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Larsson K, Janson C, Lisspers K, Ställberg B, Johansson G, Gutzwiller FS, Mezzi K, Bjerregaard BK, Jorgensen L. The Impact of Exacerbation Frequency on Clinical and Economic Outcomes in Swedish COPD Patients: The ARCTIC Study. Int J Chron Obstruct Pulmon Dis 2021; 16:701-713. [PMID: 33776429 PMCID: PMC7987259 DOI: 10.2147/copd.s297943] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Accepted: 03/04/2021] [Indexed: 01/13/2023] Open
Abstract
Purpose The aim of this study was to assess the association between exacerbation frequency and clinical and economic outcomes in patients with COPD. Patients and Methods Electronic medical record data linked to National Health Registries were collected from COPD patients at 52 Swedish primary care centers (2000–2014). The outcomes analyzed were exacerbation rate, mortality, COPD treatments, lung function and healthcare costs during the follow-up period. Based on the exacerbation rate two years before index date, the patients were initially classified into three groups, either 0, 1 or ≥2 exacerbations per year. After the index date, the classification into exacerbation groups was updated each year based on the exacerbation rate during the last year of follow-up. A sensitivity analysis was conducted excluding patients with asthma diagnosis from the analysis. Results In total 18,586 COPD patients were analyzed. A majority of the patients (60–70%) who either have had no exacerbation or frequent exacerbations (≥2/year) during the pre-index period remained in their group (ie, with 0 or ≥2 annual exacerbations) during up to 11 years of follow-up. Compared with having no exacerbation, mortality was higher in patients having 1 (HR; 2.06 [1.93–2.20]) and ≥2 (4.58 [4.33–4.84]) exacerbations at any time during the follow-up. Lung function decline was more rapid in patients with frequent exacerbations and there was an almost linear relationship between exacerbations frequency and mortality. Total healthcare costs were higher in the frequent exacerbation group (≥2/year) than in patients with no or one exacerbation annually (p<0.0001 for both). The results did not differ from the main analysis after exclusion of patients with a concurrent asthma diagnosis. Conclusion In addition to faster lung function decline and increased mortality, frequent exacerbations in COPD patients imply a significant economic burden.
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Affiliation(s)
- Kjell Larsson
- Integrative Toxicology, The National Institute of Environmental Medicine, Karolinska Institute, Stockholm, Sweden
| | - Christer Janson
- Department of Medical Sciences: Respiratory, Allergy and Sleep Research, Uppsala University, Uppsala, Sweden
| | - Karin Lisspers
- Department of Public Health and Caring Sciences, Family Medicine and Preventive Medicine, Uppsala University, Uppsala, Sweden
| | - Björn Ställberg
- Department of Public Health and Caring Sciences, Family Medicine and Preventive Medicine, Uppsala University, Uppsala, Sweden
| | - Gunnar Johansson
- Department of Public Health and Caring Sciences, Family Medicine and Preventive Medicine, Uppsala University, Uppsala, Sweden
| | | | - Karen Mezzi
- Novartis Pharma AG, Global Patient Access, Basel, Switzerland
| | | | - Leif Jorgensen
- IQVIA Solutions, Real World Evidence Solutions, Copenhagen, Denmark
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van Agteren JEM, Hnin K, Grosser D, Carson KV, Smith BJ. Bronchoscopic lung volume reduction procedures for chronic obstructive pulmonary disease. Cochrane Database Syst Rev 2017; 2:CD012158. [PMID: 28230230 PMCID: PMC6464526 DOI: 10.1002/14651858.cd012158.pub2] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
BACKGROUND In the recent years, a variety of bronchoscopic lung volume reduction (BLVR) procedures have emerged that may provide a treatment option to participants suffering from moderate to severe chronic obstructive pulmonary disease (COPD). OBJECTIVES To assess the effects of BLVR on the short- and long-term health outcomes in participants with moderate to severe COPD and determine the effectiveness and cost-effectiveness of each individual technique. SEARCH METHODS Studies were identified from the Cochrane Airways Group Specialised Register (CAGR) and by handsearching of respiratory journals and meeting abstracts. All searches are current until 07 December 2016. SELECTION CRITERIA We included randomized controlled trials (RCTs). We included studies reported as full text, those published as abstract only and unpublished data, if available. DATA COLLECTION AND ANALYSIS