Table 1.

Baseline Sociodemographic Characteristics of Participants Eligible for Inclusion in a Study of Cross-Sectional Associations of Cytomegalovirus Serostatus and Immunoglobulin G Antibody Response With Cognitive Function, Health and Retirement Study, 2016

			Cytomegalovirus Serostatus
Characteristic	Total (n = 5,617)		Positive (n = 4,113)		Negative (n = 1,504)
	No.	%	No.	Row %	No.	Row %
Age, yearsa	75 (65–107)		75 (65–107)		73 (65–100)
Sex
Female	3,234	57.6	2,495	77.1	739	22.9
Male	2,383	42.4	1,618	67.9	765	32.1
Race/ethnicity
Non-Hispanic White	4,492	80.0	3,085	68.7	1,407	31.3
Non-Hispanic Black	823	14.7	752	91.4	71	8.6
Other	302	5.4	276	91.4	26	8.6
Education
Less than high school	982	17.5	888	90.4	94	9.6
High school	1,938	34.5	1,498	77.3	440	22.7
Some college	1,344	23.9	927	66.0	417	31.0
College or above	1,353	24.1	800	59.1	553	40.9
Marital status
Married/partnered	3,511	63.1	2,463	70.2	1,048	29.8
Separated/divorced	645	11.6	498	77.2	147	22.8
Widowed	1,253	22.5	996	79.5	257	20.5
Never married	159	2.9	116	73.0	43	27.0
Missing data	49	0.9	40	81.6	9	18.4
Smoking status
Never smoker	2,478	44.8	1,870	75.5	608	24.5
Former smoker	2,591	46.9	1,821	70.3	770	29.7
Current smoker	459	8.3	356	77.6	103	22.4
Missing data	89	1.6	66	74.2	23	25.8
Comorbidity indexb	0.33 (0.0)		0.34 (0.0)		0.32 (0.0)
TICS scorec,d	21.9 (0.09)		21.2 (0.11)		23.2 (0.15)

Abbreviation: TICS, Telephone Interview for Cognitive Status.

^a Values are expressed as mean (range).

^b Values are expressed as mean (standard error).

^c Values are expressed as median (standard error).

^d Possible scores on the TICS range from 0 to 35.