Exercise Performance as a Predictor for Balance Impairment in COPD Patients

Background and objective: Six-minute walk test (6-MWT) is a widely used test for assessing exercise performance in chronic obstructive pulmonary (COPD). However, the association between reduced walking distance and balance impairment in COPD has not been directly investigated. Therefore, the aim of this study was to identify exercise performance as a predictor for balance impairment in COPD. Materials and Methods: The cross-sectional study was conducted at a single visit involving stable COPD patients in Maharaj Nakorn Chiang Mai Hospital, Chiang Mai, Thailand from November 2015 to October 2017. The 6-MWT was measured for in all subjects. The prognostic confounding factors were also collected for all subjects. Balance test was measured using the Berg Balance Scale (BBS) and the Timed Up and Go (TUG) test. A cut-off score of BBS < 46 and/or the TUG ≥ 13.5 s was classified as balance impairment. Multivariable logistic regressions were performed to identify the six-minute walk distance (6-MWD) as a predictor for balance impairment in COPD. Results: Of the 176 COPD subjects assessed for eligibility, 118 COPD patients were enrolled including 86 males (72.9%) with a mean age of 73.5 ± 8.1 years. Thirty-three (28.0%) cases were classified with a balance impairment. The 6-MWD < 300 m was the predictor of balance impairment in COPD with an adjusted risk ratio of 10.10 (95%CI; 2.87, 35.61, p-value < 0.001). Conclusions: The 6-MWT is not only useful for evaluation of exercise performance, but also for prediction of balance impairment in patients with COPD. Our study suggests that the 6-MWD < 300 m is an important risk factor for balance impairment in COPD.

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Six-Minute Walk Test and its Correlation with Spirometry in Stable COPD Patients

Journal of Health and Allied Sciences NU ◽

10.1055/s-0041-1740331 ◽

2021 ◽

Author(s):

B. Sai Krishna ◽

Amrut Kumar Mohapatra ◽

Debasis Behera ◽

Suman Kumar Jagaty ◽

Saswat Subhankar ◽

...

Keyword(s):

Statistical Analysis ◽

Negative Correlation ◽

Significant Negative Correlation ◽

Chronic Obstructive ◽

P Value ◽

Walk Test ◽

Predisposing Factor ◽

Obstructive Pulmonary Disease ◽

Copd Patients ◽

Minute Walk

Abstract Objectives An impaired exercise tolerance, the main feature in chronic obstructive pulmonary disease (COPD), occurs due to multiple factors. The 6-minute walk test (6MWT) is easy to perform, well-tolerated, and more reflective of activities of daily living. The facility of spirometry is unavailable in many areas of India, where 6MWT can be done easily. This study aims to compare the six-minute walk distance (6MWD) with various demographic, clinical, and spirometry parameters. Materials and Methods A total of 118 consecutive stable COPD patients fitting the criteria were included in the study. Spirometry was performed in these patients before and after giving a short-acting bronchodilator. 6MWT was performed according to the ATS guidelines. All patients underwent the 6MWT after 10 minutes of spirometry. Statistical analysis was done using GraphPad calculator and SPSS 24.0. Statistical Analysis All data were clubbed together in a single Excel chart. Statistical analysis was done using SPSS 24.0. Descriptive data are presented as mean ± standard deviation (SD). Qualitative data are presented as a percentage. Analysis of variance (ANOVA) was used to compare between means. The linear regression model was used to compare between variables. A p-value less than 0.05 was considered significant. Results The majority of the patients were > 60 years of age (mean age = 62.99 ± 6.68 years) and comprised males and females in the ratio 5.9:1. Smoking was determined to be the most important predisposing factor for the development of COPD. There was a significant negative correlation between 6MWD, age, and smoking index (p = 0.0075 and 0.0295 respectively). The 6MWD showed a significant positive correlation with FEV1 (in liters), FEV1 (%), FVC (in liters), and FVC (%). The 6MWD (meters) and % predicted 6MWD showed a significant negative correlation with a drop in SpO2 after the 6MWT (r = –0.36; p = 0.000769, r = –0.3; p = 0.004, respectively). Conclusion 6MWT can be used in cases of COPD where spirometry is unavailable as it correlates significantly with various parameters of the latter.

