Fig 4. Scatter plots for the correlations between body mass index (BMI) z-score and psoas muscle area z-score or paraspinal muscle fat.

BMI z-score has positive linear correlations with (A) z-score of PMA (β = 0.289, p < 0.001) and (B) paraspinal muscle fat (β = 0.218, p = 0.016). The dot color means the BMI group as normal with blue, overweight with red, and obese with green.