Table 4.
Characteristics of the non-linear increase (expressed as a · e−bX + c) in fintra and tortuosity α, during the first 3 years of life, as estimated using NODDI and WMTI: time constant (in years), intercept (value at age 0) and estimate at age 3 years. The mean values are provided with 95% confidence bounds, assuming normal distributions.
| NODDI | WMTI | ||||||
|---|---|---|---|---|---|---|---|
| Time constant (years) | Intercept (t=0) | Estimate at 3 years | Time constant (years) | Intercept (t=0) | Estimate at 3 years | ||
| fintra | Genu | 1.3 ± 0.3 | 0.19 ± 0.10 | 0.62 ± 0.08 | 1.3 ± 0.4 | 0.23 ± 0.10 | 0.52 ± 0.09 |
| Splenium | 0.8 ± 0.2 | 0.21 ± 0.09 | 0.64 ± 0.06 | 0.7 ± 0.2 | 0.24 ± 0.06 | 0.57 ± 0.04 | |
| PLIC | 0.4 ± 0.1 | 0.33 ± 0.02 | 0.55 ± 0.01 | 0.3 ± 0.1 | 0.23 ± 0.02 | 0.39 ± 0.01 | |
| α | Genu | 1.9 ± 0.6 | 1.2 ± 0.7 | 2.9 ± 0.7 | 1.6 ± 0.7 | 1.8 ± 1.1 | 3.4 ± 1.1 |
| Splenium | 0.8 ± 0.3 | 1.1 ± 0.7 | 3.6 ± 0.5 | 1.5 ± 0.6 | 1.8 ± 1.0 | 3.6 ± 1.1 | |
| PLIC | 0.5 ± 0.2 | 1.4 ± 0.1 | 2.4 ± 0.1 | 0.9 ± 0.4 | 1.6 ± 0.2 | 1.9 ± 0.2 | |