Table 1.
Sample Characteristics (n = 351)
| n (%) | Range | Mean | SD | |
|---|---|---|---|---|
| Age, years | — | 51–96 | 71.99 | 8.91 |
| Gender, female | 269 (76.6) | — | — | — |
| Education years | 3–22 | 11.52 | 2.88 | |
| CES-D total | 0–37 | 13.00 | 4.22 | |
| LC total | 15–84 | 43.46 | 11.36 | |
| PSS total | 3–43 | 19.35 | 7.21 | |
| MMSE total | 11–30 | 24.78 | 3.08 | |
| MAC-Q total | 7–35 | 15.37 | 6.33 | |
| Difficulty recalling person’s name | 63 (17.9) | |||
| Difficulty recalling telephone numbers/zip codes | 51 (14.5) | |||
| Difficulty recalling location of objects in home/office | 62 (17.7) | |||
| Difficulty recalling facts from reading materials | 47 (13.4) | |||
| Difficulty recalling items intended to be purchased | 49 (14.0) | |||
| Memory worse now compared to past | 86 (24.5) | |||
| PSQI Global Score | 1–18 | 7.17 | 2.94 | |
| C1. Subjective sleep quality | 0–3 | 0.69 | 0.69 | |
| C2. Sleep latency | 0–3 | 0.97 | 0.85 | |
| C3. Sleep duration | 0–3 | 1.13 | 0.93 | |
| C4. Habitual sleep efficiency | 0–3 | 2.43 | 1.09 | |
| C5. Sleep disturbances | 0–3 | 1.07 | 0.52 | |
| C6. Use of sleep medication | 0–3 | 0.29 | 0.83 | |
| C7. Daytime dysfunction | 0–3 | 0.59 | 0.94 | |
| PSQI Category Groups | ||||
| Good Sleepers (Global Score ≤5) | 101 (28.8) | |||
| Bad Sleepers (Global Score >5) | 250 (71.2) |
Note: CES-D = Center for Epidemiological Studies Depression Scale; LC = Locus of Control Scale; PSS = Perceived Stress Scale; MMSE = Mini-Mental State Examination; MAC-Q = Memory Complaints Questionnaire; PSQI = Pittsburgh Sleep Quality Index. C1 is the PSQI Component 1. C2 is the PSQI Component 2. C3 is the PSQI Component 3. C4 is the PSQI Component 4. C5 is the PSQI Component 5. C6 is the PSQI Component 6. C7 is the PSQI Component 7.