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Subject demographics in complete sample and sub-samples.
| Sample | n | Age (y) | # Males | MRD (mm) | Age-MRD Correlation (r value) |
|---|---|---|---|---|---|
| Complete sample | 780 | 15.63 (3.29) | 333 | 0.06 (0.03) | −0.19 |
| Age-motion matched | 729 | 15.91 (3.09) | 306 | 0.06 (0.03) | −0.009 |
| Nearly-motionless | 70 | 16.83 (3.00) | 31 | 0.0265 (0.005) | −0.002 |