Two independent review authors assessed studies for inclusion and extracted data. Where possible, data from more than one study were combined in a meta-analysis using RevMan 5 software. MAIN RESULTS AeriSealOne RCT of 95 participants found that AeriSeal compared to control led to a significant median improvement in forced expiratory volume in one second (FEV1) (18.9%, interquartile range (IQR) -0.7% to 41.9% versus 1.3%, IQR -8.2% to 12.9%), and higher quality of life, as measured by the St Georges Respiratory Questionnaire (SGRQ) (-12 units, IQR -22 units to -5 units, versus -3 units, IQR -5 units to 1 units), P = 0.043 and P = 0.0072 respectively. Although there was no significant difference in mortality (Odds Ratio (OR) 2.90, 95% CI 0.14 to 62.15), adverse events were more common for participants treated with AeriSeal (OR 3.71, 95% CI 1.34 to 10.24). The quality of evidence found in this prematurely terminated study was rated low to moderate. Airway bypass stentsTreatment with airway bypass stents compared to control did not lead to significant between-group changes in FEV1 (0.95%, 95% CI -0.16% to 2.06%) or SGRQ scores (-2.00 units, 95% CI -5.58 units to 1.58 units), as found by one study comprising 315 participants. There was no significant difference in mortality (OR 0.76, 95% CI 0.21 to 2.77), nor were there significant differences in adverse events (OR 1.33, 95% CI 0.65 to 2.73) between the two groups. The quality of evidence was rated moderate to high. Endobronchial coilsThree studies comprising 461 participants showed that treatment with endobronchial coils compared to control led to a significant between-group mean difference in FEV1 (10.88%, 95% CI 5.20% to 16.55%) and SGRQ (-9.14 units, 95% CI -11.59 units to -6.70 units). There were no significant differences in mortality (OR 1.49, 95% CI 0.67 to 3.29), but adverse events were significantly more common for participants treated with coils (OR 2.14, 95% CI 1.41 to 3.23). The quality of evidence ranged from low to high. Endobronchial valvesFive studies comprising 703 participants found that endobronchial valves versus control led to significant improvements in FEV1 (standardized mean difference (SMD) 0.48, 95% CI 0.32 to 0.64) and scores on the SGRQ (-7.29 units, 95% CI -11.12 units to -3.45 units). There were no significant differences in mortality between the two groups (OR 1.07, 95% CI 0.47 to 2.43) but adverse events were more common in the endobronchial valve group (OR 5.85, 95% CI 2.16 to 15.84). Participant selection plays an important role as absence of collateral ventilation was associated with superior clinically significant improvements in health outcomes. The quality of evidence ranged from low to high. Intrabronchial valvesIn the comparison of partial bilateral placement of intrabronchial valves to control, one trial favoured control in FEV1 (-2.11% versus 0.04%, P = 0.001) and one trial found no difference between the groups (0.9 L versus 0.87 L, P = 0.065). There were no significant differences in SGRQ scores (MD 2.64 units, 95% CI -0.28 units to 5.56 units) or mortality rates (OR 4.95, 95% CI 0.85 to 28.94), but adverse events were more frequent (OR 3.41, 95% CI 1.48 to 7.84) in participants treated with intrabronchial valves. The lack of functional benefits may be explained by the procedural strategy used, as another study (22 participants) compared unilateral versus partial bilateral placement, finding significant improvements in FEV1 and SGRQ when using the unilateral approach. The quality of evidence ranged between moderate to high. Vapour ablationOne study of 69 participants found significant mean between-group differences in FEV1 (14.70%, 95% CI 7.98% to 21.42%) and SGRQ (-9.70 units, 95% CI -15.62 units to -3.78 units), favouring vapour ablation over control. There was no significant between-group difference in mortality (OR 2.82, 95% CI 0.13 to 61.06), but vapour ablation led to significantly more adverse events (OR 3.86, 95% CI 1.00 to 14.97). The quality of evidence ranged from low to moderate. AUTHORS' CONCLUSIONS Results for selected BLVR procedures indicate they can provide significant and clinically meaningful short-term (up to one year) improvements in health outcomes, but this was at the expense of increased adverse events. The currently available evidence is not sufficient to assess the effect of BLVR procedures on mortality. These findings are limited by the lack of long-term follow-up data, limited availability of cost-effectiveness data, significant heterogeneity in results, presence of skew and high CIs, and the open-label character of a number of the studies.
