Otávio T. Ranzani

8.5k total citations · 5 hit papers
155 papers, 4.3k citations indexed

About

Otávio T. Ranzani is a scholar working on Critical Care and Intensive Care Medicine, Epidemiology and Infectious Diseases. According to data from OpenAlex, Otávio T. Ranzani has authored 155 papers receiving a total of 4.3k indexed citations (citations by other indexed papers that have themselves been cited), including 57 papers in Critical Care and Intensive Care Medicine, 56 papers in Epidemiology and 30 papers in Infectious Diseases. Recurrent topics in Otávio T. Ranzani's work include Nosocomial Infections in ICU (34 papers), Sepsis Diagnosis and Treatment (28 papers) and Pneumonia and Respiratory Infections (25 papers). Otávio T. Ranzani is often cited by papers focused on Nosocomial Infections in ICU (34 papers), Sepsis Diagnosis and Treatment (28 papers) and Pneumonia and Respiratory Infections (25 papers). Otávio T. Ranzani collaborates with scholars based in Brazil, Spain and United Kingdom. Otávio T. Ranzani's co-authors include Antoní Torres, Elena Prina, Fernando G. Zampieri, Marcelo Park, Luciano César Pontes Azevedo, Miquel Ferrer, Daniel Neves Forte, Fernando A. Bozza, Sílvio Hamacher and Leonardo dos Santos Lourenço Bastos and has published in prestigious journals such as The Lancet, JAMA and Nature Communications.

In The Last Decade

Otávio T. Ranzani

142 papers receiving 4.2k citations

Hit Papers

5 papers align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Community-acquired pneumonia

2015 345 citations Elena Prina, Otávio T. Ranzani et al. profile →
C-Reactive Protein/Albumin Ratio Predicts 90-Day Mortality of Septic Patients

2013 329 citations Otávio T. Ranzani, Fernando G. Zampieri et al. profile →
Characterisation of the first 250 000 hospital admissions for COVID-19 in Brazil: a retrospective analysis of nationwide data

2021 273 citations Otávio T. Ranzani, Leonardo dos Santos Lourenço Bastos et al. The Lancet Respiratory Medicine profile →
Effectiveness of the CoronaVac vaccine in older adults during a gamma variant associated epidemic of covid-19 in Brazil: test negative case-control study

2021 195 citations Otávio T. Ranzani, Matt D. T. Hitchings et al. profile →
Post-acute sequelae of COVID-19: understanding and addressing the burden of multisystem manifestations

2023 109 citations Matteo Parotto, Sheila Nainan Myatra et al. The Lancet Respiratory Medicine profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
Otávio T. Ranzani Brazil	33	1.5k	1.0k	838	784	437	155	4.3k
Bin Du China	35	2.0k 1.3×	1.5k 1.5×	1.2k 1.5×	1.2k 1.5×	1.0k 2.3×	177	6.1k
Valentín Hernández‐Barrera Spain	40	1.9k 1.3×	289 0.3×	518 0.6×	935 1.2×	698 1.6×	353	6.3k
Charles D. Gomersall Hong Kong	37	1.1k 0.7×	763 0.8×	1.2k 1.4×	1.3k 1.6×	492 1.1×	116	5.0k
Chanu Rhee United States	36	3.7k 2.4×	1.5k 1.5×	906 1.1×	819 1.0×	748 1.7×	166	6.3k
Jennie Johnstone Canada	35	1.7k 1.1×	263 0.3×	934 1.1×	629 0.8×	384 0.9×	140	4.5k
Alessandro Cassini Sweden	21	1.3k 0.9×	382 0.4×	720 0.9×	240 0.3×	271 0.6×	56	3.7k
Rakesh Lodha India	40	2.1k 1.4×	518 0.5×	1.7k 2.1×	1.7k 2.2×	858 2.0×	444	6.6k
Jens‐Ulrik Stæhr Jensen Denmark	30	1.6k 1.0×	455 0.5×	433 0.5×	796 1.0×	652 1.5×	211	4.5k
Roslyn A. Stone United States	37	1.7k 1.1×	645 0.6×	221 0.3×	661 0.8×	639 1.5×	126	6.0k
Adit A. Ginde United States	42	1.2k 0.8×	385 0.4×	483 0.6×	777 1.0×	547 1.3×	214	7.8k

Countries citing papers authored by Otávio T. Ranzani

Since Specialization

Citations

This map shows the geographic impact of Otávio T. Ranzani's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Otávio T. Ranzani with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Otávio T. Ranzani more than expected).

Fields of papers citing papers by Otávio T. Ranzani

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Otávio T. Ranzani. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Otávio T. Ranzani. The network helps show where Otávio T. Ranzani may publish in the future.

Co-authorship network of co-authors of Otávio T. Ranzani

This figure shows the co-authorship network connecting the top 25 collaborators of Otávio T. Ranzani. A scholar is included among the top collaborators of Otávio T. Ranzani based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Otávio T. Ranzani. Otávio T. Ranzani is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Salluh, Jorge I., Luigi Pisani, Antônio Paulo Nassar, et al.. (2025). Critical care research in low- and middle-income countries: a narrative review. Thorax. thorax–2024.