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Exercise performance and differences in physiological response to pulmonary rehabilitation in severe chronic obstructive pulmonary disease with hyperinflation

Jornal Brasileiro de Pneumologia ◽

10.1590/s1806-37562015000000078 ◽

2016 ◽

Vol 42 (2) ◽

pp. 121-129 ◽

Cited By ~ 8

Author(s):

André Luis Pereira de Albuquerque ◽

Marco Quaranta ◽

Biswajit Chakrabarti ◽

Andrea Aliverti ◽

Peter M. Calverley

Keyword(s):

Oxygen Consumption ◽

Chest Wall ◽

Exercise Performance ◽

Pulmonary Rehabilitation ◽

Treatment Success ◽

Chronic Obstructive ◽

Respiratory Drive ◽

Copd Patients ◽

The Impact ◽

Minute Walk

Objective: Pulmonary rehabilitation (PR) improves exercise capacity in most but not all COPD patients. The factors associated with treatment success and the role of chest wall mechanics remain unclear. We investigated the impact of PR on exercise performance in COPD with severe hyperinflation. Methods: We evaluated 22 COPD patients (age, 66 ± 7 years; FEV1 = 37.1 ± 11.8% of predicted) who underwent eight weeks of aerobic exercise and strength training. Before and after PR, each patient also performed a six-minute walk test and an incremental cycle ergometer test. During the latter, we measured chest wall volumes (total and compartmental, by optoelectronic plethysmography) and determined maximal workloads. Results: We observed significant differences between the pre- and post-PR means for six-minute walk distance (305 ± 78 vs. 330 ± 96 m, p < 0.001) and maximal workload (33 ± 21 vs. 39 ± 20 W; p = 0.02). At equivalent workload settings, PR led to lower oxygen consumption, carbon dioxide production (VCO2), and minute ventilation. The inspiratory (operating) rib cage volume decreased significantly after PR. There were 6 patients in whom PR did not increase the maximal workload. After PR, those patients showed no significant decrease in VCO2 during exercise, had higher end-expiratory chest wall volumes with a more rapid shallow breathing pattern, and continued to experience symptomatic leg fatigue. Conclusions: In severe COPD, PR appears to improve oxygen consumption and reduce VCO2, with a commensurate decrease in respiratory drive, changes reflected in the operating chest wall volumes. Patients with severe post-exercise hyperinflation and leg fatigue might be unable to improve their maximal performance despite completing a PR program.

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Comparison between 20 and 30 meters in walkway length affecting the 6-minute walk test in patients with chronic obstructive pulmonary disease: A randomized crossover study

PLoS ONE ◽

10.1371/journal.pone.0262238 ◽

2022 ◽

Vol 17 (1) ◽

pp. e0262238

Author(s):

Narongkorn Saiphoklang ◽

Apiwat Pugongchai ◽

Kanyada Leelasittikul

Keyword(s):

Chronic Obstructive Pulmonary Disease ◽

Crossover Study ◽

Walking Distance ◽

Chronic Obstructive ◽

Walk Test ◽

Obstructive Pulmonary Disease ◽

Copd Patients ◽

6 Minute Walk Test ◽

Randomized Crossover Study ◽

Minute Walk

Background A 30-m walkway length for the 6-minute walk test (6MWT) is the standard recommendation established by the American Thoracic Society to assess patients with chronic obstructive pulmonary disease (COPD). This study aimed to compare between the distances of 20 and 30 m long corridor affecting 6MWT in COPD patients. Methods A randomized crossover study was conducted with patients. COPD patients were randomized 1:1 to either a 20-m or a 30-m walkway in the first test, then switched to the other in the second test. Physiologic parameters and 6-minute walking distance (6MWD) were recorded. Results Fifty subjects (92% men) were included: age 69.1±7.4 years, body mass index 22.9±5.5 kg/m2, FEV1 63.0±21.3%, and 50% having cardiovascular disease. The 6MWD in a 20-m and a 30-m walkway were 337.82±71.80 m and 359.85±77.25 m, respectively (P<0.001). Mean distance difference was 22.03 m (95% CI -28.29 to -15.76, P<0.001). Patients with a 20-m walkway had more turns than those with a 30-m walkway (mean difference of 4.88 turns, 95% CI 4.48 to 5.28, P<0.001). Also, higher systolic blood pressure was found in patients with a 20-m walkway after 6MWT (4.62 mmHg, P = 0.019). Other parameters and Borg dyspnea scale did not differ. Conclusions The walkway length had significant effect on walking distance in COPD patients. A 30-m walkway length should still be recommended in 6MWT for COPD assessment. Clinical trial registration Clinicaltrials.in.th number: TCTR20200206003.

