Table 1.

Demographic, sleep and cortisol characteristics

	N	% or Mean (STD)	Range
Demographic variables
Age	207	74.0 (7.1)	60.1-93.3
Patient Type
% Bereaved	35	16.9%
% Caregiver	50	24.1%
% Insomnia	68	32.9%
% Healthy Controls	54	26.1%
%Female	133	64.3%
%Caucasian	195	94.2%
BMI	198	26.6 (4.1)	17.6-40.3
Hamilton Rating Scale-25 item	182	7.0 (5.2)	0-25
Pittsburgh Sleep Quality Index	180	6.6 (4.0)	1-16
Perceived Stress Scale- 4 item	180	3.3 (2.8)	0-11
Medications
Antihistamines	22	10.6%
Cardiac	77	37.2%
Antilipemics	86	41.6%
Hypotensive agents	45	21.7%
Analgesics	147	71.0%
Benzodiazepines	18	8.7%
Antidepressants	21	10.1%
Gastrointestinal	72	34.8%
Hormones	61	29.5%
Vitamins	165	79.7%
Diuretics	38	18.4%
Sleep Variables
Apnea-hypopnea Index (#/hr)	205	15.2 (15.7)	0-81.7
Periodic Limb Movement Index (#/hr)	203	5.0 (5.3)	0-27.1
Total Sleep Duration (PSG)	207	429.0 (73.0)	242-622
Sleep Latency (PSG)	207	32.0 (35.9)	0.3-234
Sleep Efficiency (PSG)	207	72.5 (12.9)	28.8-96.4
Final Wake Time (PSG)	207	6:26 (1:11)	2:40 - 10:54
Final Wake Time (Self-report)	194	6:22 (1:18)	1:00 - 10:30
Cortisol (Awakening Response Variables)
Waking Cortisol Sample Time	207	6:51 (1:02)	4:35-11:00
Waking + 30 Cortisol Sample Time	207	7:27 (1:03)	5:01-11:30
Difference between PSG and Self- report wake time (minutes)	194	−3.3 (53.1)	−297.3 to 225.7
Difference between PSG wake time and first cortisol sample (minutes)	207	24.8 (32.2)	−44 to 228.7
Difference between self-report wake time and first cortisol sample (minutes)	194	28.3 (49.2)	−44 to 315.3
Mean cortisol (nmol/L) (wake up)	207	16.7 (11.9)	1.6-92.9
Mean cortisol (nmol.L) (wake +30)	207	24.6 (15.5)	1.3-140
CAR	207	7.9 (11.1)	−16.6 to 51.6