Table 3. Cox models examining each sleep disturbance characteristic and incident dementia (N = 2,812).

	Incident dementia				Incident dementia
	Unadjusted models				Fully adjusted modelsa
	HR	p-value	Lower	Upper	HR	p-value	Lower	Upper
Difficulty with Alertness
Never/Rarely	Reference
Some Days	1.32	0.034	1.02	1.71	1.13	0.392	0.83	1.43
Most Days/Every Day	1.20	0.286	0.85	1.71	1.01	0.970	0.69	1.46
Nap Frequency
Never/Rarely	Reference
Some Days	1.22	0.160	0.92	1.61	1.08	0.631	0.76	1.45
Most Days/Every Day	1.21	0.185	0.94	1.58	0.96	0.786	0.71	1.29
Sleep Latency
<15 minutes	Reference
15-30 minutes	1.41	0.017	1.06	1.89	1.22	0.192	0.92	1.67
>30 minutes	1.65	0.002	1.20	2.27	1.45	0.032	1.03	2.03
Sleep Quality
Good/Very Good	Reference
Fair	1.08	0.574	0.82	1.43	1.03	0.828	0.73	1.31
Poor/Very Poor	1.01	0.954	0.65	1.58	1.11	0.644	0.65	1.59
Sleep Duration
7-8 hours	Reference
≤5 hours	1.81	0.011	1.14	2.86	2.04	0.004	1.26	3.33
6-7 hours	0.88	0.250	0.62	1.12	0.86	0.330	0.63	1.17
≥ 9 hours	1.43	0.030	1.04	1.97	0.97	0.857	0.66	1.39
Snoring
Never/Rarely	Reference
Some Nights	1.62	0.024	1.06	2.54	1.52	0.079	0.95	2.44
Most Nights/Every Night	0.70	0.479	0.26	1.88	0.39	0.184	0.09	1.56

Note: bold indicates significance at the p<0.05 level.

^aAdjusted models control for demographic characteristics, including age, marital status, race, education, health conditions, and body weight.