Table 3 Associations between demographics and GG grades. Mixed models accounted for two thighs per person and were adjusted for BMI, age, sex, and Physical Activity Scale for the Elderly (PASE). Coefficients for continuous predictors (BMI, age) represent change in outcome (GG) per one unit change in the predictor. The coefficient for sex represents the difference in GG between males and females (males are the reference group).

From: MRI-based analysis of thigh intramuscular fat and its associations with age, sex, and BMI using data from the osteoarthritis initiative data

 

BMI (kg/m2)

Age (years)

Sex (males are reference)

Quadriceps

 Coefficient

0.043

0.022

0.164

 95% CI

0.033 0.053

0.017 0.027

0.074 0.253

 p-value

< 0.001

< 0.001

< 0.001

Vastus Medialis

 Coefficient

0.041

0.023

0.214

 95% CI

0.031 0.051

0.018 0.028

0.128 0.300

 p-value

< 0.001

< 0.001

< 0.001

Vastus Lateralis

 Coefficient

0.042

0.023

0.177

 95% CI

0.032 0.052

0.018 0.028

0.090 0.264

 p-value

< 0.001

< 0.001

< 0.001

Vastus Intermedius

 Coefficient

0.045

0.020

0.168

 95% CI

0.035 0.054

0.015 0.025

0.085 0.251

 p-value

< 0.001

< 0.001

< 0.001

Rectus Femoris

 Coefficient

0.046

0.018

0.088

 95% CI

0.037 0.055

0.014 0.023

0.005 0.170

 p-value

< 0.001

< 0.001

0.037

Hamstrings

 Coefficient

0.049

0.020

0.075

 95% CI

0.040 0.059

0.015 0.025

-0.011 0.160

 p-value

< 0.001

< 0.001

0.089

Biceps Femoris

 Coefficient

0.040

0.017

0.130

 95% CI

0.031 0.049

0.012 0.021

0.052 0.209

 p-value

< 0.001

< 0.001

0.001

Semimembranosus

 Coefficient

0.051

0.022

0.088

 95% CI

0.041 0.061

0.017 0.027

0.000 0.176

 p-value

< 0.001

< 0.001

0.049

Semitendinosus

 Coefficient

0.038

0.017

0.172

 95% CI

0.029 0.047

0.012 0.022

0.093 0.252

 p-value

< 0.001

< 0.001

< 0.001

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