Table 1.
Percentage of Actigraphy Noncompliance by Cognitive Function Status
| Normal | MCI | Dementia | Chi-Square Test | |
|---|---|---|---|---|
| 1. No consent | 20% | 18% | 22% | p = .263 |
| Sample size | 614 | 336 | 167 | |
| 2. No usable data returned | 12% | 14% | 14% | p = .818 |
| Sample size | 492 | 277 | 128 | |
| 3. Three-day actigraphy | p = .712 | |||
| One day missed | 1% | 2% | 1% | |
| Two days missed | 6% | 5% | 6% | |
| Sample size | 428 | 242 | 110 | |
| 4. Ever taken device off-wrist | 1% | 1% | 4% | p = .152 |
| Sample size | 428 | 242 | 110 | |
| 5. Bedtime event markers | p = .000 | |||
| One missed | 26% | 27% | 22% | |
| Two missed | 8% | 9% | 12% | |
| Three missed | 8% | 11% | 25% | |
| Sample size | 428 | 242 | 110 | |
| 6. Wake-up event markers | p = .000 | |||
| One missed | 21% | 19% | 25% | |
| Two missed | 6% | 9% | 11% | |
| Three missed | 5% | 12% | 21% | |
| Sample size | 428 | 242 | 110 |
Note: MCI = mild cognitive impairment. Total sample sizes varied by noncompliance measures.