Midarm computerized tomography fat, muscle and total areas correlation with nutritional assessment data

Area of Science:

• Nutritional assessment
• Body composition analysis
• Medical imaging

Background:

• Nutritional status is crucial for clinical outcomes in obese, malnourished, and control subjects.
• Accurate body composition measurement is essential for effective nutritional intervention.
• Traditional anthropometry may have limitations in precisely quantifying body compartments.

Purpose of the Study:

• To correlate anthropometric, bioimpedance, and biochemical data with computerized tomography (CT) measurements of midarm areas.
• To evaluate the accuracy of bioimpedance and anthropometry in estimating body fat and fat-free mass compared to CT.
• To assess the correlation of urinary creatinine with muscle mass estimation.

Main Methods:

• Utilized computerized tomography (CT) to quantify total, muscle, and fat midarm areas.
• Employed bioimpedance analysis to estimate total body fat and fat-free mass.
• Collected anthropometric data, including midarm skinfold thickness.
• Quantified daily urinary urea and creatinine levels.

Main Results:

• CT-derived fat area was 29% higher, while total and muscle midarm areas were 4-5% lower than anthropometric estimates.
• Midarm skinfold thickness showed a strong correlation with CT-measured fat midarm area.
• Bioimpedance data for total body fat and fat-free mass correlated significantly with CT midarm measurements.
• Urinary creatinine levels correlated with CT-derived muscle midarm area.

Conclusions:

• Anthropometric methods can lead to significant errors in estimating arm fat and fat-free areas.
• Bioimpedance analysis provides a fair correlation with CT midarm measurements for body composition assessment.
• CT serves as a valuable tool for validating less invasive body composition techniques like bioimpedance.