Quantitative Analysis of Driving Factors of Grassland Degradation: A Case Study in Xilin River Basin, Inner Mongolia

Table 3

Results of BLR analysis for LC succession.

Variable	β	S.E. (β)	Sig.	Exp (β)	95.0% C.I. for Exp(β)
					Lower	Upper
(a) LC succession: during 1985~1998
DVLC-85	0.040	0.003	<0.001	1.041	1.035	1.046
AGI(85–98)	0.013	0.005	0.005	1.013	1.004	1.022
DR85	−0.123	0.021	0.007	0.884	0.801	0.923
ALT	0.006	0.001	<0.001	1.006	1.005	1.008
DS	−0.201	0.027	<0.001	0.818	0.779	0.900
*SLP
*ORI
*NDVI85
*DW
Intercept	−13.830	1.015	<0.001	0.000
Hosmer and Lemeshow Goodness-of-Fit Test: Chi-square =  9.712, Pr  >  Chi-square =  0.286
(b) LC succession: during 1998~2004
DVLC-85	0.047	0.002	<0.001	1.048	1.043	1.052
AGI(98–04)	0.088	.019	<0.001	1.092	1.090	1.095
DR98	−0.098	0.011	<0.001	0.907	0.872	0.974
ALT	0.018	0.001	<0.001	1.018	1.008	1.010
*SLP
*ORI
*NDVI98
*DW
*DS
Intercept	−15.420	0.783	<0.001	0.000
Hosmer and Lemeshow Goodness-of-Fit Test: Chi-square = 11.867, Pr  >  Chi-square = 0.157

𝑛=4000.
Maximum likelihood estimate of the parameter. S.E. (β): estimated standard error of the parameter estimate; Wald χ ²: Wald chi-squared statistic; Sig.: 𝑃 value of the Wald chi-squared statistic; Exp (β): odd ratio.
*variables excluded by the logistic regression model after the run.
C.I.: confidence intervals.
The cut value is 500.