Table 3.

Odds ratios for environmental variables from best-fitting logistic regression models in the three study areas*

Study area	Parameters	OR	Lower 95% CI†	Upper 95% CI
Aberdeen	ODE	0.41	0.13	1.31
	Grass/hay	2.81	1.24	6.36
	Emergent wetland	1.74	1.12	2.71
Sioux Falls	Urban	0.24	0.12	0.49
	Ponding frequency > 75%	1.94	1.21	3.13
Rapid City	Cropland	3.86	0.79	18.88
	Forest	5.12	1.40	18.71
	DEM (100 meters)	0.58	0.45	0.76
	Ponding frequency > 75%	1.50	1.01	2.25

^*OR = odds ratio; CI = confidence interval; ODE = open developed space; DEM = digital elevation model.

^†Statistical significance was achieved if the 95% CI did not overlap the value 1.