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The risk for hyponatremia was higher with thiazide drugs compared with nonthiazide drugs in older adults and patients with comorbidities.

People 70 years of age and older taking LDL cholesterol-lowering therapy for primary prevention have the same reduction in major vascular events as their younger counterparts, new research confirms.

Objective To estimate the effectiveness of the bivalent mRNA booster vaccines containing the original SARS-CoV-2 and omicron BA.4-5 or BA.1 subvariants as the fourth dose against severe covid-19. Design Nationwide cohort analyses, using target trial emulation. Setting Denmark, Finland, Norway, and Sweden, from 1 July 2022 to 10 April 2023. Participants People aged ≥50 years who had received at least three doses of covid-19 vaccine (that is, a primary course and a first booster). Main outcome measures The Kaplan-Meier estimator was used to compare the risk of hospital admission and death rela...

Objective To examine the association between the omicron adapted bivalent mRNA covid-19 booster vaccines received as a fourth dose and risk of adverse events. Design Nationwide cohort study. Setting Denmark. Participants 2 225 567 adults aged ≥50 years who received three covid-19 vaccine doses during the study period, 1 January 2021 to 10 December 2022. Main outcome measures The main outcome measure was rates of hospital visits for 27 different adverse events in a 28 day main risk period after vaccination with a bivalent omicron adapted mRNA booster vaccine as a fourth dose compared with...

Objective To investigate the comparative vaccine effectiveness of heterologous booster schedules (ie, three vaccine doses) compared with primary schedules (two vaccine doses) and with homologous mRNA vaccine booster schedules (three vaccine doses) during a period of omicron predominance. Design Population based cohort analyses. Setting Denmark, Finland, Norway, and Sweden, 27 December 2020 to 31 December 2022. Participants All adults aged ≥18 years who had received at least a primary vaccination schedule of AZD1222 (Oxford-AstraZeneca) or monovalent SARS-CoV-2 wild type (ancestral) strain ba...