Bias and 95% limits of agreement for DXA measures of L1L4 and L2L4 fat compared with MRI.

1Geometric mean and 95% CI.
2. Mean bias and 95% CI expressed as ratio of DXA:MRI values. Bias is the difference (DXA minus MRI) between log fat values from the two techniques.
3. P value from paired t test of the difference.
4. Correlation coefficient of the log difference between DXA and MRI against the average of DXA and MRI measures of fat mass (in grams).
5. Significance of correlation coefficient.
6. 95% Limits of agreement (mean difference ± 2SD) expressed as ratio of DXA:MRI values.
7. Median average abdominal fat value (by MRI and DXA) was 2008 g for L1L4 and 1708 g for L2L4.