Table 2.
The absolute value of the mean and the estimation standard error for diffusion indices in pre-RT and the percentage changes in the mean, the estimation standard error, and the t-test p-value of the percentage changes in end-RT and 1-month post-RT with respect to pre-RT.
| Pre-RT | End-RT | 1-month post-RT | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Mean | SE of Mean | Mean | SE of Mean | p-value | Mean | SE of Mean | p-value | |||
| Cg_P | FA | 0.395 | 8.72 × 10–3 | %ΔFA | −14.0% | 1.68% | 0.000 | −11.9% | 1.60% | 0.000 |
| MD | 6.60 × 10–6 | 1.17 × 10–7 | %ΔMD | 6.5% | 1.07% | 0.000 | 6.3% | 1.95% | 0.008 | |
| Cg_S | FA | 0.430 | 5.60 × 10–3 | %ΔFA | −5.1% | 1.62% | 0.009 | −3.1% | 1.15% | 0.020 |
| MD | 6.12 × 10–6 | 6.06 × 10–8 | %ΔMD | 1.2% | 0.94% | 0.245 | 0.0% | 0.90% | 0.999 | |
| Cg_A | FA | 0.376 | 1.14 × 10–2 | %ΔFA | −6.1% | 3.03% | 0.068 | −6.6% | 1.90% | 0.005 |
| MD | 6.76 × 10–6 | 1.30 × 10–7 | %ΔMD | 1.1% | 1.88% | 0.565 | 1.7% | 1.06% | 0.128 | |
| Fx | FA | 0.335 | 9.03 × 10–3 | %ΔFA | −12.5% | 1.45% | 0.000 | −12.8% | 2.08% | 0.000 |
| MD | 1.25 × 10–5 | 2.86 × 10–7 | %ΔMD | 4.5% | 1.67% | 0.021 | 2.4% | 1.61% | 0.171 | |
| CC | FA | 0.743 | 7.56 × 10–3 | %ΔFA | −5.2% | 0.76% | 0.000 | −6.4% | 0.60% | 0.000 |
| MD | 6.40 × 10–6 | 7.69 × 10–8 | %ΔMD | 6.8% | 0.92% | 0.000 | 8.5% | 1.11% | 0.000 | |
1
An index with p-value <0.005 is considered significant. Cg: cingulum; CC: corpus callosum; Fx: fornix. The letters P, S, and A denote the posterior, superior, and anterior, respectively.