Validation of a Questionnaire on Sexual and Reproductive Health Among Immigrant Vocational Education Students in Portugal from São Tomé and Príncipe.

Sexual and reproductive health interventions' effectiveness should be evaluated using a valid instrument. This study aimed to validate a questionnaire on sexual and reproductive health in adolescents and young adults from São Tomé and Príncipe who voluntarily enrolled in a vocational school in Portugal to complete their 12th school year and obtain a professional card.A questionnaire consisting of perception and knowledge sections was adapted from previous questionnaires.

Evaluation of the Real-World Effectiveness of Vaccines against COVID-19 at a Local Level: Protocol for a Test-Negative Case-Control Study.

Vaccines against COVID-19 approved for use in the EU/EEA have been shown to be highly effective against wild-type SARS-CoV-2. However, their effectiveness against new variants may be reduced. This study aims to evaluate the effectiveness of vaccines against COVID-19 in the prevention of symptomatic and severe disease, during pre- and post-omicron phases.

Western long-term accuracy of serum pepsinogen-based gastric cancer screening.

Background: Even though mass gastric cancer screening is controversial in Western countries, diverse strategies have been proposed in intermediate-risk to high-risk areas.

Aim: The aim of this study was to determine the long-term accuracy of the pepsinogen test (PG) for early diagnosis of gastric cancer.

Participants And Methods: A cohort of inhabitants from the Northern part of Portugal, aged between 40 and 74 years (n=5913), subjected to the PG test (PGI≤70 ng/ml and PGI/PGII≤3), were followed up between November 2006 and December 2015.