Table 1.

Demographic characteristics of the study participants stratified by gender, HPV seroprevalence study (n = 12,257, sera collected 2003–2006)

	Females		Males		Total		p-value
	Subjects, no.	%a	Subjects, no.	%a	Subjects, no.	%a
Overall	5973	48.7	6284	51.3	12,257	100
Age group (y)							0.248
1–3	616	15.4	649	15.4	1265	15.4
4–6	882	16.7	933	16.6	1815	16.6
7–9	1071	17.0	1146	17.0	2217	17.0
10–11	823	11.4	851	11.4	1674	11.4
12–13	889	12.2	960	12.2	1849	12.2
14–15	858	13.6	963	13.6	1821	13.6
16–17	834	13.8	782	13.8	1616	13.8
Region of residence							0.426
West Germany	3922	83.2	4169	83.2	8091	83.2
East Germany	2051	16.8	2115	16.8	4166	16.8
Urbanity							0.090
Rural	1338	18.3	1382	18.5	2720	18.4
Small city	1561	27.5	1660	27.4	3221	27.5
Medium sized city	1768	29.6	1764	29.1	3532	29.3
Large city	1306	24.6	1478	25.0	2784	24.8
Socioeconomic status of parents							0.612
Low	1569	33.8	1656	34.3	3225	34.1
Middle	2744	43.0	2882	42.0	5626	42.5
High	1523	20.9	1579	21.1	3102	21.0
NA	137	2.4	167	2.6	304	2.5
Migratory background of parents							0.319
None	4680	74.2	4891	74.0	9571	74.1
One parent	403	8.1	431	8.4	834	8.3
Both parents	861	17.3	943	17.3	1804	17.3
NA	29	0.5	19	0.3	48	0.4

NA not available

^aWeighted proportion

^#p-value for difference by gender