scholarly journals Deep radiomics-based survival prediction in patients with chronic obstructive pulmonary disease

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Jihye Yun ◽  
Young Hoon Cho ◽  
Sang Min Lee ◽  
Jeongeun Hwang ◽  
Jae Seung Lee ◽  
...  
Keyword(s):  
Chronic Obstructive Pulmonary Disease ◽  
Pulmonary Disease ◽  
Pulmonary Function Tests ◽  
External Validation ◽  
Ct Images ◽  
Chronic Obstructive ◽  
Survival Prediction ◽  
Obstructive Pulmonary Disease ◽  
Copd Patients ◽  
Fully Connected

AbstractHeterogeneous clinical manifestations and progression of chronic obstructive pulmonary disease (COPD) affect patient health risk assessment, stratification, and management. Pulmonary function tests are used to diagnose and classify the severity of COPD, but they cannot fully represent the type or range of pathophysiologic abnormalities of the disease. To evaluate whether deep radiomics from chest computed tomography (CT) images can predict mortality in patients with COPD, we designed a convolutional neural network (CNN) model for extracting representative features from CT images and then performed random survival forest to predict survival in COPD patients. We trained CNN-based binary classifier based on six-minute walk distance results (> 440 m or not) and extracted high-throughput image features (i.e., deep radiomics) directly from the last fully connected layer of it. The various sizes of fully connected layers and combinations of deep features were experimented using a discovery cohort with 344 patients from the Korean Obstructive Lung Disease cohort and an external validation cohort with 102 patients from Penang General Hospital in Malaysia. In the integrative analysis of discovery and external validation cohorts, with combining 256 deep features from the coronal slice of the vertebral body and two sagittal slices of the left/right lung, deep radiomics for survival prediction achieved concordance indices of 0.8008 (95% CI, 0.7642–0.8373) and 0.7156 (95% CI, 0.7024–0.7288), respectively. Deep radiomics from CT images could be used to predict mortality in COPD patients.

scholarly journals A Comparison of Spirometric Parameters and Serum Malondialdehyde Level in Actively Smoking Chronic Obstructive Pulmonary Disease Patients and Non- Smoking Apparently Normals- A Crosssectional Comparative Study

2021 ◽  
pp. 103-110
Author(s):  
. Ranjana ◽  
Mishra Indira Sushil ◽  
Rajiv Ranjan Prasad
Keyword(s):  
Chronic Obstructive Pulmonary Disease ◽  
Pulmonary Function ◽  
Pulmonary Disease ◽  
Flow Rate ◽  
Vital Capacity ◽  
Pulmonary Function Tests ◽  
Forced Expiratory Volume ◽  
Chronic Obstructive ◽  
Obstructive Pulmonary Disease ◽  
Copd Patients

Introduction: The antioxidants requirement depend on one’s exposure to endogenous and exogenous reactive oxygen species.Cigarette smoking leads to increased exposure to reactive oxygen species,hence they require more antioxidant nutrients In this study, we aimed to study the serum levels of malondialdehyde (MDA) as a marker of oxidative stress and pulmonary function tests (PFT) and to study if there is any correlation between PFTand MDA levels in, smokers,chronic obstructive pulmonary disease (COPD) patients. Aim: To compare the pulmonary function tests (PFT) and serum malondialdehyde (MDA) level in smokers, chronic obstructive pulmonary disease (COPD) patients with non-smoker controls. Methods and Materials: N=30, 35-50 years age group smokers, COPD patients were enrolled as cases.N=30 age and sex matched were enrolled as control group. Serum MDA and PFT parameters like forced vital capacity (FVC), forced expiratory volume in first second (FEV1), FEV1/FVC ratio, Peak expiratory flow rate (PEFR) were measured. Result: PFT parameters like forced vital capacity (FVC), forced expiratory volume in first second (FEV1), FEV1/FVC ratio, peak expiratory flow rate(PEFR) were decreased and found statistically significant in smokers, COPD group.MDA level were increase and found statistically highly significant in smokers, COPD group. Conclusion: MDA is negatively correlated with FEV1% predicted, FEV1/FVC % predicted ratio and FVC in smokers, COPD patients

scholarly journals The effect of comorbidity severity on pulmonary rehabilitation outcomes in chronic obstructive pulmonary disease patients

2018 ◽  
Vol 16 ◽  
pp. 147997231880947
Author(s):  
Ilknur Naz ◽  
Hulya Sahin ◽  
Yelda Varol ◽  
Berna Kömürcüoğlu
Keyword(s):  
Quality Of Life ◽  
Chronic Obstructive Pulmonary Disease ◽  
Pulmonary Disease ◽  
Pulmonary Rehabilitation ◽  
Pulmonary Function Tests ◽  
Chronic Obstructive ◽  
Obstructive Pulmonary Disease ◽  
Copd Patients ◽  
Group 2

