Brazilian Journal of Pulmonology

ISSN (on-line): 1806-3756 | ISSN (printed): 1806-3713


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Year 2019 - Volume 45  - Number 6  (November/December)



1 - The future is now

O futuro é agora

Frederico Leon Arrabal Fernandes1,2,3,a, Suzana Erico Tanni4,b

J Bras Pneumol.2019;45(6):e20190354

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2 - The need for a national perspective to improve COPD management

A necessidade de uma perspectiva nacional para melhorar o manejo da DPOC

Fabiano Di Marco1,2,a, Giulia Maria Pellegrino1,3,b, Giuseppe Francesco Sferrazza Papa3,c

J Bras Pneumol.2019;45(6):e20190349

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4 - Latent tuberculosis and the use of immunomodulatory agents.

A tuberculose latente e o uso de imunomoduladores.

Fábio Silva Aguiar1,a, Fernanda Carvalho de Queiroz Mello1,b.

J Bras Pneumol.2019;45(6):e20190361

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Continuing Education: Imaging

5 - Mosaic attenuation.

Atenuação em mosaico.

Edson Marchiori1,a, Bruno Hochhegger2,b, Gláucia Zanetti1,c.

J Bras Pneumol.2019;45(6):e20190343

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Continuing Education : Scientific Methodology

Continuing Education: Respiratory Physiology

Original Article

8 - Multidisciplinary education with a focus on COPD in primary health care

Educação multiprofissional com foco na DPOC na atenção primária à saúde

Erikson Custódio Alcântara1,2,a, Krislainy de Sousa Corrêa2,3,b, José Roberto Jardim4,c, Marcelo Fouad Rabahi5,d

J Bras Pneumol.2019;45(6):e20180230

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Objective: To evaluate the use of video lessons on the topic of COPD as a training tool for a multidisciplinary team working in the primary health care sector. Methods: This was a quasi-experimental study involving a multidisciplinary team working at a primary health care clinic. The level of knowledge about COPD was measured by applying a specific, 16-item questionnaire - before, immediately after, and three months after the video lessons. In a set of six structured video lessons, the training focused on the prevention, case-finding, treatment, and monitoring of cases of COPD. The data were analyzed with the Friedman test, the Kruskal-Wallis test, Tukey's post hoc test, Dunnett's test, and the Bonferroni test. Results: There was a significant difference between the periods before and immediately after the training in terms of the scores on 15 of the 16 items on the questionnaire regarding the level of knowledge about COPD. The median total score of the participants increased significantly, from 60 points before the training to 77 points immediately thereafter and 3 months thereafter (p < 0.001 for both). Before the training, 23 (63.9%) and 13 (36.1%) of the members of the multidisciplinary team presented strong and very strong levels of agreement, respectively, among the 16 questionnaire items. After the training, 100% of the individuals presented a very strong degree of agreement. Conclusions: Multidisciplinary education through video lessons increased the knowledge of COPD on the part of a primary health care team, and the knowledge acquired was retained for at least three months after the intervention.


Keywords: Instructional films and videos; Pulmonary disease, chronic obstructive; Inservice training; Primary health care; Education, medical.


9 - Anthropometric status of individuals with COPD in the city of São Paulo, Brazil, over time - analysis of a population-based study

Análise evolutiva antropométrica em indivíduos com DPOC na cidade de São Paulo - estudo de base populacional

Josiane Marchioro1,a, Mariana Rodrigues Gazzotti1,b, Graciane Laender Moreira1,c, Beatriz Martins Manzano1,d, Ana Maria Baptista Menezes2,e, Rogélio Perez-Padilla3,f, José Roberto Jardim1,g, Oliver Augusto Nascimento1,4,h; PLATINO Team

