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. 2011 Jan 3;11:2. doi: 10.1186/1471-2458-11-2

Table 1.

Demographic characteristics of respondents, survey 1, 2 and 3

Characteristics Survey 1 Survey 2 Survey 3
follow-up
Data Statistics NL
30 April-4 May 15-19 June 11-20 August 1-1-2009
(n = 456) (n = 478) (n = 934)
Sex
 Male 52% 52% 52% 50%
 Female 48% 49% 48% 51%
Age
 18-29 years 13% 12% 12% 18%
 30-49 years 33% 40% 36% 37%
 Above 50 years 55% 49% 52% 44%
Ethnicity
 Dutch 90% 92% 92% 80%
 Non-dutch 10% 8% 8% 20%
Education
 Low 40% 39% 38% 33%
 Intermediate 38% 38% 36% 41%
 High 22% 23% 26% 25%
Employment status
 Employed - 61% 57% 76%
 Unemployed/Retired - 40% 43% 24%
Marital status
 Single - 17% 19%
 Married/Cohabitating - 76% 73%
 Divorced/Widowed - 7% 7%
Children < 18 years in household
 Yes - 27% 27%
 No - 73% 73%

'-' data not collected in survey 1.