Table 2.
vCG MZ and DZ ICC coefficients of FA, MD and volume in the left and right hemisphere, with standardized additive genetic (A), common environmental (C) and unique environmental (E) variance components of the full ACE model (and 95% CI) with the associated DF, chi-square and P values
| vCG | ICC (MZ) | ICC (DZ) | A | C | E | Best fit model* | χ2 (DF = 6) | P value |
|---|---|---|---|---|---|---|---|---|
| FA (L) | 0.35* (−0.03 to 0.65) | 0.15 (−0.36 to 0.60) | 0.32 (0–0.59) | 0 (0–0) | 0.68 (0.41–1) | E | 1.62 | 0.95 |
| FA (R) | 0.66** (0.37–0.84) | 0.59* (0.10–0.85) | 0 (0–0.74) | 0.63 (0–0.79) | 0.37 (0.21–0.61) | (A + C)E | 5.25 | 0.51 |
| MD (L) | 0.42* (0.05–0.69) | 0.37 (−0.14 to 0.73) | 0.22 (0–0.68) | 0.20 (0–0.60) | 0.58 (0.32–0.91) | (A + C)E | 5.29 | 0.51 |
| MD (R) | 0.63** (0.33–0.81) | 0.62** (0.20–0.85) | 0.01 (0–0.74) | 0.60 (0–0.77) | 0.39 (0.21–0.62) | (A + C)E | 3.41 | 0.76 |
| Vol (L) | 0.57** (0.24–0.78) | 0.01 (−0.49 to 0.52) | 0.49 (0–0.71) | 0 (0–0.59) | 0.51 (0.30–0.82) | (A + C)E | 4.50 | 0.61 |
| Vol (R) | 0.53** (0.17–0.77) | 0.05 (−0.45 to 0.53) | 0.46 (0–0.70) | 0 (0–0.55) | 0.54 (0.31–0.88) | (A + C)E | 4.35 | 0.63 |
vCG, ventral cingulum; L, left; R, right.
*P < 0.05, **P < 0.01, ICC test.