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Affiliation(s)
| | - Khin Hnin
- Flinders UniversityAdelaideAustralia
| | | | | | - Brian J Smith
- The University of AdelaideSchool of MedicineAdelaideAustralia
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Abstract
BACKGROUND Lung volume reduction surgery (LVRS) performed to treat patients with severe diffuse emphysema was reintroduced in the nineties. Lung volume reduction surgery aims to resect damaged emphysematous lung tissue, thereby increasing elastic properties of the lung. This treatment is hypothesised to improve long-term daily functioning and quality of life, although it may be costly and may be associated with risks of morbidity and mortality. Ten years have passed since the last version of this review was prepared, prompting us to perform an update. OBJECTIVES The objective of this review was to gather all available evidence from randomised controlled trials comparing the effectiveness of lung volume reduction surgery (LVRS) versus non-surgical standard therapy in improving health outcomes for patients with severe diffuse emphysema. Secondary objectives included determining which subgroup of patients benefit from LVRS and for which patients LVRS is contraindicated, to establish the postoperative complications of LVRS and its morbidity and mortality, to determine which surgical approaches for LVRS are most effective and to calculate the cost-effectiveness of LVRS. SEARCH METHODS We identified RCTs by using the Cochrane Airways Group Chronic Obstructive Pulmonary Disease (COPD) register, in addition to the online clinical trials registers. Searches are current to April 2016. SELECTION CRITERIA We included RCTs that studied the safety and efficacy of LVRS in participants with diffuse emphysema. We excluded studies that investigated giant or bullous emphysema. DATA COLLECTION AND ANALYSIS Two independent review authors assessed trials for inclusion and extracted data. When possible, we combined data from more than one study in a meta-analysis using RevMan 5 software. MAIN RESULTS We identified two new studies (89 participants) in this updated review. A total of 11 studies (1760 participants) met the entry criteria of the review, one of which accounted for 68% of recruited participants. The quality of evidence ranged from low to moderate owing to an unclear risk of bias across many studies, lack of blinding and low participant numbers for some outcomes. Eight of the studies compared LVRS versus standard medical care, one compared two closure techniques (stapling vs laser ablation), one looked at the effect of buttressing the staple line on the effectiveness of LVRS and one compared traditional 'resectional' LVRS with a non-resectional surgical approach. Participants completed a mandatory course of pulmonary rehabilitation/physical training before the procedure commenced. Short-term mortality was higher for LVRS (odds ratio (OR) 6.16, 95% confidence interval (CI) 3.22 to 11.79; 1489 participants; five studies; moderate-quality evidence) than for control, but long-term mortality favoured LVRS (OR 0.76, 95% CI 0.61 to 0.95; 1280 participants; two studies; moderate-quality evidence). Participants identified post hoc as being at high risk of death from surgery were those with particularly impaired lung function, poor diffusing capacity and/or homogenous emphysema. Participants with upper lobe-predominant emphysema and low baseline exercise capacity showed the most favourable outcomes related to mortality, as investigators reported no significant differences in early mortality between participants treated with LVRS and those in the control group (OR 0.87, 95% CI 0.23 to 3.29; 290 participants; one study), as well as significantly lower mortality at the end of follow-up for LVRS compared with control (OR 0.45, 95% CI 0.26 to 0.78; 290 participants; one study). Trials in this review furthermore provided evidence of low to moderate quality showing that improvements in lung function parameters other than forced expiratory volume in one second (FEV1), quality of life and exercise capacity were more likely with LVRS than with usual follow-up. Adverse events were more common with LVRS than with control, specifically the occurrence of (persistent) air leaks, pulmonary morbidity (e.g. pneumonia) and cardiovascular morbidity. Although LVRS leads to an increase in quality-adjusted life-years (QALYs), the procedure is relatively costly overall. AUTHORS' CONCLUSIONS Lung volume reduction surgery, an effective treatment for selected patients with severe emphysema, may lead to better health status and lung function outcomes, specifically for patients who have upper lobe-predominant emphysema with low exercise capacity, but the procedure is associated with risks of early mortality and adverse events.