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Inspiratory muscle strength in chronic obstructive pulmonary disease depending on disease severity

Clinical Science ◽

10.1042/cs20060362 ◽

2007 ◽

Vol 113 (5) ◽

pp. 243-249 ◽

Cited By ~ 18

Author(s):

Hans-Joachim Kabitz ◽

Stephan Walterspacher ◽

David Walker ◽

Wolfram Windisch

Keyword(s):

Chronic Obstructive Pulmonary Disease ◽

Muscle Strength ◽

Pulmonary Disease ◽

Disease Severity ◽

Inspiratory Muscle ◽

Walking Distance ◽

Chronic Obstructive ◽

Obstructive Pulmonary Disease ◽

Copd Patients ◽

Inspiratory Muscle Strength

Staging criteria for COPD (chronic obstructive pulmonary disease) include symptoms and lung function parameters, but the role of reduced inspiratory muscle strength related to disease severity remains unclear. Therefore the present study tested whether inspiratory muscle strength is reduced in COPD and is related to disease severity according to GOLD (Global Initiative for Chronic Obstructive Lung Disease) criteria and assessed its clinical impact. PImax (maximal inspiratory mouth occlusion pressure), SnPna (sniff nasal pressure) and TwPmo (twitch mouth pressure) following bilateral anterior magnetic phrenic nerve stimulation were assessed in 33 COPD patients (8 GOLD0, 6 GOLDI, 6 GOLDII, 7 GOLDIII and 6 GOLDIV) and in 28 matched controls. Furthermore, all participants performed a standardized 6 min walking test. In comparison with controls, PImax (11.6±2.5 compared with 7.3±3.0 kPa; P<0.001), SnPna (9.7±2.5 compared with 6.9±3.3 kPa; P<0.001) and TwPmo (1.6±0.6 compared with 0.8±0.4 kPa; P<0.001) were markedly lower in COPD patients. TwPmo decreased with increasing COPD stage. TwPmo was correlated with walking distance (r=0.75; P<0.001), dyspnoea (r=−0.61; P<0.001) and blood gas values following exercise (r>0.57; P<0.001). Inspiratory muscle strength, as reliably assessed by TwPmo, decreased with increasing severity of COPD and should be considered as an important factor in rating disease severity and to reflect burden in COPD.

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A COMPARATIVE STUDY OF ABG PATTERN IN PATIENTS OF COPD WITH OR WITHOUT COR PULMONALE

10.36106/ijsr/9125383 ◽

2021 ◽

pp. 64-66

Author(s):

Md Shoeb Alam ◽

Rahul Ranjan ◽

V N Jha

Keyword(s):