Chronic obstructive pulmonary disease (COPD) is not only associated with respiratory system involvement but also with systemic consequences leading to chronic comorbidities. In this study, we aimed to investigate the effect of comorbidity severity on pulmonary rehabilitation (PR) outcomes in COPD patients. We conducted a retrospective cohort study to compare the effectiveness of PR in COPD patients who completed an 8-week PR program. There were at least one comorbid in 120 of 211 patients and we divided them into the groups according to Charlson Comorbidity Index (CCI) scores (1 points, group 1 ( n = 54); 2 points, group 2 ( n = 41); 3 points, group 3 ( n = 25)). We compared 6-minute walk distance (MWD), dyspnea perception, pulmonary function tests, blood gases analysis, quality of life, anxiety, and depression scores which were recorded before and after PR between the groups. Before PR 6-MWD distance was significantly lower in group 2 ( p = 0.033). Improvements in 6-MWD, blood gas values, dyspnea perception, quality of life, and anxiety were determined in all groups after PR ( p < 0.05). When the gains after PR were compared, there were no significant differences between groups ( p > 0.05). COPD patients benefit from PR independent from their comorbidity severity. Comorbidity severity has no effect on PR gains. Therefore, patients with comorbidities should not be excluded from PR programs and encouraged to participate. Clinical Trial Number: NCT03319108.

scholarly journals Prognostic models for outcome prediction in patients with chronic obstructive pulmonary disease: systematic review and critical appraisal

BMJ ◽  
2019 ◽  
pp. l5358 ◽  
Author(s):  
Vanesa Bellou ◽  
Lazaros Belbasis ◽  
Athanasios K Konstantinidis ◽  
Ioanna Tzoulaki ◽  
Evangelos Evangelou
Keyword(s):  
Systematic Review ◽  
Chronic Obstructive Pulmonary Disease ◽  
Pulmonary Disease ◽  
Outcome Prediction ◽  
External Validation ◽  
Prognostic Models ◽  
Future Research ◽  
Chronic Obstructive ◽  
Obstructive Pulmonary Disease ◽  
Copd Patients

Abstract Objective To map and assess prognostic models for outcome prediction in patients with chronic obstructive pulmonary disease (COPD). Design Systematic review. Data sources PubMed until November 2018 and hand searched references from eligible articles. Eligibility criteria for study selection Studies developing, validating, or updating a prediction model in COPD patients and focusing on any potential clinical outcome. Results The systematic search yielded 228 eligible articles, describing the development of 408 prognostic models, the external validation of 38 models, and the validation of 20 prognostic models derived for diseases other than COPD. The 408 prognostic models were developed in three clinical settings: outpatients (n=239; 59%), patients admitted to hospital (n=155; 38%), and patients attending the emergency department (n=14; 3%). Among the 408 prognostic models, the most prevalent endpoints were mortality (n=209; 51%), risk for acute exacerbation of COPD (n=42; 10%), and risk for readmission after the index hospital admission (n=36; 9%). Overall, the most commonly used predictors were age (n=166; 41%), forced expiratory volume in one second (n=85; 21%), sex (n=74; 18%), body mass index (n=66; 16%), and smoking (n=65; 16%). Of the 408 prognostic models, 100 (25%) were internally validated and 91 (23%) examined the calibration of the developed model. For 286 (70%) models a model presentation was not available, and only 56 (14%) models were presented through the full equation. Model discrimination using the C statistic was available for 311 (76%) models. 38 models were externally validated, but in only 12 of these was the validation performed by a fully independent team. Only seven prognostic models with an overall low risk of bias according to PROBAST were identified. These models were ADO, B-AE-D, B-AE-D-C, extended ADO, updated ADO, updated BODE, and a model developed by Bertens et al. A meta-analysis of C statistics was performed for 12 prognostic models, and the summary estimates ranged from 0.611 to 0.769. Conclusions This study constitutes a detailed mapping and assessment of the prognostic models for outcome prediction in COPD patients. The findings indicate several methodological pitfalls in their development and a low rate of external validation. Future research should focus on the improvement of existing models through update and external validation, as well as the assessment of the safety, clinical effectiveness, and cost effectiveness of the application of these prognostic models in clinical practice through impact studies. Systematic review registration PROSPERO CRD42017069247

scholarly journals Gastroesophageal Reflux Symptoms in Patients with Chronic Obstructive Pulmonary Disease

