Comparison of plasma etonogestrel concentrations sampled from the contralateral-to-implant and ipsilateral-to-implant arms of contraceptive implant users
Contraception(2020)
摘要
Objective: To compare plasma etonogestrel concentrations sampled from the contralateral- versus ipsilateral-to-implant arm. Study design: Sub-analysis of a cross-sectional study in Botswana in 33 participants who provided contralateral and ipsilateral blood samples. Results: Plasma etonogestrel concentrations in contralateral and ipsilateral specimens were highly correlated (correlation coefficient = 0.99; p < 0.0001). Bland-Altman analysis of agreement showed that etonogestrel levels were on average 5.9 pg/mL higher (2.1%) in ipsilateral compared to contralateral specimens (95% confidence interval: -4.1, 15.9 pg/mL). Conclusions: We found no meaningful differences in plasma etonogestrel concentrations between samples taken from the contralateral- versus ipsilateral-to-implant arm. (C) 2020 Elsevier Inc. All rights reserved.
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关键词
Contraceptive implant,Etonogestrel,Pharmacokinetics,Ipsilateral arm,Contralateral arm
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