Table 2.

Predictors of Actigraphy Compliance in the National Social Life, Health, and Aging Project, Results From Logistic and Negative Binomial Regressions (Unweighted)

	No Consent	No Usable Data Returned	Number of Days Missed	Ever Off-wrist	Number of Bedtime Markers Missed	Number of Wake-up Markers Missed
	Odds Ratio (95% CI)	Odds Ratio (95% CI)	Incident Rate Ratio (95% CI)	Odds Ratio (95% CI)	Incident Rate Ratio (95% CI)	Incident Rate Ratio (95% CI)
Cognitive status (ref. = normal)
MCI	0.77 (0.53, 1.13)	0.86 (0.53, 1.39)	0.94 (0.44, 1.00)	0.67 (0.13, 3.40)	1.33 (0.95, 1.86)	1.57 (1.07, 2.28)*
Dementia	0.98 (0.63, 1.54)	0.85 (0.45 1.59)	1.17 (0.41 3.31)	2.07 (0.46, 9.36)	1.51 (1.03, 2.21)*	1.89 (1.27, 2.80)**
Sample size	1,117	897	780	780	780	780

Note: CI = confidence interval; MCI= mild cognitive impairment. Results for “no consent”, “no usable data returned”, and “ever off-wrist” were based on logistic regressions and results for the remaining noncompliance measures were based on negative binomial regressions. All regressions controlled for age, gender, race/ethnicity, education, household income, and marital status.

*p < .05. **p < .01. ***p < .001.