J Bras Pneumol.2019;45(6):e20170157

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Objective: To evaluate the anthropometric data obtained for residents of the city of São Paulo, Brazil, in a study of Latin America conducted in two phases (baseline, in 2003, and follow-up, in 2012). Methods: This was an analysis of data obtained for São Paulo residents in a two-phase population-based study evaluating the prevalence of COPD and its relationship with certain risk factors among individuals ≥ 40 years of age. The anthropometric data included values for weight, height, body mass index (BMI), and waist circumference. In the follow-up phase of that study, the same variables were evaluated in the same population sample as that of the baseline phase. Results: Of the 1,000 São Paulo residents enrolled in the baseline phase of that study, 587 participated in the follow-up phase, and 80 (13.6%) of those 587 subjects had COPD. Comparing the baseline and follow-up phases, we found increases in all anthropometric measures in both groups (COPD and non-COPD), although the differences were significant only in the non-COPD group. The subjects with mild COPD showed increases in weight and BMI (Δweight = 1.6 ± 5.7 and ΔBMI = 0.7 ± 2.2), whereas those with moderate or severe COPD showed reductions (Δweight = −1.7 ± 8.1 and ΔBMI = −0.4 ± 3.0), as did those with severe or very severe COPD (Δweight = −0.5 ± 5.4 and ΔBMI = −0.8 ± 3.3). Conclusions: Between the two phases of the study, the subjects with mild COPD showed increases in weight and BMI, whereas those with a more severe form of the disease showed reductions.


Keywords: Pulmonary disease, chronic obstructive; Body mass index; Obesity; Waist circumference.


10 - Trends in morbidity and mortality from COPD in Brazil, 2000 to 2016

Tendências da morbidade e mortalidade da DPOC no Brasil, de 2000 a 2016

Liana Gonçalves-Macedo1,a, Eliana Mattos Lacerda2,b, Brivaldo Markman-Filho3,c, Fernando Luiz Cavalcanti Lundgren1,d, Carlos Feitosa Luna4,e

J Bras Pneumol.2019;45(6):e20180402

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Objective: To examine the trends in overall COPD mortality, as well as trends in in-hospital morbidity and mortality due to COPD, in Brazil, and to validate predictive models. Methods: This was a population-based study with a time-series analysis of cause-specific morbidity and mortality data for individuals ≥ 40 years of age, obtained from national health information systems for the 2000-2016 period. Morbidity and mortality rates, stratified by gender and age group, were calculated for the same period. We used regression analyses to examine the temporal trends and double exponential smoothing in our analysis of the predictive models for 2017. Results: Over the study period, COPD mortality rates trended downward in Brazil. For both genders, there was a downward trend in the southern, southeastern, and central-western regions. In-hospital morbidity rates declined in all regions, more so in the south and southeast. There were significant changes in the number of hospitalizations, length of hospital stay, and hospital expenses. The predictive models for 2017 showed error rates below 9% and were therefore validated. Conclusions: In Brazil, COPD age-adjusted mortality rates have declined in regions with higher socioeconomic indices, where there has been an even sharper decrease in all in-hospital morbidity and mortality variables. In addition to factors such as better treatment adherence and reduced smoking rates, socioeconomic factors appear to be involved in controlling COPD morbidity and mortality. The predictive models estimated here might also facilitate decision making and the planning of health policies aimed at treating COPD.


Keywords: Pulmonary disease, chronic obstructive/mortality; Pulmonary disease, chronic obstructive/epidemiology; Socioeconomic factors.


11 - Pulmonary function and functional capacity cut-off point to establish sarcopenia and dynapenia in patients with COPD

Pontos de corte da função pulmonar e capacidade funcional determinantes para sarcopenia e dinapenia em pacientes com DPOC

Kamila Mohammad Kamal Mansour1,a, Cássia da Luz Goulart2,b, Luiz Carlos Soares de Carvalho-Junior2,c, Renata Trimer3,d, Audrey Borghi-Silva2,e, Andréa Lúcia Gonçalves da Silva3,4,f

