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Couple-Years of Protection Indicator: New Global Guidance for Updating Existing Methods and Adding New Methods.
Elena Lebetkin1, Markus J Steiner2, Emily Sonneveldt3
1FHI 360, Durham, NC, USA. elebetkin@fhi360.org.
Global Health, Science and Practice
|April 8, 2024
Summary
New conversion factors for contraceptive methods improve family planning program evaluation. This update provides essential data for four key methods, ensuring accurate monitoring of contraceptive protection.
Area of Science:
- Reproductive Health
- Public Health
- Family Planning Program Evaluation
Background:
- Couple-years of protection (CYP) is a key indicator for monitoring family planning (FP) program performance.
- Previous CYP calculation updates occurred in 2000 and 2011, with evolving contraceptive methods necessitating further revisions.
- Four modern contraceptive methods, including Levoplant implant, progestin-only pills (POPs), Caya diaphragm, and hormonal intrauterine devices, required new CYP conversion factors since the 2011 update.
Purpose of the Study:
- To determine updated Couple-years of protection (CYP) conversion factors for four specific contraceptive methods.
- To ensure accurate performance monitoring and evaluation of family planning programs utilizing these modern contraceptive methods.
Main Methods:
- Conducted comprehensive literature reviews of published and gray literature.
- Consulted with subject matter experts to gather updated data on contraceptive continuation rates, efficacy duration, and effectiveness.
- Calculated new CYP conversion factors using established methodologies and data for similar methods where applicable.
Main Results:
- Assigned new CYP conversion factors for Levoplant implants (2.5 CYP per implant).
- Established new CYP conversion factors for progestin-only pills (POPs) (0.0833 CYP per pack, equivalent to 12 cycles per CYP).
- Determined new CYP conversion factors for the Caya diaphragm (1 CYP per device) and hormonal intrauterine devices (4.8 CYP per device).
Conclusions:
- Couple-years of protection (CYP) remains a vital indicator for family planning programs.
- The development of new contraceptive methods and emerging evidence necessitate regular updates to CYP conversion factors.
- A standardized process for updating and documenting future CYP revisions is recommended for consistency and accuracy.
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