r²

p value

Model 1^a

0.454

0.006

Model 2^b

0.454

0.003

Model 3^c

0.444

0.001

Model 4^d

0.423

0.001

Model 5^e

0.393

0.001

Model 6^f

0.359

0.001

Model 7^g

0.330

<0.001

Model 8^h

0.311

<0.001