J Bras Pneumol.2019;45(6):e20180252

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Objective: To establish a cut-off point for clinical and functional variables to determinate sarcopenia and dynapenia in COPD patients, and to analyze the impact of skeletal muscle dysfunction (SMD) on these variables. Methods: Cross-sectional study, screened COPD patients for sarcopenia or dynapenia through low muscle mass and hand grip strength (HGS). Clinical variables: pulmonary function, respiratory muscle strength and functional capacity (FC). The precision of the variables in determining points of predictive cut-off for sarcopenia or dynapenia were performed using the Receiver Operating Characteristic curve and two-way analysis of variance. Results: 20 COPD patients stratified for sarcopenia (n = 11) and dynapenia (n = 07). Sarcopenia group presented lower lean mass and lower maximal inspiratory pressure (MIP), decreased HGS, reduced FC (p<0.050). Dynapenia group presented reduced MIP, lower HGS and walked a shorter distance at Incremental shuttle walk test (ISWT) (p<0.050). We found cut-off points of forced expiratory volume in one second (FEV1), MIP and maximal expiratory pressure (MEP) and ISWT. It is possible to identify sarcopenia or dynapenia in these patients. We found the coexistence of the conditions (SMD effect) in COPD - reduction in the distance in the ISWT (p = 0.002) and %ISWT (p = 0.017). Conclusion: In moderate to very severe COPD patients the sarcopenia could be predicted by FEV1 (%predicted) < 52, MIP < 73 cmH2O, MEP < 126 cmH2O and distance traveled of < 295 m in ISWT. Whereas dynapenia could be predicted by FEV1 < 40%, MIP < 71 cmH2O, MEP < 110 cmH2O and distance of < 230 m traveled in ISWT.


Keywords: Sarcopenia; Chronc obstructive pulmonary disease; Musculoskeletal system.


12 - Cross-cultural adaptation of the Cambridge Pulmonary Hypertension Outcome Review for use in patients with pulmonary hypertension in Colombia

Adaptación transcultural de la escala Cambridge Pulmonary Hypertension Outcome Review en pacientes con hipertensión pulmonar en Colombia

Claudio Villaquirán1,2,a, Socorro Moreno3,b, Rubén Dueñas4,c, Paola Acuña5,d, Juan Ricardo Lutz2,e, Jeanette Wilburn6,f, Alice Heaney6,g

J Bras Pneumol.2019;45(6):e20180332

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Objective: To conduct a cross-cultural adaptation of the Cambridge Pulmonary Hypertension Outcome Review (CAMPHOR) as an instrument to evaluate the perception of symptoms, functional limitation, and health-related quality of life (HRQoL) in subjects diagnosed with pulmonary arterial hypertension (PAH) or chronic thromboembolic pulmonary hypertension (CTEPH) in Colombia. Methods: The adaptation process involved 3 phases: translation, cognitive debriefing interviews, and a validation survey. To evaluate the psychometric properties, we recruited individuals ≥ 18 years of age who had been diagnosed with PAH or CTEPH to take part in the latter two stages of the adaptation process. All individuals were being followed on an outpatient basis by the pulmonary hypertension programs at Hospital Universitario San Ignacio, Fundación Clínica Shaio,and Clínicos IPS, all located in the city of Bogotá, Colombia. Results: A Spanish-language version of the CAMPHOR was developed for use in Colombia. The internal consistency was excellent for the symptoms, functioning, and quality of life scales (Cronbach's alpha coefficients of 0.92, 0.87, and 0.93, respectively). Test-retest reliability was above 0.70. The evaluation of the convergent validity and known group validity of the CAMPHOR scales confirmed that there were moderate and strong correlations with the related constructs of the Medical Outcomes Study 36-item Short-Form Health Survey, version 2, as well as showing their capacity to discriminate disease severity. Conclusions: The Spanish-language version of the CAMPHOR developed for use in Colombia was the result of a translation and cultural adaptation process that allows us to consider it equivalent to the original version, having shown good psychometric properties in the study sample. Therefore, its use to assess the impact of interventions on the HRQoL of patients with PAH or CTEPH is recommended, in research and clinical practice.


Keywords: Quality of life; Hypertension, pulmonary; Pulmonary embolism; Psychometrics.


13 - Respiratory muscle strength and lung function in the stages of Parkinson's disease

Força muscular respiratória e função pulmonar nos estágios da doença de Parkinson

Rejane Barreto dos Santos1,a, Anderson Santos Fraga1,b, Maria das Graças Wanderley de Sales Coriolano1,c, Bruna Ferreira Tiburtino1,d, Otávio Gomes Lins1,e, Ana Cristina Falcão Esteves1,f, Nadja Maria Jorge Asano1,g