Hypoxic Pulmonary Vasoconstriction ◽

Respiratory Acidosis ◽

Public Health Problem ◽

Cor Pulmonale ◽

Chronic Obstructive ◽

P Value ◽

Major Public Health Problem ◽

Close Monitoring ◽

Obstructive Pulmonary Disease ◽

Copd Patients

INTRODUCTION: Chronic obstructive pulmonary disease (COPD) is a major public health problem. COR PULMONALE describes the enlargement and failure of the right ventricle of the heart as a response to increased vascular resistance or increased pulmonary artery pressure. Hypoxic pulmonary vasoconstriction, hypercapnia, respiratory acidosis and pulmonary vascular remodeling in COPD can cause an increase in right ventricular (RV) after load, which in turn, results in RVfailure leading to COR PULMONALE AIM:The purpose of the study is to compare the ABG pattern in patients of COPD with or without COR PULMONALE. MATERIALS AND METHODS: This prospective observational study was conducted in the Department of Medicine of DMCH, Laheriasarai, Bihar. The study was conducted with duration of 2 years. Atotal of 100 patients admitted as a case of COPD with or without COR PULMONALE. The patients were put into two subgroups, COPD with and without COR PULMONALE. RESULT: The mean duration was 10.17 years and 9.20 years respectively in patients with and without COR PULMONALE. There was no statistically signicant difference regarding mean duration of disease (p value =0.304). Mean CAT score was 16.59 ± 6.26 and mean mMRC was 3.19± 0.45 in COPD patients with COR PULMONALE group. Mean CAT score was 14.06 ± 4.46 and mean mMRC was 3.10 ± 0.44 in COPD patients without COR PULMONALE group. We found no signicant difference among these variables between groups. Although COR PULMONALE patients had higher CATscore and mMRC score, the difference was not signicant (p value = >0.05). CONCLUSION:ABG ANALYSIS should be recommended for all patients of COPD with or without COR PULMONALE to assess the degree of hypoxemia, hypercapnea, respiratory acidosis and also, we can identify individuals who need more close monitoring and intensive treatment.

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A krónikus obstruktív tüdőbetegség metabolikus következményei

Orvosi Hetilap ◽

10.1556/650.2021.31984 ◽

2021 ◽

Vol 162 (5) ◽

pp. 185-191

Author(s):

Mónika Fekete ◽

Vince Fazekas-Pongor ◽

Gergő Szőllősi ◽

János Tamás Varga

Keyword(s):

