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Table 1 Correlation analysis and stepwise multiple regression analyses with bite force as the dependent variable and head morphological traits as independent variables. All variables were log10 transformed

From: The relationship between bite force, morphology, and diet in southern African agamids

  Pearson correlation analysis Stepwise regression analysis1
r P β P
Bite force
 Head length 0.94 < 0.01   
 Head width 0.92 < 0.01   
 Head height 0.84 0.05   
 Lower jaw length 0.96 < 0.01 0.45 < 0.01
 Jaw out-lever 0.96 < 0.01 0.52 < 0.01
 Snout length 0.90 < 0.01   
 In-lever for jaw opening 0.54 0.74   
 In-lever for jaw closing 0.48 0.89   
  1. r Pearson correlation coefficient, β regression coefficient, P P-value
  2. 1Adjusted R2 (the coefficient of determination) = 0.94