alexa Screening for Chlamydia trachomatis in women 15 to 29 years of age: a cost-effectiveness analysis.
Immunology

Immunology

Journal of Vaccines & Vaccination

Author(s): Hu D, Hook EW rd, Goldie SJ

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Abstract BACKGROUND: Clinical guidelines have traditionally advised annual Chlamydia trachomatis screening for women younger than 25 years of age. OBJECTIVE: To assess the cost-effectiveness of recently proposed strategies for chlamydia screening. DESIGN: State transition simulation model; cost-effectiveness analysis. DATA SOURCES: Published literature. TARGET POPULATION: Sexually active U.S. women 15 to 29 years of age. TIME HORIZON: Lifetime. PERSPECTIVE: Modified societal. INTERVENTIONS: Four strategies targeted to 3 specific age groups (15 to 19 years, 15 to 24 years, and 15 to 29 years): 1) no screening, 2) annual screening for all women, 3) annual screening followed by 1 repeated test within 3 to 6 months after a positive test result, and 4) annual screening followed by selective semiannual screening for women with a history of infection. OUTCOME MEASURES: Clinical events (for example, pelvic inflammatory disease, chronic pelvic pain, ectopic pregnancy, and infertility), lifetime costs, quality-adjusted life expectancy, and incremental cost-effectiveness ratios. RESULTS OF BASE-CASE ANALYSIS: Annual screening in women 15 to 29 years of age followed by semiannual screening for those with a history of infection was the most effective and cost-effective strategy. It consistently had an incremental cost-effectiveness ratio less than 25,000 dollars per quality-adjusted life-year (QALY) compared with the next most effective strategy. When the indirect transmission effects of a 10-year screening program on the probability of infection in uninfected women (that is, per-susceptible rate of infection) were considered, all strategies became more cost-effective. RESULTS OF SENSITIVITY ANALYSIS: Results were sensitive to the annual incidence of chlamydia, probability of persistent infection, screening test costs, and costs of treating long-term complications. Each variable was associated with threshold values beyond which screening became cost-saving. In probabilistic analysis, annual screening in women 15 to 29 years of age followed by semiannual screening for those with a history of infection had an incremental cost-effectiveness ratio less than 50,000 dollars per QALY in 99\% of simulations. LIMITATIONS: Uncertainty about the natural history of chlamydial infection and consideration of only the indirect transmission effects of C. trachomatis screening. CONCLUSIONS: Annual C. trachomatis screening for all women 15 to 29 years of age and selective targeting of those with a history of infection for semiannual screening is very cost-effective compared with other well-accepted clinical interventions.
This article was published in Ann Intern Med and referenced in Journal of Vaccines & Vaccination

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