Quality Of Life ◽

Metabolic Syndrome ◽

Lung Function ◽

Smoking Status ◽

International Diabetes Federation ◽

Walking Distance ◽

Chronic Obstructive ◽

Copd Patients ◽

Co Morbidity

Összefoglaló. Bevezetés: Krónikus obstruktív tüdőbetegségben (COPD) az obesitas mellett a csökkent fizikai aktivitás nagymértékben fokozza a metabolikus szindróma kialakulásának valószínűségét. Célkitűzés: Kutatásunk célja volt felmérni a metabolikus szindróma prevalenciáját COPD-ben, valamint azt, hogy milyen mértékben függ össze az életkorral, a nemmel, a társbetegségekkel, a tüdőfunkció károsodásának mértékével, a tápláltsági állapottal, a fizikai terhelhetőséggel és az életminőséggel. Módszer: Keresztmetszeti vizsgálatot végeztünk az Országos Korányi Pulmonológiai Intézet Légzésrehabilitációs Osztályán fekvő betegek körében 2019. július 1. és december 31. között. A véletlenszerűen kiválasztott 300, 40 év feletti betegnek ismertük az antropometriai, légzésfunkciós vizsgálati eredményét és laboratóriumi paramétereit. Adatokat gyűjtöttünk a dohányzási szokásokról, az előző évi exacerbatiók számáról és a kortikoszteroidok használatáról is. Az életminőség mérésére a betegségspecifikus Szent György-féle Légzési Kérdőív magyar nyelvre validált változatát használtuk. A metabolikus szindrómát a Nemzetközi Diabetes Szövetség kritériumai alapján határoztuk meg. Eredmények: A metabolikus szindróma a betegek 72%-ánál fordult elő, férfi: 65,9% nő: 77,2% (p = 0,031). A metabolikus szindrómás betegek esetében rövidebb 6 perces sétatávolságot mértünk ([m] 250 [150–330] vs. 295 [162–360]; p = 0,384), és szignifikánsan több volt az előző évi exacerbatiók száma (3 [0–6] vs. 1 [1–2]; p<0,001) a nem metabolikus szindrómás betegekhez képest. A BMI-re történő stratifikáció után a metabolikus szindróma jelenléte nagyobb volt BMI≥25 kg/m2 esetén. A hasi elhízás, a magas vérnyomás, a hyperlipidaemia és a hyperglykaemia szignifikánsan gyakoribb volt BMI≥25 kg/m2 esetén (p<0,001). Következtetés: Eredményeink azt sugallják, hogy a metabolikus szindrómás betegekben megnő az együttes morbiditási index, különösen azok körében, akik túlsúlyosak vagy elhízottak. Ezért a COPD-s betegekben nagyon fontos időben felismerni és megfelelően kezelni a metabolikus szindrómát. Orv Hetil. 2021; 162(5): 185–191. Summary. Introduction: Both obesity and the lack of physical activity among chronic obstructive pulmonary disease (COPD) patients increase the risk of developing metabolic syndrome. Objective: The goal of our study was to assess the prevalence of metabolic syndrome among COPD patients and to examine its correlation with age, gender, comorbidities, lung function values, nutritional status, exercise capacity, and quality of life. Method: A cross-sectional study was performed at the Department of Pulmonary Rehabilitation of the Hungarian National Korányi Institute for Pulmonology between July 1st and December 31st, 2019. A total of 300 patients aged over 40 were selected at random. Anthropometric data were collected along with lung function values, laboratory parameters, smoking status, the number of exacerbations in the previous year, and the use of corticosteroids. Quality of life was measured by the validated Hungarian, COPD-specific Saint George Respiratory Questionnaire. Metabolic syndrome was defined according to the International Diabetes Federation criteria. Results: Metabolic syndrome affected 72% of COPD patients (male: 65.9%, female 77.2%; p = 0.031). In patients with metabolic syndrome, shorter 6-minute walking distance was measured ([m] 250 [150–330] vs. 295 [162–360]; p = 0.384) and the number of exacerbations in the previous year was significantly higher (3 [0–6] vs. 1 [1–2]; p<0.001) compared to patients with no metabolic syndrome. After stratification for BMI, metabolic syndrome was more frequent in the case of BMI≥25 kg/m2. Central adiposity, hypertension, hyperlipidemia, and hyperglycemia were also significantly more frequent among patients with BMI≥25 kg/m2 (p<0.001). Conclusion: Our results suggest that the co-morbidity index increases in patients with metabolic syndrome, especially in overweight or obese patients. Therefore, early detection and appropriate treatment of metabolic syndrome in patients with COPD is very important. Orv Hetil. 2021; 162(5): 185–191.

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Correlation of spirometry and six minute walk test in patients with chronic obstructive pulmonary disease from Sundargarh, Odisha, India

International Journal of Research in Medical Sciences ◽

10.18203/2320-6012.ijrms20195908 ◽

2019 ◽

Vol 8 (1) ◽

pp. 205

Author(s):

Yara Dinakar ◽

Pradeep Panchadi Kiran ◽

Akshaya K. Mohanty ◽

Praveen Kishore Sahu ◽

Anita Mohanty

Keyword(s):

Chronic Obstructive Pulmonary Disease ◽

Significant Positive Correlation ◽

Significant Negative Correlation ◽

Chronic Obstructive ◽

Walk Test ◽

Obstructive Pulmonary Disease ◽

Positive Correlation ◽

Six Minute Walk Test ◽

Copd Patients ◽

Minute Walk

Background: Six‑Minute Walk Test (6MWT) is a simple, objective, reproducible test which correlated well with different spirometric indices, and thus able to predict severity of Chronic Obstructive Pulmonary Disease (COPD) and can replace spirometry in resource poor set‑up. Here, author evaluated the correlation of 6 minute walk distance (6MWD) with spirometric indices in COPD patients and the potential of 6MWT as an alternative to the assessment of severity of COPD.Methods: This cross-sectional observational study included a total of 80 COPD patients, diagnosed by GOLD criteria (Post bronchodilator FEV1/ FVC ratio <0.7). Modified Medical Research Council (mMRC) grading was used (age, weight, height, body mass index- BMI and breathlessness) and all the patients underwent spirometric measurement of FEV1, FVC and FEV1/ FVC ratio and tests were repeated after bronchodilation using 200-400 μg of salbutamol. 6MWT was performed following American Thoracic Society (ATS) protocol of 6MWT and distance was measured in meters.Results: Author found significant negative correlation of 6MWT with age (r=-0.384, p=0.00) and mMRC grading of dyspnea (r=-0.559, p=0.00) and significant positive correlation with height (r=0.267, p=0.019) and weight (r=0.293, p=0.008). Significant positive correlation of 6MWD was noted with post bronchodilator FEV1(r=0.608, p=0.00), FEV1% (r=0.429, p=0.00), FVC (r=0.514 p=0.00), FVC% (r=0.313 p=0.005), FEV1/FVC % (r=0.336, p=0.001). Positive correlation was also observed between 6MWT and BMI but statistically insignificant (r=0.177, p=0.116). There was significant negative correlation between 6MWT and GOLD staging (r=-0.536, p=0.00).Conclusions: This finding concludes that 6MWT can be used for the assessment of severity of disease in COPD patients in places where spirometry is not available.

