Table 1:
General characteristics and demographics of the study population. Comparisons for each variable were made between N+ and N-of each subgroup. SD: standard deviation; NAD: no/low AD load; IAD: intermediate AD load; HAD: high AD load. +/−: presence/absence. N: abnormal sleep behaviours.
| NAD | IAD | HAD | |||||
|---|---|---|---|---|---|---|---|
| N− | N+ | N− | N+ | N− | N+ | ||
| Variable | n (%) | n (%) | n (%) | n (%) | n (%) | n (%) | |
| Gender | * | ||||||
| Male | 179 (54.9) | 108 (56.8) | 51 (49) | 56 (63.6) | 294 (53.5) | 221 (62.4) | |
| * | * | ||||||
| Age, median ± SD years | 79±12.6 | 71.5±12.8 | 86±8.5 | 83±9.2 | 80±10.2 | 78±11.0 | |
|
Years of education,
mean ± SD years |
* | ||||||
| 15.1±3.2 | 15±2.8 | 15.6±3.2 | 15.2±3.3 | 15±3.3 | 15.5±3.1 | ||
| Race | |||||||
| White | 308 (95.7) | 182 (96.3) | 102 (99) | 85 (96.6) | 515 (94.3) | 333 (94.6) | |
| Black/African American | 11 (3.4) | 4 (2.1) | 1 (1) | 3 (3.4) | 25 (4.6) | 14 (4) | |
| Asian | 1 (0.3) | 3 (1.6) | 0 | 0 | 6 (1.1) | 5 (1.4) | |
| Others | 2 (0.6) | 0 | 0 | 0 | 0 | 0 | |
| Depression (NPI-Q) | * | * | |||||
| 86 (26.4) | 82 (43.2) | 32 (30.8) | 34 (38.6) | 156 (28.3) | 155 (43.8) | ||
| * | * | * | |||||
| Anxiety (NPI-Q) | 68 (20.9) | 83 (43.7) | 24 (23.1) | 37 (42) | 173 (31.4) | 185 (52.3) | |
*
p ≤ 0.05.