Table 2.
Differences in macrostructural sleep parameters between younger and older participants
| Young adults | Older adults | ||||
|---|---|---|---|---|---|
| Mean | SD | Mean | SD | p | |
| TST (min) | 486.92 | 33.01 | 394.23 | 64.91 | <0.001 |
| N1 (min) | 35.24 | 20.84 | 41.21 | 38.67 | 0.50 |
| N1 % | 7.32 | 4.33 | 11.63 | 13.18 | 0.13 |
| N2 (min) | 280.00 | 39.10 | 245.93 | 57.85 | 0.02 |
| N2 % | 57.86 | 7.31 | 62.51 | 10.30 | 0.08 |
| N3 (min) | 67.80 | 26.04 | 23.33 | 31.03 | <0.001 |
| N3 % | 14.07 | 5.42 | 5.69 | 7.39 | <0.001 |
| REM (min) | 103.88 | 30.10 | 83.76 | 43.06 | 0.07 |
| REM (%) | 21.38 | 5.67 | 21.00 | 9.97 | 0.87 |
| WASO (min) | 30.06 | 27.86 | 50.11 | 38.06 | 0.04 |
| Sleep efficiency (%) | 89.62 | 6.11 | 86.31 | 9.28 | 0.15 |
p values from the independent t-tests contrasting the two groups are listed. Characteristics of the young adult group were obtained from a previous study [29].