Table 4. Evaluated combinations of kernel function, bandwidth type and optimization method for COPD.

Significance levels: * <0.05, ** <0.01. ***<0.001.

Kernel type	Bandwidth	Optimization	AICc	Adjusted R2	Moran`s I
Gaussian	adaptive	AICc	-97.9	0.459	0.156***
Bisquare	adaptive	AICc	-89.3	0.464	0.142***
Exponential	adaptive	AICc	-99.8	0.454	0.185***
Tricube	adaptive	AICc	-87.7	0.460	0.147***
Boxcar	adaptive	AICc	-78.9	0.420	0.186***
Gaussian	fixed	AICc	-113.2	0.543	0.079*
Bisquare	fixed	AICc	-110.1	0.529	0.082**
Exponential	fixed	AICc	-107.6	0.500	0.134***
Tricube	fixed	AICc	-109.1	0.528	0.079*
Boxcar	fixed	AICc	-94.4	0.551	0.049
Gaussian	adaptive	CV	-97.9	0.459	0.157***
Bisquare	adaptive	CV	-74.9	0.522	0.075*
Exponential	adaptive	CV	-99.8	0.454	0.185***
Tricube	adaptive	CV	-79.9	0.509	0.092**
Boxcar	adaptive	CV	-78.9	0.420	0.187***
Gaussian	fixed	CV	-111.5	0.551	0.056
Bisquare	fixed	CV	-107.6	0.506	0.113***
Exponential	fixed	CV	-82.9	0.563	0.061*
Tricube	fixed	CV	-89.6	0.579	0.007
Boxcar	fixed	CV	-75.2	0.400	0.238***