Publications by authors named "Lydia L Pars"

Objective: To evaluate the effectiveness of register based, yearly chlamydia screening.

Design: Controlled trial with randomised stepped wedge implementation in three blocks.

Setting: Three regions of the Netherlands: Amsterdam, Rotterdam, and South Limburg.

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Article Synopsis
  • A systematic internet-based chlamydia screening program in the Netherlands provided automatic test kits to chlamydia-positive participants after 6 months, emphasizing early detection of repeat infections.
  • The study found a retest rate of 66.3% with a chlamydia positivity rate of 8.8% during follow-up, which is notably higher than the initial screening rate of 4.1%.
  • Results indicated higher positivity rates among younger individuals and those with lower education levels, plus specific ethnic backgrounds, highlighting the need for improved case management and risk reduction strategies in these groups.
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Background: Effectiveness of Chlamydia screening programs is determined by an adequate level of participation and the capturing of high-risk groups. This study aimed to evaluate the contribution of automated reminders by letter, email and short message service (SMS) on package request and sample return in an Internet-based Chlamydia screening among people aged 16 to 29 years in the Netherlands.

Methods: Individuals not responding to the invitation letter received a reminder letter after 1 month.

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Background: In the Netherlands, an Internet-based Chlamydia Screening Implementation was initiated in 3 regions, aiming to reduce population prevalence by annual testing and treatment of people aged 16 to 29 years. We studied who was reached in the first screening round by relating participation and chlamydia positivity to sociodemographic and sexual risk factors.

Methods: Data from the 2008/2009 screening round were analyzed (261,025 screening invitations, 41,638 participants).

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Objectives: Systematic screening for Chlamydia trachomatis by individual invitation can be optimised by filtering participants on risk profile, excluding people at no or low risk. The authors investigated this technique in a large-scale chlamydia screening programme in The Netherlands in one rural region where relatively low prevalence was expected (<2%).

Methods: Invitees were alerted by personal letter to log in to http://www.

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Background: The study assessed the acceptability of internet-based Chlamydia screening using home-testing kits among 16- to 29-year-old participants and nonparticipants in the first year of a Chlamydia Screening Implementation program in the Netherlands.

Methods: Questionnaire surveys were administered to randomly selected participants (acceptability survey) and nonparticipants (nonresponse survey) in 3 regions of the Netherlands where screening was offered. Participants received email invitations to an online survey; nonparticipants received postal questionnaires.

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