Table 1 Characteristics of the respondents
|  | All participants (N = 1361) |  |
|---|---|---|
Demographic factors | n/N | % |
Age | Â | Â |
 18–24 years  25–30 years  31–35 years  36–40 years  40 + years | 50/1361 532/1361 576/1361 178/1361 25/1361 | 3.7 39.1 42.3 13.1 1.8 |
Education | Â | Â |
 Low  Intermediate  High | 57/1361 395/1361 909/1361 | 4.2 29.0 66.8 |
Country of birth | Â | Â |
 Dutch  Other | 1286/1361 75/1361 | 94.5 5.5 |
Personal factors | Â | Â |
Pertussis vaccination | Â | Â |
 Yes  No | 1294/1361 67/1361 | 95.1 4.9 |