Table 4.
Age- and head-size corrected regional brain volumes (mean, sd)
| Volumes (cc) | HIV (n = 42) | PD (n = 41) | CTRL (n = 37) | Kruskal–Wallis test | Cohen’s d |
|---|---|---|---|---|---|
| Frontal | |||||
| Total |
131.4 (9.7) |
135.0 (7.9) |
136.1 (5.8) |
H(2) = 4.93, p =0 .085 | 0.321 |
| Precentral |
15.2 (2.1) |
15.8 (2.0) |
16.0 (1.8) |
H(2) = 2.20, p = 0.332 | 0.084 |
| Superior |
17.7 (1.7) |
17.7 (1.3) |
18.2 (1.8) |
H(2) = 2.96, p = 0.227 | 0.182 |
| Orbital |
23.8 (1.9) |
24.0 (2.0) |
24.3 (1.7) |
H(2) = 1.52, p = 0.467 | 0.128 |
| Middle |
22.1 (2.9) |
23.4 (2.5) |
23.3 (2.5) |
H(2) = 3.75, p = 0.153 | 0.247 |
| Inferior |
21.6 (1.9) |
22.2 (2.1) |
22.3 (1.4) |
H(2) = 2.77, p = 0.250 | 0.163 |
| Supplemental motor |
10.1 (1.6) |
9.9 (1.3) |
10.2 (1.2) |
H(2) = 0.97, p = 0.615 | 0.188 |
| Medial |
21.3 (2.2) |
21.7 (1.8) |
21.9 (1.5) |
H(2) = 1.41, p = . 0.495 | 0.143 |
| Hippocampus |
8.1 (0.7) |
8.2 (0.7) |
8.1 (0.6) |
H(2) = 0.13, p = 0.950 | 0.255 |
| Thalamus |
10.7 (1.3) |
11.4 (0.7) |
11.0 (0.8) |
H(2) = 9.18, p = 0.010 HIV < PD: Z = 2.98, p = 0.003 |
0.511* 0.693* |
*Denotes significant group difference