Table 1.
Characteristics of the Analysis Subset
| Analysis Subset (n=68) | |
|---|---|
| PSG data: | |
| Total sleep time, min, mean ± SD | 342.8 ± 70.2 |
| Sleep efficiency <70%, N (%) | 18 (26.5) |
| Apnea-hypopnea index , mean ± SD | 15.1 ± 14.6 |
| AHI≥5, N(%) | 50 (73.5) |
| AHI≥15, N(%) | 28 (41.2) |
| Characteristics: | |
| Age, yr, mean ± SD | 81.9 ± 3.8 |
| Body mass index, k/m2, mean ± SD | 29.1 ± 5.4 |
| African American, N (%) | 11 (16.2) |
| Difficulty with one or more IADL, N (%) | 31 (45.6) |
| Depression (GDS≥ 6), N (%) | 10 (14.7) |
| MMSE (range 0-30), mean ± SD | 28.3 ± 1.5 |
| Take walks for exercise, N (%) | 19 (27.9) |
| Self reported health, N (%) | |
| Poor/very poor | 2 (2.9) |
| Fair | 12 (17.7) |
| Good/very good | 54 (79.4) |
| Medical conditions*, N (%) | 11 (68.8) |
| Currently took medication for sleep, N (%) | 7 (10.3) |
| Pittsburgh Sleep Quality Index (range 0-21), mean ± SD | 6.6 ± 3.9 |
| Poor sleep (Pittsburgh Sleep Quality Index>5), N (%) | 36 (52.9) |
*
Medical conditions included stroke, diabetes, dementia, COPD, osteoarthritis, or cancer.
SD = standard deviation, AHI = Apnea-hypopnea index, IADL = independent activities of daily living, GDS = Geriatric Depression Scale, MMSE = the Mini-Mental State Examination, COPD = chronic obstructive pulmonary disease.