J Bras Pneumol.2019;45(6):e20180148

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Objective: To investigate parameters of lung function and respiratory muscle strength in different stages of Parkinson's disease (PD), as well as to determine their correlation with motor function and quality of life. Methods: This was a cross-sectional study conducted at a referral center for PD in the city of Recife, Brazil. Respiratory muscle strength and lung function, as well as their relationship with motor function and quality of life, were evaluated in patients with PD, stratified by the level of severity, and were compared with the data obtained for a control group. After confirming the normality of data distribution, we performed one-way ANOVA with a post hoc t-test. Results: The sample comprised 66 individuals, in two groups: PD (n = 49) and control (n = 17). All of the parameters investigated showed inverse correlations with PD severity, and there were significant differences among the levels of severity, as well as between the PD and control groups, in terms of the MIP, MEP, FVC, FEV1, and FEF25-75%. The lung function parameters also showed moderate to weak inverse correlations with bradykinesia and rigidity. On a quality of life questionnaire, the total score and mobility domain score both presented a moderate inverse correlation with FVC, FEV1, PEF, and MEP. Conclusions: Respiratory muscle strength and some lung function parameters are impaired from the early stages of PD onward, bradykinesia and rigidity being the cardinal signs that correlate most strongly with impairment of those parameters. Such alterations negatively affect the quality of life of patients with PD.


Keywords: Parkinson disease; Respiratory mechanics; Maximum respiratory pressures; Quality of life.


14 - Effects of a high-intensity pulmonary rehabilitation program on the minute ventilation/carbon dioxide output slope during exercise in a cohort of patients with COPD undergoing lung resection for non-small cell lung cancer

Efeitos de um programa de reabilitação de alta intensidade no comando VE/VCO2 durante exercício em um grupo de pacientes submetidos à ressecção para câncer de pulmão de células não pequenas

Fabio Perrotta1,a, Antonio Cennamo2,b, Francesco Saverio Cerqua2,c, Francesco Stefanelli3,d, Andrea Bianco2,e, Salvatore Musella3,f, Marco Rispoli4,g, Rosario Salvi5,h, Ilemando Meoli3,i

J Bras Pneumol.2019;45(6):e20180132

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Objective: Preoperative functional evaluation is central to optimizing the identification of patients with non-small cell lung cancer (NSCLC) who are candidates for surgery. The minute ventilation/carbon dioxide output (VE/VCO2) slope has proven to be a predictor of surgical complications and mortality. Pulmonary rehabilitation programs (PRPs) could influence short-term outcomes in patients with COPD undergoing lung resection. Our objective was to evaluate the effects of a PRP on the VE/VCO2 slope in a cohort of patients with COPD undergoing lung resection for NSCLC. Methods: We retrospectively evaluated 25 consecutive patients with COPD participating in a three-week high-intensity PRP prior to undergoing lung surgery for NSCLC, between December of 2015 and January of 2017. Patients underwent complete functional assessment, including spirometry, DLCO measurement, and cardiopulmonary exercise testing. Results: There were no significant differences between the mean pre- and post-PRP values (% of predicted) for FEV1 (61.5 ± 22.0% vs. 62.0 ± 21.1%) and DLCO (67.2 ± 18.1% vs. 67.5 ± 13.2%). Conversely, there were significant improvements in the mean peak oxygen uptake (from 14.7 ± 2.5 to 18.2 ± 2.7 mL/kg per min; p < 0.001) and VE/VCO2 slope (from 32.0 ± 2.8 to 30.1 ± 4.0; p < 0.01). Conclusions: Our results indicate that a high-intensity PRP can improve ventilatory efficiency in patients with COPD undergoing lung resection for NSCLC. Further comprehensive prospective studies are required to corroborate these preliminary results.


Keywords: Carcinoma, non-small-cell lung; Pulmonary disease, chronic obstructive/rehabilitation; Carbon dioxide/metabolism; Oxygen consumption/physiology; Risk assessment.


15 - Mortality and costs of pneumococcal pneumonia in adults: a cross-sectional study

Mortalidade e custos da pneumonia pneumocócica em adultos: um estudo transversal

Lessandra Michelin1,a, Fernanda M. Weber1,b, Bruna W. Scolari2,c, Bruna K. Menezes1,d, Maria Carolina Gullo3,e

