Table 1

Characteristics of participants and non-participants in a screening programme for asymptomatic Chlamydia trachomatis infections by means of mailed, home obtained urine specimens

Prevalence of characteristic (%)
CharacteristicNon-participants (n=548†)Participants* (n=3368)
*Participants from practices that supplied information on non-participants.
†Information on two people was not supplied by practices.
‡χ2 test.
Age (years)NS
15–209.68.2
21–2513.616.2
26–3024.526.7
31–3530.226.8
36–4022.222.1
Originp<0.001‡
Dutch60.175.0
Other European4.83.2
Surinam/Antillean11.610.8
Turkish/Moroccan13.85.4
Other9.65.5
Married or cohabitingNS
Yes45.548.3
No54.551.7
Type of health insuranceNS
Government73.172.9
Private26.927.1