Table 1.

Baseline Characteristics of the Samples

	WLS		MIDUS		HRS		MIDJA
Variables	M/%	SD	M/%	SD	M/%	SD	M/%	SD
Age (Years)	53.20	0.62	56.17	12.31	69.70	9.65	54.13	14.00
Sex (% women)	54%	–	56%	–	59%	–	51%	–
Race (% White)	100%	–	94%	–	86%	–	0%	–
Education	13.71	2.31	7.30	2.53	12.89	2.93	4.48	2.08
Diabetes (% yes)	4%	–	10%	–	22%	–	7%	–
High Blood pressure (% yes)	21%	–	30%	–	62%	–	19%	–
Lung/respiratory disease (% yes)	6%	–	3%	–	12%	–	7%	–
Stroke (% yes)	–		1%		7%		1%
Cancer (% yes)	2%		14%		17%		–
Heart disease/trouble (% yes)	5%		18%		27%		–
Emotional/psychiatric disorders/problems (% yes)	–		18%		17%		9%
Arthritis (% yes)	23%		26%		65%		10%
Baseline Sleep qualitya	1.23	1.75	1.79	1.44	1.92	1.35	2.24	1.60
Baseline Neuroticisma	3.20	0.98	2.06	0.62	2.01	0.61	2.10	0.56
Baseline Extraversiona	3.84	0.89	3.10	0.57	3.18	0.56	2.43	0.68
Baseline Opennessa	3.64	0.80	2.90	0.53	2.92	0.56	2.19	0.61
Baseline Agreeablenessa	4.75	0.74	3.45	0.50	3.53	0.48	2.63	0.63
Baseline Conscientiousnessa	4.87	0.68	3.39	0.46	3.37	0.49	2.60	0.55
Follow-up Sleep qualityb	1.63	1.84	1.83	1.45	2.03	1.37	2.28	1.60
Follow-up Neuroticismc	3.01	0.91	2.05	0.62	1.96	0.60	2.05	0.52
Follow-up Extraversionc	3.79	0.87	3.08	0.57	3.16	0.57	2.39	0.66
Follow-up Opennessc	3.58	0.77	2.88	0.54	2.90	0.57	2.14	0.59
Follow-up Agreeablenessc	4.80	0.71	3.43	0.49	3.51	0.50	2.60	0.61
Follow-up Conscientiousnessc	4.81	0.69	3.40	0.46	3.37	0.49	2.59	0.51

Note.

^aWLS: N= 6513; MIDUS: N= 3790; HRS: N= 11422; MIDJA: N= 1003

^bWLS: N= 5287; MIDUS: N= 2433; HRS: N= 8965; MIDJA: N= 637

^cWLS: N= 5387; MIDUS: N= 2444; HRS: N= 7403; MIDJA: N= 640

See method section for differences in the assessment and coding of sleep quality, personality, and education in each sample.