Fig. 2
From: Rethinking ratio-based normalization towards model-based approaches in heart weight analysis
The linear models in the plot are represented by the regression equations displayed on each Panel. These equations describe the relationship between the independent variable (body weight [g] or tibia length [mm]) and the dependent variable (heart weight [mg]) for both female and male groups. The data are stratified by sex (female vs. male) and age group (early adult [EA] vs. late adult [LA]). Panel A: HW with BW in EA (r=0.21) and LA (r=0.26) female populations; Panel B: HW with BW in EA (r=0.21) and LA (r=-0.069) male populations. Panel C: HW with TL in EA (r=0.058) and LA (r=0.055) for females; Panel D: HW with TL in EA (r=0.014) and LA (r=-0.12) for males.
