Table 4.
Rate of change in T2 values at baseline and over 6 years
| Ethnicity | |||||
|---|---|---|---|---|---|
| African Americans | Caucasian Americans | ||||
| Rate of change at baseline | slope coeff.* | 95% CI | slope coeff.* | 95% CI | p |
| Average of all regions | 0.45 | 0.38–0.51 | 0.35 | 0.29–0.41 | 0.029 |
| LFC | 0.62 | 0.53–0.72 | 0.55 | 0.45–0.65 | 0.238 |
| LT | 0.53 | 0.44–0.62 | 0.42 | 0.34–0.51 | 0.058 |
| MFC | 0.37 | 0.28–0.42 | 0.23 | 0.13–0.33 | 0.025 |
| MT | 0.37 | 0.28–0.45 | 0.26 | 0.18–0.34 | 0.054 |
| P | 0.33 | 0.19–0.47 | 0.32 | 0.18–0.45 | 0.835 |
| Average change rate over 6 years | rate/year* | 95% CI | rate/year* | 95% CI | p |
| Average of all regions | 0.36 | 0.30–0.43 | 0.27 | 0.20–0.33 | 0.039 |
| LFC | 0.51 | 0.41–0.61 | 0.43 | 0.33–0.53 | 0.269 |
| LT | 0.46 | 0.37–0.54 | 0.35 | 0.26–0.43 | 0.067 |
| MFC | 0.29 | 0.20–0.39 | 0.14 | 0.05–0.24 | 0.030 |
| MT | 0.29 | 0.21–0.37 | 0.18 | 0.10–0.26 | 0.061 |
| P | 0.27 | 0.15–0.40 | 0.25 | 0.13–0.38 | 0.821 |
*
Numbers of slope coefficients at baseline and average rate /year are least square means adjusted for multiple measurements per ID and matched pairing between groups pairs using a mixed random effects model. Units are ms/year.