Table 4.
The Effects of Covariates on HARDI tractography Measurements (AF, UF, CF, Fx, and CP); Univariate General Linear Model
| Measurements | Adjusted R2 | Corrected model | SNHL | Gender | Age |
|---|---|---|---|---|---|
| Volume | |||||
| AF, left | 0.077 | F=0.41, p=0.80 | F=1.16, p=0.29 | F=0.07, p=0.80 | F=0.09, p=0.77 |
| AF, right | 0.080 | F=1.72, p=0.17 | F=3.55, p=0.07 | F=0.06, p=0.82 | F=0.71, p=0.40 |
| UF, left | 0.508 | F=9.52, p=4.8×10−5 | F=32.3, p=3.8×10−6 | F=0.0016, p=0.97 | F=0.29, p=0.59 |
| UF, right | 0.591 | F=12.9, p=3.7×10−6 | F=44.0, p=2.8×10−7 | F=0.31, p=0.58 | F=2.97, p=0.095 |
| CF, left | 0.016 | F=0.87, p=0.49 | F=2.7, p=0.11 | F=0.15, p=0.70 | F=0.64, p=0.43 |
| CF, right | 0.004 | F=0.96, p=0.44 | F=3.0, p=0.09 | F=0.01, p=0.91 | F=0.83, p=0.37 |
| Fx, left | 0.278 | F=4.2, p=8.6×10−3 | F=15.3, p=5.1×10−4 | F=0.068, p=0.80 | F=1.03, p=0.32 |
| Fx, right | 0.210 | F=3.2, p=0.027 | F=9.0, p=5.5×10−3 | F=2.8, p=0.11 | F=0.61, p=0.44 |
| CP | 0.261 | F=3.9, p=0.011 | F=2.9, p=0.10 | F=4.5, p=0.043 | F=9.1, p=5.3×10−3 |
| Lengths | |||||
| AF, left | 0.071 | F=0.45, p=0.77 | F=0.64, p=0.43 | F=4.3×10−3, p=0.95 | F=1.03, p=0.32 |
| AF, right | 0.034 | F=0.73, p=0.58 | F=1.7, p=0.20 | F=0.58, p=0.45 | F=0.13, p=0.72 |
| UF, left | 0.199 | F=3.1, p=0.03 | F=11.1, p=2.4×10−3 | F=0.95, p=0.34 | F=0.22, p=0.64 |
| UF, right | 0.366 | F=5.8, p=1.5×10−3 | F=19.2, p=1.4×10−4 | F=1.16, p=0.29 | F=0.77, p=0.39 |
| CF, left | 0.206 | F=3.1, p=0.029 | F=6.2, p=0.019 | F=0.70, p=0.41 | F=5.3, p=0.03 |
| CF, right | 0.310 | F=4.7, p=4.8×10−3 | F=13.7, p=8.8×10−4 | F=2.7×10−3, p=0.96 | F=1.9, p=0.18 |
| Fx, left | 0.278 | F=4.2, p=8.6×10−3 | F=9.5, p=4.5×10−3 | F=0.51, p=0.48 | F=0.14, p=0.71 |
| Fx, right | 0.016 | F=0.87, p=0.49 | F=0.38, p=0.54 | F=0.18, p=0.67 | F=1.72, p=0.20 |
| CP | 0.158 | F=2.6, p=0.06 | F=2.8, p=0.10 | F=2.1, p=0.15 | F=5.2, p=0.03 |
| FA | |||||
| AF, left | 0.061 | F=1.5, p=0.22 | F=0.02, p=0.88 | F=1.9, p=0.18 | F=3.8, p=0.06 |
| AF, right | 0.000 | F=1.0, p=0.42 | F=0.14, p=0.71 | F=1.2, p=0.28 | F=2.3, p=0.14 |
| UF, left | 0.076 | F=0.42, p=0.79 | F=0.2, p=0.66 | F=1.1, p=0.29 | F=0.24, p=0.63 |
| UF, right | 0.067 | F=0.48, p=0.75 | F=0.1, p=0.75 | F=1.5, p=0.24 | F=0.15, p=0.70 |
| CF, left | 0.082 | F=0.38, p=0.82 | F=0.01, p=0.92 | F=0.17, p=0.68 | F=1.3, p=0.26 |
| CF, right | 0.094 | F=0.29, p=0.88 | F=0.31, p=0.58 | F=0.34, p=0.57 | F=0.46, p=0.50 |
| Fx, left | 0.120 | F=0.11, p=0.98 | F=0.34, p=0.56 | F=2.5×10−3, p=0.96 | F=0.09, p=0.77 |
| Fx, right | 0.026 | F=0.79, p=0.54 | F=2.4, p=0.13 | F=0.18, p=0.67 | F=0.26, p=0.62 |
| CP | 0.020 | F=1.2, p=0.35 | F=2.8, p=0.10 | F=0.30, p=0.59 | F=0.84, p=0.37 |
| ADC | |||||
| AF, left | 0.270 | F=4.1, p=0.01 | F=9.0, p=5.4×10−3 | F=3.6, p=0.068 | F=4.0, p=0.054 |
| AF, right | 0.279 | F=4.2, p=8.4×10−3 | F=10.2, p=3.4×10−3 | F=2.8, p=0.11 | F=4.3, p=0.046 |
| UF, left | 0.256 | F=3.8, p=0.013 | F=10.2, p=3.4×10−3 | F=2.7, p=0.11 | F=2.9, p=0.099 |
| UF, right | 0.284 | F=4.3, p=7.7×10−3 | F=12.8, p=1.3×10−3 | F=2.2, p=0.15 | F=2.5, p=0.12 |
| CF, left | 0.346 | F=5.4, p=2.3×10−3 | F=15.3, p=5.1×10−4 | F=3.4, p=0.074 | F=3.1, p=0.089 |
| CF, right | 0.353 | F=5.5, p=2.0×10−3 | F=16.9, p=2.9×10−4 | F=2.4, p=0.13 | F=3.0, p=0.093 |
| Fx, left | 0.406 | F=6.6, p=6.4×10−3 | F=21.1, p=7.8×10−5 | F=0.22, p=0.65 | F=1.05, p=0.31 |
| Fx, right | 0.423 | F=7.1, p=4.3×10−4 | F=17.1, p=2.8×10−4 | F=2.8, p=0.103 | F=0.025, p=0.87 |
| CP | 0.370 | F=5.8, p=1.4×10−3 | F=15.3, p=5.1×10−4 | F=4.2, p=0.051 | F=3.9, p=0.057 |
Bold numbers indicate values with a statistical significance. General Linear Model (P<0.05) was constructed to evaluate of binary or continuous covariates (gender and age). Statistically significant values from the F-distribution calculation were determined to be 2.70 and 4.18 for the corrected model and each covariate, respectively. Abbreviation; ADC, apparent diffusion coefficient; AF, arcuate fasciculus; CF, cingulum fasciculus; CP, callosal pathway; FA, fractional anisotropy; Fx, fornix; HARDI, High-angular resolution diffusion magnetic resonance imaging; SNHL, Sensorineural hearing loss; UF, uncinate fasciculus