2014 ◽  
Vol 2 (3) ◽  
pp. 461-463
Author(s):  
Zlatica Goseva ◽  
Angelko Gjorcev ◽  
Elena Jovanovska-Janeva ◽  
Suzana Arbutina
Keyword(s):  
Chronic Obstructive Pulmonary Disease ◽  
Gastroesophageal Reflux ◽  
Pulmonary Disease ◽  
Pulmonary Function Tests ◽  
Control Group ◽  
Chronic Obstructive ◽  
Obstructive Pulmonary Disease ◽  
Airways Obstruction ◽  
Reflux Symptoms ◽  
Copd Patients

BACKGROUND: It is known that there is some relation between airways obstruction and gastroesophageal reflux symptoms (GER) symptoms in patients with chronic obstructive pulmonary disease (COPD).AIM: The aim was to determine frequency of GER symptoms and correlation with pulmonary function tests in patients with COPD.MATERIAL AND METHODS: The study included 58 patients. First group had 20 patients with mild COPD, second group had 18 patients with moderate COPD and third group had 20 patients with severe COPD. We had also a control group with 12 healthy subjects. All subjects completed their self-reported questionnaire about symptoms like: acid-regurgitation, heartburn, dysphagia, dyspnea and chronic cough.RESULTS: COPD patients with airways obstruction and significant GER symptoms had their respiratory symptoms associated with reflux events. More of COPD patients had significant GER symptoms defined as regurgitation and dysphagia once or more per week. Patients with FEV1 less than 50% showed more prevalent GER symptoms compared to those with values of FEV1 grater then 50%.CONCLUSION: GER symptoms are more prevalent in patients with severe airways obstruction when compared to less airways obstructed group and controls. We could suggest an association between the degree of airways obstruction in patients with COPD and the increased rate of GER symptoms.

Oral and Oropharyngeal Sensory Function in Adults With Chronic Obstructive Pulmonary Disease

2020 ◽  
Vol 29 (2) ◽  
pp. 864-872
Author(s):  
Fernanda Borowsky da Rosa ◽  
Adriane Schmidt Pasqualoto ◽  
Catriona M. Steele ◽  
Renata Mancopes
Keyword(s):  
Chronic Obstructive Pulmonary Disease ◽  
Oral Cavity ◽  
Pulmonary Disease ◽  
Thermal Sensation ◽  
Sensory Function ◽  
Control Group ◽  
Chronic Obstructive ◽  
Obstructive Pulmonary Disease ◽  
Age Related ◽  
Copd Patients

Introduction The oral cavity and pharynx have a rich sensory system composed of specialized receptors. The integrity of oropharyngeal sensation is thought to be fundamental for safe and efficient swallowing. Chronic obstructive pulmonary disease (COPD) patients are at risk for oropharyngeal sensory impairment due to frequent use of inhaled medications and comorbidities including gastroesophageal reflux disease. Objective This study aimed to describe and compare oral and oropharyngeal sensory function measured using noninstrumental clinical methods in adults with COPD and healthy controls. Method Participants included 27 adults (18 men, nine women) with a diagnosis of COPD and a mean age of 66.56 years ( SD = 8.68). The control group comprised 11 healthy adults (five men, six women) with a mean age of 60.09 years ( SD = 11.57). Spirometry measures confirmed reduced functional expiratory volumes (% predicted) in the COPD patients compared to the control participants. All participants completed a case history interview and underwent clinical evaluation of oral and oropharyngeal sensation by a speech-language pathologist. The sensory evaluation explored the detection of tactile and temperature stimuli delivered by cotton swab to six locations in the oral cavity and two in the oropharynx as well as identification of the taste of stimuli administered in 5-ml boluses to the mouth. Analyses explored the frequencies of accurate responses regarding stimulus location, temperature and taste between groups, and between age groups (“≤ 65 years” and “> 65 years”) within the COPD cohort. Results We found significantly higher frequencies of reported use of inhaled medications ( p < .001) and xerostomia ( p = .003) in the COPD cohort. Oral cavity thermal sensation ( p = .009) was reduced in the COPD participants, and a significant age-related decline in gustatory sensation was found in the COPD group ( p = .018). Conclusion This study found that most of the measures of oral and oropharyngeal sensation remained intact in the COPD group. Oral thermal sensation was impaired in individuals with COPD, and reduced gustatory sensation was observed in the older COPD participants. Possible links between these results and the use of inhaled medication by individuals with COPD are discussed.

