Table 3 Developed SM mass prediction models.

From: Total and regional appendicular skeletal muscle mass prediction from dual-energy X-ray absorptiometry body composition models

Dependent Variable

Model

Equation

Slope 95% CI

Intercept 95% CI

Validation (n = 95)

RMSE (kg)

R2

Total SM

Development (n = 380)

1.12 × ALM – 0.67

1.08, 1.15

−1.51, 0.18

1.74

0.93

Final (n = 475)

1.12 × ALM – 0.63

1.08, 1.15

−1.45, 0.19

–

–

Leg SM

Development (n = 380)

0.78 × leg lean – 1.16

0.75, 0.81

−1.63, −0.68

0.95

0.91

Final (n = 475)

0.78 × leg lean – 1.07

0.75, 0.80

−1.50, −0.64

–

–

Arm SM

Development (n = 380)

0.58 × arm lean + 0.15

0.56, 0.60

0.03, 0.26

0.41

0.88

Final (n = 475)

0.58 × arm lean + 0.15

0.56, 0.60

0.04, 0.26

–

–

  1. ALM and lean mass units are in kg.
  2. ALM appendicular lean mass, RMSE root mean square error, SM skeletal muscle.
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