In Chinese men and women, measuring belly fat with QCT scans is closely related to total body fat measured by DXA scans, with the strength of the relationship varying by sex and where the belly scan is taken.

Scientific Claim

Abdominal quantitative computed tomography (QCT) fat percentage measurements are strongly associated with total body fat percentage measured by dual-energy X-ray absorptiometry (DXA) in Chinese adults, with correlation coefficients ranging from 0.76 to 0.93 depending on sex and slice location.

Original Statement

“DXA-derived TBF% closely correlated with QCT abdominal fat percentage (r = 0.89–0.93 in men and 0.76–0.88 in women).”

From study:Assessment of whole-body and regional body fat using abdominal quantitative computed tomography in Chinese women and men

Evidence Quality Assessment

Claim Status

appropriately stated

Study Design Support

Design supports claim

Appropriate Language Strength

association

Can only show association/correlation

Assessment Explanation

The study is observational and demonstrates correlation, so 'associated with' is appropriate. The claim accurately reports the correlation coefficients without implying causation.

Evidence from Studies

Supporting (1)

Assessment of whole-body and regional body fat using abdominal quantitative computed tomography in Chinese women and men

Cross-Sectional Study

Human

2024 Feb 14

Contradicting (0)

No contradicting evidence found

Source Study

Assessment of whole-body and regional body fat using abdominal quantitative computed tomography in Chinese women and men

Score: 54

DOI: 10.1186/s12944-024-02034-y

Similar Assertions

For Chinese men, combining belly fat measurements from a single CT slice at the L1/L2 level with BMI can accurately estimate total body fat, accounting for 83% of the variation seen in DXA scans.

87%

For Chinese women, using belly fat measurements from a CT slice at the L5/S1 level along with body weight can predict total body fat with 81% accuracy compared to DXA scans.

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Using existing CT scans for belly fat analysis with QCT doesn't add any extra radiation, making it a safe way to check body fat without extra scans.

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When testing the belly fat prediction equations in men, the average difference from DXA measurements was small (1.31%), with most predictions falling within a range of -4.08% to 6.71%.

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When measuring belly fat volume, QCT and DXA scans give very similar results in Chinese men and women, with men showing almost perfect agreement and women showing very strong agreement.

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