Table 1.
Comparison of variables between types of twin zygosity according to age.
| Original | Adjusted by Age | |||||||
|---|---|---|---|---|---|---|---|---|
| Zygosity | MZ | DZ | p-Value | MZ | DZ | p-Value | ||
| n | 40 | 32 | 40 | 32 | ||||
| Gender [n] | male | 20 | 16 | 1 | 20 | 16 | 1 | |
| Age [years] (SD) | 61.10 (8.74) | 63.19 (13.16) | 0.423 | 61.10 (8.74) | 63.19 (13.16) | 0.423 | ||
| Brain Volume [z-score] (95% CI) |
Cerebellum Posterior Lobe | left | −0.20 [−1.90, 0.62] | −0.87 [−1.67, −0.14] | <0.001 | 1.15 [−0.89, 2.65] | 0.81 [−0.58, 1.92] | 0.063 |
| Temporal Lobe | −0.12 [−1.20, 0.81] | −0.55 [−1.15, 0.20] | <0.001 | 1.00 [−0.40, 2.25] | 0.72 [−0.80, 2.03] | 0.065 | ||
| Limbic Lobe | −0.21 [−1.12, 1.26] | −1.21 [−2.23, 0.13] | <0.001 | 1.28 [−0.18, 2.52] | 0.19 [−1.40, 3.21] | <0.001 | ||
| Frontal Lobe | −0.04 [−1.10, 0.71] | −0.77 [−1.68, 0.44] | <0.001 | 1.21 [−0.01, 3.32] | 0.38 [−1.01, 2.56] | <0.001 | ||
| Sub-lobar | 0.04 [−1.43, 0.96] | −1.21 [−2.24, 0.17] | <0.001 | 1.20 [−0.31, 3.09] | 0.22 [−1.53, 3.47] | 0.003 | ||
| Cerebellum Anterior Lobe | −0.07 [−1.14, 1.13] | −0.93 [−2.09, 0.31] | <0.001 | 1.40 [0.05, 2.44] | 0.34 [−1.22, 2.04] | <0.001 | ||
| Occipital Lobe | −0.10 [−1.02, 0.83] | −1.10 [−1.98, 0.36] | <0.001 | 0.97 [−0.31, 2.42] | 0.13 [−1.29, 1.91] | <0.001 | ||
| Frontal-Temporal Space | −0.13 [−1.19, 1.11] | −0.56 [−2.23, 0.92] | 0.015 | 1.87 [−0.40, 4.79] | 0.77 [−0.98, 2.93] | <0.001 | ||
| Parietal Lobe | −0.06 [−1.06, 0.55] | −0.74 [−1.42, 0.59] | <0.001 | 0.87 [0.17, 2.61] | 0.19 [−1.07, 2.32] | <0.001 | ||
| Cerebellum Posterior Lobe | right | −0.19 [−1.70, 0.86] | −0.57 [−1.67, 0.09] | 0.001 | 0.81 [−0.58, 1.92] | 0.81 [−0.58, 1.92] | 0.044 | |
| Temporal Lobe | −0.20 [−1.05, 0.49] | −0.57 [−1.34, 0.25] | <0.001 | 0.72 [−0.80, 2.03] | 0.72 [−0.80, 2.03] | 0.1 | ||
| Limbic Lobe | −0.08 [−1.17, 0.89] | −1.15 [−2.06, 0.06] | <0.001 | 0.19 [−1.40, 3.21] | 0.19 [−1.40, 3.21] | <0.001 | ||
| Frontal Lobe | 0.03 [−0.97, 0.75] | −0.87 [−1.71, 0.44] | <0.001 | 0.38 [−1.01, 2.56] | 0.38 [−1.01, 2.56] | <0.001 | ||
| Sub-lobar | −0.10 [−1.23, 0.68] | −1.30 [−2.31, 0.37] | <0.001 | 0.22 [−1.53, 3.47] | 0.22 [−1.53, 3.47] | 0.002 | ||
| Cerebellum Anterior Lobe | 0.01 [−1.44, 0.80] | −0.80 [−2.09, 0.19] | <0.001 | 0.34 [−1.22, 2.04] | 0.34 [−1.22, 2.04] | <0.001 | ||
| Occipital Lobe | 0.02 [−0.97, 1.28] | −1.05 [−1.58, −0.07] | <0.001 | 0.13 [−1.29, 1.91] | 0.13 [−1.29, 1.91] | <0.001 | ||
| Frontal-Temporal Space | −0.23 [−2.03, 1.50] | −1.01 [−2.49, 0.53] | 0.001 | 0.77 [−0.98, 2.93] | 0.77 [−0.98, 2.93] | 0.017 | ||
| Parietal Lobe | −0.16 [−0.87, 0.75] | −0.76 [−1.58, 0.93] | <0.001 | 0.19 [−1.07, 2.32] | 0.19 [−1.07, 2.32] | <0.001 | ||
Brain volume values represent the z-score of lobular volumes adjusted for age and gender. 95% CIs are indicated in parentheses. Legends: SD standard deviation; CI confidence interval.