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Maintenance Negative Pressure Ventilation Improves Survival in COPD Patients with Exercise Desaturation

Journal of Clinical Medicine ◽

10.3390/jcm8040562 ◽

2019 ◽

Vol 8 (4) ◽

pp. 562

Author(s):

Hung-Yu Huang ◽

Chun-Yu Lo ◽

Lan-Yan Yang ◽

Fu-Tsai Chung ◽

Te-Fang Sheng ◽

...

Keyword(s):

Lung Function ◽

Negative Pressure ◽

Significant Risk ◽

Forced Expiratory Volume ◽

Walking Distance ◽

Chronic Obstructive ◽

Negative Pressure Ventilation ◽

Risk Of Death ◽

Copd Patients

Negative pressure ventilation (NPV), when used as an adjuvant to pulmonary rehabilitation, improves lung function, increases exercise capacity, and reduces exacerbations. The aim of this study was to determine whether maintenance NPV improves long-term clinical outcomes and reduces mortality in patients with chronic obstructive pulmonary disease (COPD). Between 2003 and 2009, 341 patients were treated for COPD either with or without hospital-based NPV. We measured forced expiratory volume in one second (FEV1), 6-min walking distance (6MWD), and oxygen saturation by pulse oximetry (SpO2) during a 6-min walk test (6MWT) every 3–6 months. Desaturation (D) during the 6MWT was defined as a reduction in SpO2 of ≥10% from baseline. The NPV group had a better survival outcome than the Non-NPV group. The 8-year survival probabilities for the NPV and Non-NPV groups were 60% and 20%, respectively (p < 0.01). Baseline desaturation was a significant risk factor for death, and the risk of death increased with desaturation severity (SpO2 80~89: hazard ratios (HR) 2.7, 95% confidence interval (CI) 1.4–5.3; SpO2 < 80: HR 3.1, 95% CI 1.3–7.4). The NPV group had a slower decline in lung function and 6MWD. The NPV + D and Non-NPV+D had a threefold and fourfold increase in the risks of all-cause mortality compared with the NPV-ND, respectively. Maintenance non-invasive NPV reduced long-term mortality in COPD patients. The desaturating COPD patients had an increased mortality risk compared with non-desaturating COPD patients.

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Comparison of Bronchodilator Effect of Salbutamol Delivered via MDI and DPI in COPD Patients

SAARC Journal of Tuberculosis Lung Diseases and HIV/AIDS ◽

10.3126/saarctb.v6i2.3054 ◽

1970 ◽

Vol 6 (2) ◽

pp. 22-30 ◽

Cited By ~ 2

Author(s):

R Shrestha ◽

R Shakya

Keyword(s):

