Evidence map›Paper›PMID 40575188›Full record

ArticleCureus2025

Association Between Initial Symptoms and Clinical Outcomes in COVID-19.

Eiki Ichihara, Toshiharu Mitsuhashi, Mitsuru Tsuge, Kou Hasegawa, Kenichiro Kudo, Yasushi Tanimoto, Kazuhiro Nouso, Naohiro Oda, Sho Mitsumune, Goro Kimura and 9 more

Abstract read
In one paragraph

Article in Cureus, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it
0cells of the map it votes in
0citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

19 authors.

Eiki IchiharaDepartment of Allergy and Respiratory Medicine, Okayama University Hospital, Okayama, JPN.
Toshiharu MitsuhashiCenter for Innovative Clinical Medicine, Okayama University Hospital, Okayama, JPN.
Mitsuru TsugeDepartment of Pediatrics, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, JPN.
Kou HasegawaDepartment of General Medicine, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, JPN.
Kenichiro KudoDepartment of Respiratory Medicine, National Hospital Organization (NHO) Okayama Medical Center, Okayama, JPN.
Yasushi TanimotoDepartment of Respiratory Medicine, National Hospital Organization (NHO) Okayama Medical Center, Okayama, JPN.
Kazuhiro NousoDepartment of Gastroenterology, Okayama City Hospital, Okayama, JPN.
Naohiro OdaDepartment of Internal Medicine, Fukuyama City Hospital, Fukuyama, JPN.
Sho MitsumuneDepartment of Respiratory Medicine, National Hospital Organization (NHO) Okayama Medical Center, Okayama, JPN.
Goro KimuraDepartment of Respiratory Medicine, National Hospital Organization (NHO) Okayama Medical Center, Okayama, JPN.
Haruto YamadaDepartment of Infectious Diseases, Okayama City Hospital, Okayama, JPN.
Ichiro TakataDepartment of Internal Medicine, Fukuyama City Hospital, Fukuyama, JPN.
Hideharu HagiyaDepartment of General Medicine, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, JPN.
Akihiko TaniguchiDepartment of Internal Medicine, Fukuyama City Hospital, Fukuyama, JPN.
Kohei TsukaharaDepartment of Emergency, Critical Care, and Disaster Medicine, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, JPN.
Toshiyuki AokageDepartment of Emergency Medicine, Tokyo Metropolitan Institute for Geriatrics and Gerontology, Tokyo, JPN.
Shinichi ToyookaDepartment of General Thoracic Surgery and Breast and Endocrinological Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, JPN.
Hirokazu TsukaharaDepartment of Pediatrics, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, JPN.
Yoshinobu MaedaDepartment of Hematology, Oncology, and Respiratory Medicine, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, JPN.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe clinical presentation of coronavirus disease 2019 (COVID-19) ranges from localized respiratory symptoms such as cough and sore throat to systemic symptoms such as fever and fatigue. To our knowledge, no study has assessed severe disease risk by dividing onset symptoms into localized respiratory and other symptoms. We aimed to determine whether the risk of severe COVID-19 differs depending on whether the symptoms at onset are limited to local respiratory symptoms.

methodThis was a multicenter prospective cohort study. The patients were classified into localized respiratory or systemic symptom groups based on the symptoms at onset. Demographic data, blood biomarkers, and clinical outcomes, including mortality, intubation, admission to the intensive care unit, and time to discharge, were compared. This study included 100 adult patients diagnosed with COVID-19 between July 2020 and August 2021.

resultTwelve patients were classified into the localized respiratory symptom group and the remaining 88 into the systemic symptom group. No significant differences between the groups were observed in the baseline characteristics, blood biomarkers, or clinical outcomes. The mortality rates were 0.0% and 4.6%, respectively. The median durations to discharge were 11 and 10 days, respectively (p=0.512). The levels of inflammatory and oxidative stress biomarkers, including interleukin-6 and hydroperoxides, were similar between the groups.

conclusionThe symptom type at disease onset was not significantly associated with differences in clinical outcomes. Comprehensive assessments beyond initial symptoms are crucial for predicting disease progression and optimizing management strategies.

Indexed as

clinical outcomecovid-19localized respiratory symptomsevere disease risksystemic symptom

Identifiers

PMID40575188
PMCPMC12198918

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.