Table 5 Change in IDPs between the first and second imaging visits. Values are reported as mean and standard deviation. An asterisk (*) indicates the p-value is below the significance threshold adjusted for multiple comparisons. ASAT: abdominal subcutaneous adipsose tissue; Conc: concentration; CSA: cross-sectional area; PDFF: proton density fat fraction; VAT: visceral adipose tissue.

From: Precision MRI phenotyping enables detection of small changes in body composition for longitudinal cohorts

 

Women

Men

 

N

Difference

%-diff

p-value

N

Difference

%-diff

p-value

Liver Volume (ml)

1462

\(-4.05 \pm 101.98\)

\(-0.11 \pm 7.50\)

0.0228

1453

\(-14.45 \pm 136.47\)

\(-0.64 \pm 8.59\)

\(1.1\times 10^{-05}\)*

Lungs Volume (ml)

1462

\(-12.34 \pm 257.82\)

\(0.21 \pm 11.01\)

0.3546

1452

\(-12.61 \pm 395.84\)

\(0.46 \pm 12.66\)

0.9522

Pancreas Volume (ml)

1364

\(-1.14 \pm 10.12\)

\(-0.47 \pm 19.41\)

\(3.1\times 10^{-06}\)*

1352

\(-1.26 \pm 9.48\)

\(-0.56 \pm 18.15\)

\(2.1\times 10^{-09}\)*

Left Kidney Volume (ml)

1462

\(-0.85 \pm 11.59\)

\(-0.16 \pm 10.92\)

0.00084

1450

\(-2.47 \pm 11.49\)

\(-1.37 \pm 8.94\)

\(4.8\times 10^{-18}\)*

Right Kidney Volume (ml)

1461

\(-0.70 \pm 10.48\)

\(-0.23 \pm 8.42\)

0.0046

1451

\(-1.75 \pm 11.55\)

\(-0.97 \pm 7.79\)

\(7.5\times 10^{-11}\)*

Spleen Volume (ml)

1459

\(-2.60 \pm 18.39\)

\(-1.03 \pm 12.92\)

\(9.1\times 10^{-12}\)*

1450

\(-2.83 \pm 23.71\)

\(-1.01 \pm 11.92\)

\(8.1\times 10^{-10}\)*

ASAT Volume (ml)

1462

\(39.66 \pm 1,391.39\)

\(1.57 \pm 15.60\)

0.0116

1453

\(32.80 \pm 1,113.74\)

\(2.30 \pm 20.93\)

0.0038

VAT Volume (ml)

1462

\(71.24 \pm 467.64\)

\(5.09 \pm 23.50\)

\(9\times 10^{-17}\)*

1455

\(65.20 \pm 837.55\)

\(3.06 \pm 20.40\)

\(1.6\times 10^{-08}\)*

Total Thigh Subcutaneous Fat (ml)

1462

\(-35.86 \pm 991.81\)

\(0.06 \pm 10.48\)

0.3256

1453

\(38.67 \pm 748.45\)

\(1.47 \pm 12.96\)

0.00036

Total Thigh Internal Fat Volume (ml)

1462

\(7.94 \pm 63.35\)

\(1.47 \pm 9.77\)

\(1.5\times 10^{-08}\)*

1453

\(38.98 \pm 100.75\)

\(6.38 \pm 15.17\)

\(8.4\times 10^{-51}\)*

Total Muscle Volume (ml)

1462

\(-139.34 \pm 488.70\)

\(-0.87 \pm 3.19\)

\(9.4\times 10^{-26}\)*

1453

\(-421.40 \pm 738.52\)

\(-1.83 \pm 3.23\)

\(2.4\times 10^{-94}\)*

Total Iliopsoas Muscle Volume (ml)

1460

\(-7.56 \pm 19.24\)

\(-1.46 \pm 3.90\)

\(1.2\times 10^{-50}\)*

1449

\(-16.76 \pm 30.67\)

\(-2.13 \pm 3.95\)

\(6.7\times 10^{-85}\)*

Total Paraspinal Muscle CSA (\(\text {mm}^2\))

1451

\(-28.19 \pm 184.42\)

