Table 5.
Differences in brain volumes between groups of short sleepers
| Group 2 – group 1 |
|||
|---|---|---|---|
| Region | Mean volume | Difference mm3 (CI) | % difference (CI) |
| Accumbens | 903 | −7 (−19, 6) | −0.8 (−2.2, 0.7) |
| Amygdala | 3290 | 4 (−25, 34) | 0.1 (−0.8, 1) |
| Brain stem | 21,935 | −181 (−348, −13) | −0.8 (−1.6, −0.1) |
| Caudate | 6757 | −56 (−127, 14) | −0.8 (−1.9, 0.2) |
| Corpus callosum | 3558 | −35 (−77, 7) | −1.0 (−2.2, 0.2) |
| Cerebellum cortex | 111,496 | −704 (−1567, 160) | −0.6 (−1.4, 0.1) |
| Cerebellum WM | 30,979 | −209 (−626, 45) | −0.9 (−2.0, 0.1) |
| Cerebral WM | 475,095 | −105 (−2953, 2744) | −0.0 (−0.6, 0.6) |
| ICV | 1,545,244 | −2674 (−15197, 9849) | −0.2 (−1.0, 0.6) |
| Hippocampus | 8067 | −8 (−68, 51) | −0.1 (−0.8, 0.6) |
| Pallidum | 3994 | −36 (−68, −4) | −0.9 (−1.8,−0.1) |
| Putamen | 9221 | −27 (−109, 54) | −0.3 (−1.2, 0.6) |
| Thalamus | 13,718 | −75 (−163, 13) | −0.6 (−1.2, 0.1) |
| TGV | 662,557 | −1799 (−4678, 1081) | −0.3 (−0.7, 0.2) |
| Ventricles | 31,887 | 116 (−1039, 1270) | 0.4 (−3.3, 4.0) |
“Group 2: Short sleep and sleep problems/sleepiness” was compared with “group 1: Short sleep and no sleep problems/sleepiness.” Negative estimates represent smaller volumes in group 2.