Chlamydia infection
Conditions
Interventions
The Chlamydia Screening Implementation (CSI) is implemented by the Public Health Services in Amsterdam, Rotterdam and South Limburg. STI AIDS Netherlands is coordinating the programme. In collaboratio
2. Invitees: 315,000 people aged 16 to 29 years, obtained from the population register. The intervention is rolled out in a stepped wedge design, in a cluster-randomised order (cluster = town area or
for evaluation purposes, clusters are randomized in three blocks comparable in proportion of clusters with high/medium/low community risk level (estimated by population income levels, proportion non-d
3. One of the three blocks of clusters is the 'control' block, where the intervention is only rolled-out after the second screening invitation has been sent to other blocks
4. All targeted individuals are invited to participate to the screening with a personal letter
5. Invitation letters containing the website address (www.chlamydiatest.nl) and a personal login code are sent by mail. Communication and screening procedures are Internet based. Home sampling kits (u
6. Actual intervention: Chlamydia test
advice and referral letter for treatment (for Chlamydia-positive participants and current partners). Opportunity to notify former partners anonymously through the website (www.chlamydiatest.nl)
7. Fol
Sponsors
Jan van Bergen
STI AIDS Netherlands
Keizersgracht 392
1016 GB AMSTERDAM
Eligibility
Inclusion criteria
Inclusion criteria: All young persons from 16 to 29 years old, registered in the municipal register in Amsterdam, Rotterdam and part of South Limburg (Parkstad, around Heerlen). In Amsterdam and Rotterdam where the population is dense, all sexually active people are encouraged to participate, but in South Limburg where the population is less dense, eligibility for screening depends on the individual’s score on a questionnaire (including e.g. sexual history, residence area, ethnic background, and symptoms) related to the expected Chlamydia risk.
Exclusion criteria
Exclusion criteria: Excluded are persons younger than 16 years or older than 29 years and persons living outside the 3 trial regions. In South Limburg individuals with a low score on the selection questionnaire can not proceed further with participation (i.e. requesting a chlamydia test kit).
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Participation rate and positivity rate, per block of clusters in the three regions, comparing the intervention and control blocks per region, after multiple screening invitations. Estimated population prevalence based on positivity rates and participant profile. | — |
Secondary
| Measure | Time frame |
|---|---|
| Acceptability and reasons for non-response; reinfection rates at 6 months after initial Chlamydia infections. Process indicators, such as time to participation, response after reminders. | — |
Contacts
Public ContactJ.E.A.M. Bergen, van
Soa Aids Nederland Keizersgracht 392
Outcome results
None listed