Lung Function ◽

Smoking Habit ◽

Dry Powder Inhaler ◽

Smoking History ◽

Dose Inhaler ◽

Chronic Obstructive ◽

P Value ◽

Total N ◽

Copd Patients ◽

Significant Difference

Introduction : Chronic Obstructive Pulmonary Disease (COPD) is one of the leading problems affecting majority of population all over the world which diminishes the quality of life of the individual and create extra burden to the society as well as country. Inhaled bronchodilator therapy is the mainstay of treatment in the management of COPD. Various inhaled [e.g. metered dose inhaler (MDI) /dry powder inhaler (DPI)] formulations are available and are widely used among the COPD patients in Nepal. Methodology : This is cross sectional prospective study, designed to compare the bronchodilating effect produced when salbutamol is delivered via two devices: MDI (Asthalin® from Cipla) and DPI (Asthalin® rotacap delivered via Rotahaler® from Cipla), in patients with stable COPD. It is proven by previous studies that intervention is necessary to improve the compliance of the patients; all subjects (total n=60; 30 in each group) are counseled and trained to follow correct inhaling technique through particular device. Then their improvements in lung function were measured with reference to the pulmonary function test based on spirometry. Results : Patients enrolled in each group were not statistically different regarding to age (P=0.318), weight (P=0.324) & BMI (P=0.836). Among the total subjects 87% had smoking history and 2% were still smoking and there was no signifi cant difference in smoking habit between the two groups (p-value 0.544 > 0.05). Similarly 91.6 % of the total had exposure to indoor air pollution which had been the major risk factor for COPD. Most of the patients were on stage II COPD (62%). Salbutamol was found to have no effect on vital statistics of patients. Study showed there was no significant difference in the improvement of forced expiratory volume in one second (FEV1) (p=0.802), FVC (p= 0.693), FEV1 % (p=1) and PEF (p=0.448) between MDI and Rotahaler groups. Major side effect associated with the MDI users is headache (79%) while those among Rotahaler users were muscle cramps (79%). Even though intervention improved the inhaler using technique among the patients in both the groups, it was found even after counseling, DPI seemed to be better understood by the patients in comparison to MDI (p=0.003 & 0.00). In addition DPI was preferred by most of the patients who were familiar with both delivery systems. It was also found to be cheaper than the MDI. Conclusion : Overall evidence suggests that although both MDI & DPI improve the lung function of COPD patients to similar extent, DPI is cheaper and more preferred and can be easily handled by the patients which can result in reduction of non-compliance. Keyword : COPD; Salbutamol; DPI; MDI; Spirometry DOI: 10.3126/saarctb.v6i2.3054 SAARC J. Tuber. Lung Dis. HIV/AIDS 2009 VI (2) 22-30

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GPNMB contributes to a vicious circle for chronic obstructive pulmonary disease

Bioscience Reports ◽

10.1042/bsr20194459 ◽

2020 ◽

Vol 40 (6) ◽

Author(s):

Xi-Juan Zhang ◽

Zhong-Hua Cui ◽

Yan Dong ◽

Xiu-Wen Liang ◽

Yan-Xin Zhao ◽

...

Keyword(s):

Chronic Obstructive Pulmonary Disease ◽

Pulmonary Disease ◽

Large Scale ◽

Enrichment Analysis ◽

Gene Set Enrichment Analysis ◽

Chronic Obstructive ◽

P Value ◽

Obstructive Pulmonary Disease ◽

Copd Patients ◽

Size Population

Abstract Osteoporosis (OP) is significant and debilitating comorbidity of chronic obstructive pulmonary disease (COPD). We hypothesize that genetic variance identified with OP may also play roles in COPD. We have conducted a large-scale relation data analysis to explore the genes implicated with either OP or COPD, or both. Each gene linked to OP but not to COPD was further explored in a mega-analysis and partial mega-analysis of 15 independently collected COPD RNA expression datasets, followed by gene set enrichment analysis (GSEA) and literature-based pathway analysis to explore their functional linked to COPD. A multiple linear regression (MLR) model was built to study the possible influence of sample size, population region, and study date on the gene expression data in COPD. At the first step of the analysis, we have identified 918 genes associated with COPD, 581 with OP, and a significant overlap (P<2.30e-140; 210 overlapped genes). Partial mega-analysis showed that, one OP gene, GPNMB presented significantly increased expression in COPD patients (P-value = 0.0018; log fold change = 0.83). GPNMB was enriched in multiple COPD pathways and plays roles as a gene hub formulating multiple vicious COPD pathways included gene MMP9 and MYC. GPNMB could be a novel gene that plays roles in both COPD and OP. Partial mega-analysis is valuable in identify case-specific genes for COPD.

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