive	Significant,; Positive	Significant,; Positive	Significant,; Positive	Significant,; Positive

Note: all independent variables are significant at 90% of the confidence.