Population-based outreach for Chlamydia screening in men: results from a randomized trial

Area of Science:

• Public Health
• Infectious Disease Prevention
• Sexual Health Screening

Background:

• Genital Chlamydia trachomatis (CT) infections are a significant public health concern, particularly among young men.
• Effective screening strategies are crucial for early detection and treatment to prevent complications and transmission.
• Current screening rates in men, especially asymptomatic individuals, often remain suboptimal.

Purpose of the Study:

• To assess the feasibility and effectiveness of population-based outreach methods for improving CT screening among men aged 21-25.
• To compare the efficacy of two different mail-based outreach strategies against standard care.

Main Methods:

• A randomized controlled trial involving 8,820 men aged 21-25.
• Participants were randomized into three groups: letter with urine home sampling kit request, letter with mail-back sampling kit, or usual care.
• Chlamydia trachomatis testing rates were measured over a four-month period post-randomization.

Main Results:

• Both mailed outreach strategies significantly increased CT testing rates compared to usual care (RR 5.6 for kit request, 11.1 for mail-back kit).
• The mail-back sampling kit strategy (Arm 2) demonstrated significantly higher testing rates than the kit request strategy (Arm 1).
• The overall intervention response rate was low at 5.7%, with a CT prevalence of 1.0%-2.6% in returned samples.

Conclusions:

• Population-based mailed outreach strategies can effectively increase CT screening in young men.
• Direct mailing of self-sampling kits appears to be a more effective outreach method than simply requesting a kit.
• Low response rates necessitate careful consideration of these strategies within broader public health priorities for CT control.