\(-0.79 \pm 19.96\)

\(2.9\times 10^{-12}\)*

1446

\(-57.85 \pm 249.19\)

\(-2.55 \pm 17.08\)

\(1.4\times 10^{-23}\)*

Total Thigh Muscle Volume (ml)

1462

\(-96.60 \pm 237.07\)

\(-1.37 \pm 3.42\)

\(2.2\times 10^{-55}\)*

1453

\(-155.39 \pm 404.74\)

\(-1.46 \pm 3.96\)

\(1.4\times 10^{-53}\)*

Heart Volume (ml)

1462

\(-0.51 \pm 33.09\)

\(0.02 \pm 7.81\)

0.5244

1452

\(2.01 \pm 46.75\)

\(0.63 \pm 8.12\)

0.2002

Superior Vena Cava CSA (\(\text {mm}^2\))

1344

\(3.67 \pm 111.12\)

\(3.20 \pm 27.13\)

0.3078

1345

\(-4.01 \pm 116.44\)

\(1.69 \pm 25.39\)

0.237

Descending Suprarenal Aorta CSA (\(\text {mm}^2\))

1432

\(8.44 \pm 64.75\)

\(2.12 \pm 11.79\)

\(1.4\times 10^{-08}\)*

1435

\(10.34 \pm 76.36\)

\(2.09 \pm 11.23\)

\(2.8\times 10^{-09}\)*

Descending Thoracic Aorta CSA (\(\text {mm}^2\))

1433

\(13.97 \pm 58.24\)

\(2.99 \pm 11.01\)

\(5.2\times 10^{-21}\)*

1435

\(19.20 \pm 72.00\)

\(3.38 \pm 11.16\)

\(5.6\times 10^{-29}\)*

Aortic Arch CSA (\(\text {mm}^2\))

1363

\(8.82 \pm 199.84\)

\(4.11 \pm 25.53\)

0.098

1262

\(23.36 \pm 215.03\)

\(5.13 \pm 24.54\)

\(9.9\times 10^{-05}\)*

Descending Infrarenal Aorta CSA (\(\text {mm}^2\))

1410

\(4.03 \pm 63.42\)

\(2.57 \pm 17.92\)

0.0062

1421

\(6.08 \pm 64.13\)

\(2.90 \pm 16.64\)

\(1.3\times 10^{-05}\)*

Median Liver Iron Conc (mg/g)

1453

\(0.0043 \pm 0.21\)

\(1.88 \pm 21.21\)

0.986

1449

\(0.02 \pm 0.21\)

\(2.53 \pm 17.74\)

0.00017*

Median Pancreas Iron Conc (mg/g)

1241

\(-0.0064 \pm 0.12\)

\(0.31 \pm 15.23\)

0.0551

1254

\(0.0036 \pm 0.09\)

\(1.07 \pm 12.71\)

0.8447

Median Paraspinal Muscle Iron Conc (mg/g)

1451

\(-0.0086 \pm 0.15\)

\(-0.06 \pm 11.51\)

0.0357

1446

\(-0.0032 \pm 0.12\)

\(0.12 \pm 9.13\)

0.2612

Median Spleen Iron Conc (mg/g)

1356

\(0.00043 \pm 0.25\)

\(3.50 \pm 28.11\)

0.7197

1301

\(0.02 \pm 0.24\)

\(4.26 \pm 26.61\)

0.0761

Median Liver PDFF (%)

1453

\(0.02 \pm 2.48\)

\(6.56 \pm 42.70\)

0.5416

1449

\(-0.15 \pm 3.11\)

\(4.27 \pm 42.98\)

0.0141

Median Pancreas PDFF (%)

1241

\(-0.03 \pm 4.26\)

\(10.41 \pm 53.94\)

0.3441

1254

\(0.14 \pm 5.59\)

\(11.56 \pm 51.81\)

0.0652

Median Paraspinal Muscle PDFF (%)

1451

\(0.06 \pm 1.82\)

\(6.50 \pm 35.06\)

0.124

1446

\(0.06 \pm 1.34\)

\(4.90 \pm 28.02\)

0.0244