r²

p value

Model 1^a

0.322

0.074

Model 2^b

0.321

0.043

Model 3^c

0.321

0.023

Model 4^d

0.310

0.014

Model 5^e

0.296

0.008

Model 6^f

0.291

0.004

Model 7^g

0.271

0.002

Model 8^h

0.251

0.001