Validity of Partner Reports of Recent Condomless Sex.

Background: Prostate-specific antigen (PSA), a biomarker of vaginal semen exposure, is less susceptible to bias than self-reported condom use behaviors. We examined the agreement of self-reported recent condomless sex (RCS) within couples and how these reports related to PSA detection.

Methods: We analyzed data from a study conducted in Vietnam, 2017 to 2020, of 500 different-sex couples using condoms and no other contraceptive method to prevent pregnancy for 6 months.

Prevalence and correlates of very rapid repeat pregnancy: Pregnancy Risk Assessment Monitoring System, United States, 2009-2020.

Background: Most rapid repeat pregnancies, defined as those occurring within 18 months of a previous birth, are unintended. These pregnancies are associated with later initiation of prenatal care and are more common among people with lower socio-economic status and among racially and ethnically minoritised populations.

Objectives: To assess prevalence and correlate pregnancies occurring in the immediate period after a live birth in the United States, using the Pregnancy Risk Assessment Monitoring System (PRAMS).

Prevalence of current and past COVID-19 in Ohio adults.

Purpose To estimate the prevalence of current and past COVID-19 in Ohio adults. Methods We used stratified, probability-proportionate-to-size cluster sampling. During July 2020, we enrolled 727 randomly-sampled adult English- and Spanish-speaking participants through a household survey.

Assessment of outcomes and novel immune biomarkers in metaplastic breast cancer: a single institution retrospective study.

Background: Metaplastic breast cancer remains poorly characterized given its rarity and heterogeneity. The majority of metaplastic breast cancers demonstrate a phenotype of triple-negative breast cancer; however, differences in clinical outcomes between metaplastic breast cancer and triple-negative breast cancer in the era of third-generation chemotherapy remain unclear.

Methods: We compared the clinical outcomes between women with metaplastic breast cancer and women with triple-negative breast cancer diagnosed between 1994 and 2014.