Clinical and functional peculiarities at patients with bronchial asthma, chronic obstructive pulmonary disease and overlap of asthma-chronic obstructive pulmonary disease

2020 ◽  
Vol 24 (4) ◽  
pp. 80-86
Author(s):  
V. I. Trofimov ◽  
D. Z. Baranov
Keyword(s):  
Chronic Obstructive Pulmonary Disease ◽  
Pulmonary Disease ◽  
Bronchial Asthma ◽  
Blood Test ◽  
Chronic Obstructive ◽  
Inflammation Markers ◽  
Obstructive Pulmonary Disease ◽  
Copd Patients ◽  
Functional Features ◽  
Lower Airways

BACKGROUND: a comparative analysis of laboratory and instrumental tests at patients with bronchial obstructive diseases seems very actual due to the wide prevalence of these diseases. THE AIM: to evaluate characteristics of spirometry as well as allergic (total IgE, sputum eosinophils) and infectious (blood and sputum leucocytes, ESR, CRP, fibrinogen) inflammation markers at patients with bronchial obstructive diseases. PATIENTS AND METHODS: 104 case histories of patients with bronchial asthma, chronic obstructive pulmonary disease and overlap were analyzed including age, duration of smoking (pack-years), laboratory (clinical blood test, biochemical blood test, general sputum analysis, sputum culture) and instrumental (spirometry, body plethysmography, echocardiography) tests. Data were processed statistically with non-parametric methods. RESULTS: COPD patients were older than other groups’ patients, had the highest pack-years index. ACO patients were marked with maximal TLC and Raw, minimal FEV1, FEF25-75, FEV1/FVC. Patients with COPD had the highest inflammation markers (leucocyte count, CRP, fibrinogen). CONCLUSION: high active inflammation may cause severe lower airways possibility disorders at patients with COPD. Data related to a possible role of K. pneumoniaе in the pathogenesis of eosinophilic inflammation in lower airways are of significant interest. Patients with ACO occupy an intermediate position between asthma and COPD patients based on clinical and functional features.

scholarly journals LINC01414/LINC00824 genetic polymorphisms in association with the susceptibility of chronic obstructive pulmonary disease

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Xiaoman Zhou ◽  
Yunjun Zhang ◽  
Yutian Zhang ◽  
Quanni Li ◽  
Mei Lin ◽  
...  
Keyword(s):  
Chronic Obstructive Pulmonary Disease ◽  
Pulmonary Disease ◽  
Genetic Polymorphisms ◽  
Chronic Obstructive ◽  
Nucleotide Polymorphisms ◽  
Obstructive Pulmonary Disease ◽  
Logistic Analysis ◽  
Copd Patients ◽  
Increased Risk ◽  
And Gender

Abstract Objective Chronic obstructive pulmonary disease (COPD) is a complicated multi-factor, multi-gene disease. Here, we aimed to assess the association of genetic polymorphisms in LINC01414/ LINC00824 and interactions with COPD susceptibility. Methods Three single nucleotide polymorphisms (SNPs) in LINC01414/LINC00824 was genotyped by Agena MassARRAY platform among 315 COPD patients and 314 controls. Logistic analysis adjusted by age and gender were applied to estimate the genetic contribution of selected SNPs to COPD susceptibility. Results LINC01414 rs699467 (OR = 0.73, 95% CI 0.56–0.94, p = 0.015) and LINC00824 rs7815944 (OR = 0.56, 95% CI 0.31–0.99, p = 0.046) might be protective factors for COPD occurrence, while LINC01414 rs298207 (OR = 2.88, 95% CI 1.31–6.31, p = 0.008) risk-allele was related to the increased risk of COPD in the whole population. Rs7815944 was associated with the reduced risk of COPD in the subjects aged > 70 years (OR = 0.29, p = 0.005). Rs6994670 (OR = 0.57, p = 0.007) contribute to a reduced COPD risk, while rs298207 (OR = 7.94, p = 0.009) was related to a higher susceptibility to COPD at age ≤ 70 years. Rs298207 (OR = 2.54, p = 0.043) and rs7815944 (OR = 0.43, p = 0.028) variants was associated COPD risk among males. Rs7815944 (OR = 0.16, p = 0.031) was related to the reduced susceptibility of COPD in former smokers. Moreover, the association between rs298207 genotype and COPD patients with dyspnea was found (OR = 0.50, p = 0.016), and rs7815944 was related to COPD patients with wheezing (OR = 0.22, p = 0.008). Conclusion Our finding provided further insights into LINC01414/LINC00824 polymorphisms at risk of COPD occurrence and accumulated evidence for the genetic susceptibility of COPD.

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