Table 1. Study population characteristics, CMV seroprevalence study, GNHIES98, Germany (n = 6552 participants).

Variables		N	%
Total		6552	100
Age in years	17–29	1166	17.8
	30–39	1450	22.1
	40–49	1226	18.7
	50–59	1270	19.4
	60–69	940	14.4
	70–79	500	7.6
Sex	Male	3172	48.4
	Female	3380	51.6
Country of birth	German	5769	88.0
	Other	606	9.3
	Missing	177	2.7
Smoking status	Never smoking	2907	44.4
	Previous smoking	1395	21.3
	Current smoking	2097	21
	Missing	153	2.3
Region I in Germany	North	1679	25.6
	Middle	3008	45.9
	South	1865	28.5
Region II in Germany	East	2232	34.1
	West	4320	65.9
Education	Low	1121	17.1
	Middle	3668	56
	High	1587	24.2
	Missing	176	2.7
Attended child care	Yes	3224	49.2
	No	3140	47.9
	Missing	188	2.9
No of household members <18 yrs	0	4136	63.1
	> = 1	2233	34.1
	Missing	183	2.8
No of children grown up with	0	926	14.1
	> = 1	5442	83.1
	Missing	184	2.8
CMV serostatus	Negative	2867	43.3
	Positive	3685	56.7