Table 2.
Sleep properties of older Americans, aged 62-90, participating in the NSHAP study, 2010-11 (N=739), with survey weights applied.
| All participants (N=739) | Men (N=348) | Women (N=391) | P-value for gender differencea | |
|---|---|---|---|---|
| Total sleep time (hrs) (Mean (SE)) | 7.21 (0.055) | 7.03 (0.073) | 7.38 (0.078) | 0.003 |
| Wake after sleep onset (minutes) (Mean (SE)) | 38.7 (1.2) | 38.5 (1.4) | 38.8 (1.4) | 0.824 |
| Time in bed (hours) (N=600) (Mean (SE)) | 8.4 (0.07) | 8.3 (0.07) | 8.5 (0.099) | 0.018 |
| Sleep percentage (%) (Mean (SE)) | 82.4 (0.53) | 82.6 (0.72) | 82.2 (0.75) | 0.69 |
| Fragmentation (%, (Mean (SE)) | 14.4 (0.33) | 15.0 (0.44) | 13.9 (0.35) | 0.008 |
| Short sleepers (≤5.7 hours) Proportion (SE)) | 0.10 (0.01) | 0.12 (0.02) | 0.08 (0.02) | 0.04 |
| Long sleepers (≥8.7 hours) (Proportion (SE)) | 0.10 (0.02) | 0.07 (0.01) | 0.13 (0.02) |
a
Gender differences tested with t-tests and chi-square tests.