J Bras Pneumol.2019;45(6):e20180374

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Objective: Pneumococcal pneumonia is a significant cause of morbidity and mortality among adults. The study's main aim was to evaluate the in-hospital mortality and related costs of community-acquired pneumococcal pneumonia in adults. Methods: This cross‑sectional study used medical records of adult patients with pneumococcal pneumonia hospitalized in a university hospital in Brazil from October 2009 to April 2017. All patients aged ≥ 18 years diagnosed with pneumococcal pneumonia were included. Risk factors, intensive care unit admission, length of hospital stay, in-hospital mortality, and direct and indirect costs were analyzed. Results: In total, 186 patients were selected. The mean in-hospital mortality rate was 18% for adults aged < 65 years and 23% for the elderly (≥ 65 years). Bacteremic pneumococcal pneumonia affected 20% of patients in both groups, mainly through chronic respiratory disease (adjusted OR: 3.07, 95% CI: 1.23-7.65, p < 0.01). Over 7 years, annual total direct and indirect costs were USD 28,188 for adults < 65 years (USD 1,746 per capita) and USD 16,350 for the elderly (USD 2,119 per capita). Conclusion: Pneumococcal pneumonia remains an important cause of morbidity and mortality among adults, significantly affecting direct and indirect costs. These results suggest the need for prevention strategies for all adults, especially for patients with chronic respiratory diseases.


Keywords: Pneumococcus; Pneumococcal disease; Pneumonia; Hospital costs; Mortality.


16 - Diagnosis and treatment of latent tuberculosis infection in patients undergoing treatment with immunobiologic agents: a four-year experience in an endemic area

Impacto do diagnóstico e tratamento de tuberculose latente em pacientes submetidos à terapia imunobiológica: experiência de quatro anos em área endêmica

Diana Maria de Almeida Lopes1,a, Valéria Goes Ferreira Pinheiro2,b, Helena Serra Azul Monteiro1,c

J Bras Pneumol.2019;45(6):e20180225

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Objective: To describe the incidence of active tuberculosis and the occurrence of adverse events after isoniazid treatment in patients with latent tuberculosis infection (LTBI) who also had chronic inflammatory diseases and were treated with immunobiologic agents in an endemic area in Brazil. Methods: The diagnosis of LTBI was based on anamnesis, clinical examination, chest X-ray, and a tuberculin skin test (TST). Patients received prophylactic treatment (isoniazid for six months) in accordance with the Brazilian guidelines. Results: A total of 101 patients were evaluated between July of 2011 and July of 2015. Of those, 55 (54.46%) were women (mean age, 53.16 ± 1.76 years) and 46 (45.54%) were men (mean age, 45.39 ± 2.13 years). A total of 79 patients (78.22%) were being treated with immunobiologic agents and 22 (21.78%) were being treated with immunomodulatory or immunosuppressive agents. In the screening for LTBI, 53 patients (52.48%) had a TST induration ≥ 10 mm. Chest X-ray findings consistent with LTBI were observed in 36 patients (35.64%). Isoniazid preventive therapy was effective in 96 (95.05%) of the 101 patients evaluated. It is of note that 84 (83.17%) of the patients experienced no adverse effects from the use of isoniazid and that 83 (98.81%) of those patients completed the prophylactic treatment (p = 0.002). Active tuberculosis was diagnosed in 5 (6.33%) of the 79 patients treated with immunobiologic agents and in 1 (4.55%) of the 22 patients treated with other immunomodulators/immunosuppressants. Conclusions: A six-month course of isoniazid proved to be safe and effective in the treatment of LTBI, which is essential to reducing the risk of developing active tuberculosis.


Keywords: Latent tuberculosis; Tuberculin test; Tumor necrosis factors/antagonists & inhibitors; Isoniazid.


Special Article

17 - Exploratory analysis of requests for authorization to dispense high-cost medication to COPD patients: the São Paulo

Análise exploratória de solicitações de autorização para dispensação de medicação de alto custo para portadores de DPOC:

Regina Maria Carvalho-Pinto11,a, Ingredy Tavares da Silva1,2,b, Lucas Yoshio Kido Navacchia1,c, Flavia Munhos Granja1,2,d, Gustavo Garcia Marques1,2,e, Telma de Cassia dos Santos Nery1,f, Frederico Leon Arrabal Fernandes1,g, Alberto Cukier1,h, Rafael Stelmach1,i

