Evidence map›Paper›PMID 26824900›Full record

ArticlePloS one2016

Classification of Asthma Based on Nonlinear Analysis of Breathing Pattern.

Mohammad Reza Raoufy, Tara Ghafari, Reza Darooei, Milad Nazari, Seyed Alireza Mahdaviani, Ali Reza Eslaminejad, Mehdi Almasnia, Shahriar Gharibzadeh, Ali R Mani, Sohrab Hajizadeh

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
26citing papers in PubMed, 2 pooled it
4.5field-weighted citation impact, top 5% of its field
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

26 citing papers in PubMed, 2 syntheses or guidelines pooled it, 65 citations in OpenAlex.

  1. Physiological signal entropy in patients with chronic respiratory disease: a systematic review.European respiratory review : an official journal of the European Respiratory Society · 2025
    Pooled it
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  6. Leveraging intrinsic non-sinusoidal patterns to infer search behavior to predict exposure to respiratory stressors.American journal of physiology. Lung cellular and molecular physiology · 2025
    Article
  7. [Exploratory study on quantitative analysis of nocturnal breathing patterns in patients with acute heart failure based on wearable devices].Sheng wu yi xue gong cheng xue za zhi = Journal of biomedical engineering = Shengwu yixue gongchengxue zazhi · 2023
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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

10 authors at 6 institutions in 2 countries.

Mohammad Reza RaoufyDepartment of Physiology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran.
Tara GhafariDepartment of Physiology, Medical School, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Reza DarooeiDepartment of Biomedical Engineering, Faculty of Electrical and Computer Engineering, Tarbiat Modares University, Tehran, Iran.
Milad NazariFaculty of Electrical Engineering, Sharif University of Technology, Tehran, Iran.
Seyed Alireza MahdavianiPediatric Respiratory Diseases Research Center, National Research Institute of Tuberculosis and Lung Diseases (NRITLD), Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Ali Reza EslaminejadTracheal Diseases Research Center, National Research Institute of Tuberculosis and Lung Diseases (NRITLD), Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Mehdi AlmasniaChronic Respiratory Diseases Research Center, National Research Institute of Tuberculosis and Lung Diseases (NRITLD), Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Shahriar GharibzadehDepartment of Bioelectric, Faculty of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran.
Ali R ManiDivision of Medicine, UCL, London, United Kingdom.
Sohrab HajizadehDepartment of Physiology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran.
Tarbiat Modares University · IRMasih Daneshvari Hospital · IRShahid Beheshti University of Medical Sciences · IRAmirkabir University of Technology · IRSharif University of Technology · IRUniversity College London · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Normal human breathing exhibits complex variability in both respiratory rhythm and volume. Analyzing such nonlinear fluctuations may provide clinically relevant information in patients with complex illnesses such as asthma. We compared the cycle-by-cycle fluctuations of inter-breath interval (IBI) and lung volume (LV) among healthy volunteers and patients with various types of asthma. Continuous respiratory datasets were collected from forty age-matched men including 10 healthy volunteers, 10 patients with controlled atopic asthma, 10 patients with uncontrolled atopic asthma, and 10 patients with uncontrolled non-atopic asthma during 60 min spontaneous breathing. Complexity of breathing pattern was quantified by calculating detrended fluctuation analysis, largest Lyapunov exponents, sample entropy, and cross-sample entropy. The IBI as well as LV fluctuations showed decreased long-range correlation, increased regularity and reduced sensitivity to initial conditions in patients with asthma, particularly in uncontrolled state. Our results also showed a strong synchronization between the IBI and LV in patients with uncontrolled asthma. Receiver operating characteristic (ROC) curve analysis showed that nonlinear analysis of breathing pattern has a diagnostic value in asthma and can be used in differentiating uncontrolled from controlled and non-atopic from atopic asthma. We suggest that complexity analysis of breathing dynamics may represent a novel physiologic marker to facilitate diagnosis and management of patients with asthma. However, future studies are needed to increase the validity of the study and to improve these novel methods for better patient management.

Indexed as

RespirationAdultAsthmaCase-Control StudiesHumansMaleNonlinear DynamicsPlethysmographyRespiratory RateROC CurveTidal Volume

Identifiers

PMID26824900
PMCPMC4732950
OpenAlexW2273030387

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

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.