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Observational studies

Association between Eubacterium saphenum and periodontitis: A systematic review

Sarah Al-Rihaymee, Hayder Raad Abdulbaqi, Ali A. Abdulkareem, Wan Himratul Aznita Wan Harun, Nor Adinar Baharuddin

published 02 Sep 2026

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Who is more likely to make causal claims in observational studies? The role of author experience, team size, cultural background, and gender in scientific framing

Jun Wang, Bei Yu

published 12 Aug 2026

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OphthoEvidence report: Comparative effects of prophylactic strategies for post-intravitreal injection endophthalmitis: Protocol for a systematic review and network meta-analysis

Maryam Ghadimi, Dena Zeraatkar, João Pedro Lima, Jinhui Ma, Sunir Garg, Peter Kaiser, David Steel, Tien Yin Wong, Sobha Sivaprasad, Charles Wykoff, Varun Chaudhary

published 28 Jul 2026

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Association between cervical spine clinical active range of motion and pain or disability in people with neuromusculoskeletal neck pain: A systematic review and meta-analysis

Saghar Soltanabadi, Sima Vatandoost, Mohammad Bayattork, Michael J. Lukacs, Alison Rushton, David M. Walton

published 24 Jul 2026

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Robust policy evaluation from large-scale observational studies

Md Saiful Islam, Md Sarowar Morshed, Gary J. Young, Md. Noor-E-Alam

published 30 Jun 2026

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Long-term adherence to adapted physical activity in patients with chronic inflammatory arthritis: Insights from a longitudinal observational study

Hugo Gondouin, Mathias Poussel, Eliane Albuisson, Margaux Temperelli, Oriane Hily, Anthony Moussu, Isabelle Chary-Valckenaere, Damien Loeuille, Bruno Chenuel, Edem Allado

published 20 May 2026

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Glucose dysregulation in hospitalized non-critically ill patients with a suspected infection: A prospective study using continuous glucose monitoring

Anna D. Schoonhoven, Julia J. Bakker, Alessandra D. Di Mauro, Amarens van der Vaart, Riemer Been, André P. van Beek, Pratik Choudhary, Hjalmar R. Bouma, Peter R. van Dijk

published 02 Mar 2026

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Three-dimensional evaluation of soft tissue contour changes after premolar extraction with and without alveolar ridge preservation: A prospective observational study

Yun-Jeong Kim, Mi Young Lee, Jae-Eun Chung, Jang-Hyun Kim, Ji-Man Park, Ki-Tae Koo, Young Ku

published 27 Feb 2026

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Using GDACS to anticipate clinical and operational burden after earthquakes: A global event-level analysis (2020–2024)

Ahmet Aykut, Ertuğ Günsoy, Cem Yıldırım

published 13 Jan 2026

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Cell salvage in bacterially contaminated surgical fields – A scoping review

Joeri Slob, Pim Hondebrink, Ankie W.M.M. Koopman – van Gemert, Margriet E. van Baar, Cornelis H. van der Vlies, Seppe S. H. A. Koopman

published 05 Jan 2026

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The impossible confounder: Quantifying the limits of alternative explanations for COVID-19 vaccine effectiveness

Tommaso Costa

published 04 Dec 2025

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The associations of premorbid social isolation and social support with self-rated health and heart failure outcomes in the atherosclerosis risk in communities (ARIC) Study

Kennedy M. Peter-Marske, Annie Green Howard, Kelly R. Evenson, Sara Jones Berkeley, Joanna Maselko, Mario Sims, Stuart D. Russell, Anna Kucharska-Newton, Kevin J. Sullivan, Wayne D. Rosamond

published 25 Nov 2025

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Association of ambulance and helicopter response times with patient survival: A systematic literature review and meta-analysis

Peter Martin Hansen, Martine Siw Nielsen, Marius Rehn, Annmarie Lassen, Anders Perner, Søren Mikkelsen, Anne Craveiro Brøchner

published 17 Nov 2025

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