J Bras Pneumol.2019;45(6):e20180355

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Objective: A resolution passed by the government of the Brazilian state of São Paulo established a protocol for requesting free COPD medications, including tiotropium bromide, creating regional authorization centers to evaluate and approve such requests, given the high cost of those medications. Our objective was to analyze the requests received by an authorization center that serves cities in the greater metropolitan area of (the city of) São Paulo between 2011 and 2016. Methods: Data regarding the authorization, return, or rejection of the requests were compiled and analyzed in order to explain those outcomes. Subsequently, the clinical and functional data related to the patients were evaluated. Results: A total of 7,762 requests for dispensing COPD medication were analyzed. Requests related to male patients predominated. Among the corresponding patients, the mean age was 66 years, 12% were smokers, 88% had frequent exacerbations, and 84% had severe/very severe dyspnea. The mean FEV1 was 37.2% of the predicted value. The total number of requests decreased by 24.5% from 2012 to 2013 and was lowest in 2015. Most (65%) of the requests were accepted. The main reasons for the rejection/return of a request were a post-bronchodilator FEV1/FVC ratio > 0.7, a post-bronchodilator FEV1 > 50% of the predicted value, and failure to provide information regarding previous use of a long-acting β2 agonist. During the study period, the total number of requests returned/rejected decreased slightly, and there was improvement in the quality of the data included on the forms. Conclusions: Here, we have identified the characteristics of the requests for COPD medications and of the corresponding patients per region served by the authorization center analyzed, thus contributing to the improvement of local public health care measures.


Keywords: Pulmonary disease, chronic obstructive; Clinical protocols; Drug costs; Tiotropium bromide.


Systematic Reviews and Meta-analyses

18 - Intensity of physical exercise and its effect on functional capacity in COPD: systematic review and meta-analysis

Diferentes intensidades de exercício físico e capacidade funcional na DPOC: revisão sistemática e meta-análise

Juliano Rodrigues Adolfo1,a, William Dhein1,b, Graciele Sbruzzi1,2,3,c

J Bras Pneumol.2019;45(6):e20180011

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Objective: To evaluate the effects of high-intensity interval training (HIIT), in comparison with those of continuous exercise, on functional capacity and cardiovascular variables in patients with COPD, through a systematic review and meta-analysis of randomized controlled trials. Methods: We searched PubMed, the Physiotherapy Evidence Database, the Cochrane Central Register of Controlled Trials, and EMBASE, as well as performing hand searches, for articles published up through January of 2017. We included studies comparing exercise regimens of different intensities, in terms of their effects on functional capacity and cardiovascular variables in patients with COPD. Results: Of the 78 articles identified, 6 were included in the systematic review and meta-analysis. Maximal oxygen consumption (VO2max) did not differ significantly between HIIT and control interventions. That was true for relative VO2max (0.03 mL/kg/min; 95% CI: −3.05 to 3.10) and absolute VO2max (0.03 L/min, 95% CI: −0.02 to 0.08). Conclusions: The effects of HIIT appear to be comparable to those of continuous exercise in relation to functional and cardiovascular responses. However, our findings should be interpreted with caution because the studies evaluated present a high risk of bias, which could have a direct influence on the results.


Keywords: Pulmonary disease, chronic obstructive; Exercise; Oxygen consumption.


Letters to the Editor

19 - Discordance between old and new criteria for stratifying patients with COPD

Discordância de critérios novos e antigos de classificação de pacientes com DPOC

António Manuel Silva Duarte de Araújo1,2,3,a, Pedro Teixeira1,2,b, Venceslau Hespanhol4,5,c, Jaime Correia-de-Sousa1,2,6,d

J Bras Pneumol.2019;45(6):e20190183

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20 - Gastric pseudo-obstruction as an initial manifestation of thymoma

Pseudo-obstrução gástrica como manifestação inicial de timoma

Erlon de Ávila Carvalho1,a, André Rossetti Portela1,b, Marina Varela Braga de Oliveira1,c, Jéssica Rodrigues Girundi Guimarães1,d, Shaline Braga Ramos1,e, Thamilys Benfica Pena1,f

J Bras Pneumol.2019;45(6):e20190081

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23 - Lung ultrasound assessment of response to antibiotic therapy in cystic fibrosis exacerbations: a study of two cases

Avaliação da resposta à antibioticoterapia durante exacerbação na fibrose cística por ultrassom pulmonar: estudo de dois casos

Andressa Oliveira Peixoto1,2,3,a, Fernando Augusto Lima Marson1,2,4,5,b, Tiago Henrique Souza1,6,c, Andrea de Melo Alexandre Fraga1,3,d, José Dirceu Ribeiro1,3,e

J Bras Pneumol.2019;45(6):e20190128

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