Alari, Anna, Otávio T. Ranzani, Carles Milà, et al.. (2024). Long-term exposure to air pollution and lower respiratory infections in a large population-based adult cohort in Catalonia. Environment International. 195. 109230–109230. 6 indexed citations

Amin, Avnika B., Matt D. T. Hitchings, Otávio T. Ranzani, et al.. (2024). Severity-dependent test-seeking behaviors and test-negative designs: impact on estimated vaccine effectiveness and utility of analytic and design choices. American Journal of Epidemiology. 194(7). 1855–1862.

Salluh, Jorge I., Bruno Adler Maccagnan Pinheiro Besen, Sebastián González‐Dambrauskas, et al.. (2024). Preenchendo a lacuna de conhecimento em cuidados intensivos: a importância das publicações de países de baixa e média renda. 36. 1 indexed citations

Soares, Márcio, Leonardo dos Santos Lourenço Bastos, Fernando G. Zampieri, et al.. (2024). Atualização da Epimed Monitor Adult ICU Database: 15 anos de uso em registros nacionais, iniciativas de melhoria da qualidade e pesquisa clínica. 36.

Peres, Igor Tona, Fernanda Baião, Otávio T. Ranzani, et al.. (2023). What we talk about when we talk about COVID-19 vaccination campaign impact: a narrative review. Frontiers in Public Health. 11. 1126461–1126461. 3 indexed citations

Bastos, Leonardo dos Santos Lourenço, et al.. (2023). Effectiveness of a multicomponent intervention to face the COVID-19 pandemic in Rio de Janeiro’s favelas: difference-in-differences analysis. BMJ Global Health. 8(5). e009997–e009997. 2 indexed citations

Lind, Margaret L., Alexander J. Robertson, Julio Silva, et al.. (2022). Association between primary or booster COVID-19 mRNA vaccination and Omicron lineage BA.1 SARS-CoV-2 infection in people with a prior SARS-CoV-2 infection: A test-negative case–control analysis. PLoS Medicine. 19(12). e1004136–e1004136. 11 indexed citations

Ranzani, Otávio T., Matt D. T. Hitchings, Rosana Leite de Melo, et al.. (2022). Effectiveness of an inactivated Covid-19 vaccine with homologous and heterologous boosters against Omicron in Brazil. Nature Communications. 13(1). 5536–5536. 67 indexed citations

10.

Parotto, Matteo, Sheila Nainan Myatra, Daniel Munblit, et al.. (2021). Recovery after prolonged ICU treatment in patients with COVID-19. The Lancet Respiratory Medicine. 9(8). 812–814. 17 indexed citations

11.

Ceccato, Adrián, Cristina Dominedò, Miquel Ferrer, et al.. (2021). Prediction of ventilator-associated pneumonia outcomes according to the early microbiological response: a retrospective observational study. European Respiratory Journal. 59(4). 2100620–2100620. 4 indexed citations

12.

Hitchings, Matt D. T., Otávio T. Ranzani, Murilo Dorión, et al.. (2021). Effectiveness of ChAdOx1 vaccine in older adults during SARS-CoV-2 Gamma variant circulation in São Paulo. Nature Communications. 12(1). 6220–6220. 52 indexed citations

13.

Ceccato, Adrián, Raúl Méndez, Santiago Ewig, et al.. (2020). Validation of a Prediction Score for Drug-Resistant Microorganisms in Community-acquired Pneumonia. Annals of the American Thoracic Society. 18(2). 257–265. 13 indexed citations

14.

Ceccato, Adrián, Otávio T. Ranzani, Marta Martín-Fernández, et al.. (2019). Lymphocytopenia as a Predictor of Mortality in Patients with ICU-Acquired Pneumonia. Journal of Clinical Medicine. 8(6). 843–843. 32 indexed citations

15.

Bassi, Gianluigi Li, Raquel Guillamat‐Prats, Antonio Artigas, et al.. (2018). Appraisal of systemic inflammation and diagnostic markers in a porcine model of VAP: secondary analysis from a study on novel preventive strategies. Intensive Care Medicine Experimental. 6(1). 42–42. 3 indexed citations

16.

Ceccato, Adrián, Catia Cillóniz, Ignacio Martín‐Loeches, et al.. (2018). Effect of Combined β-Lactam/Macrolide Therapy on Mortality According to the Microbial Etiology and Inflammatory Status of Patients With Community-Acquired Pneumonia. CHEST Journal. 155(4). 795–804. 28 indexed citations

17.

Ranzani, Otávio T., Elena Prina, Rosario Menéndez, et al.. (2017). New Sepsis Definition (Sepsis-3) and Community-acquired Pneumonia Mortality. A Validation and Clinical Decision-Making Study. American Journal of Respiratory and Critical Care Medicine. 196(10). 1287–1297. 123 indexed citations

18.

Noritomi, Danilo Teixeira, et al.. (2016). Evaluation of cost-effectiveness from the funding body’s point of view of ultrasound-guided central venous catheter insertion compared with the conventional technique. Revista Brasileira de Terapia Intensiva. 28(1). 62–9. 9 indexed citations

19.

Ranzani, Otávio T., Fernando G. Zampieri, Leandro Utino Taniguchi, et al.. (2013). The effects of discharge to an intermediate care unit after a critical illness: A 5-year cohort study. Journal of Critical Care. 29(2). 230–235. 21 indexed citations

20.

Ranzani, Otávio T., et al.. (2011). Outcomes and organ dysfunctions of critically ill patients with systemic lupus erythematosus and other systemic rheumatic diseases. SHILAP Revista de lepidopterología. 1 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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