## Table 4 |
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Reproducibility of SWCS and AS |
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Participants with AS > 0 for at least one scan (n = 3102) |
Participants with AS > 0 for both scans (n = 2849) |
|||

Variable | Median | Mean | Median | Mean |

% Change in SWCS | 16.87 | 31.23 | 15.30 | 24.71 |

% Change in AS | 18.29 | 41.52 | 16.26 | 27.38 |

% Change in AS minus | 2.02 (1.66-2.40)* | 10.31 (9.05, 11.56)* | 1.05 (0.74-1.51)* | 2.68 (1.99-3.36)* |

% Change in SWCS |

*P<0.001. P-values based on paired *t*-test for mean and Wilcoxon test for median.

Liang * et al.*

Liang * et al.* *BMC Medical Imaging* 2012 **12**:14 doi:10.1186/1471-2342-12-14