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Affiliation(s)
| | | | - Leong Ung Tiong
- The Queen Elizabeth HospitalDepartment of SurgeryAdelaideAustralia
| | - Brian J Smith
- The University of AdelaideSchool of MedicineAdelaideAustralia
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Spyratos D, Chloros D, Michalopoulou D, Sichletidis L. Estimating the extent and economic impact of under and overdiagnosis of chronic obstructive pulmonary disease in primary care. Chron Respir Dis 2016; 13:240-6. [PMID: 26965221 PMCID: PMC5720183 DOI: 10.1177/1479972316636989] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The aim of the present study was to estimate the frequency of under- and over-diagnosis as well as overtreatment and their impact on the financial burden of inhaled drugs for stable chronic obstructive pulmonary disease (COPD). We examined 3200 subjects (65.5% males) of the general population (>40 year old, current or former smokers, and asthma patients were excluded) during a 3-year period. All participants gave detailed medical history, underwent spirometry, and their current and past inhaled medications were registered through the national electronic prescription system. We diagnosed 342 subjects (10.7%) with COPD of whom 180 (52.6%) had no prior medical diagnosis. Overdiagnosis was the case for 306 subjects (9.6%) of whom 35.1% were treated with inhaled drugs during the last year. We calculated that 55.4% of the current cost for inhaled drugs is wasted to overtreatment and overdiagnosis. If there was adherence to Global Initiative for Chronic Obstructive Lung Disease (GOLD) guidelines both for the diagnosis and treatment it would be a net profit of 36,059€ annually, which would be increased to 116,017€ if we had excluded underdiagnosed patients. Under- and over-diagnosis of COPD as well as non-adherence to GOLD guidelines for treatment are common problems in the primary care setting that increase significantly the economic burden of inhaled medications.
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Affiliation(s)
- Dionisios Spyratos
- Pulmonary Department, G. Papanikolaou Hospital, Aristotle University of Thessaloniki, Exohi, Thessaloniki, Greece
| | - Diamantis Chloros
- Pulmonary Department, G. Papanikolaou Hospital, Aristotle University of Thessaloniki, Exohi, Thessaloniki, Greece
| | | | - Lazaros Sichletidis
- Pulmonary Department, G. Papanikolaou Hospital, Aristotle University of Thessaloniki, Exohi, Thessaloniki, Greece
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Lilholt PH, Hæsum LKE, Ehlers LH, Hejlesen OK. Specific technological communication skills and functional health literacy have no influence on self-reported benefits from enrollment in the TeleCare North trial. Int J Med Inform 2016; 91:60-6. [DOI: 10.1016/j.ijmedinf.2016.04.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2015] [Revised: 04/14/2016] [Accepted: 04/18/2016] [Indexed: 10/21/2022]
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Da Silva GPF, Morano MTAP, Cavalcante AGDM, De Andrade NM, Daher EDF, Pereira EDB. Exercise capacity impairment in COPD patients with comorbidities. REVISTA PORTUGUESA DE PNEUMOLOGIA 2015; 21:233-8. [PMID: 26099241 DOI: 10.1016/j.rppnen.2015.04.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2014] [Revised: 03/28/2015] [Accepted: 04/01/2015] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND Comorbidities are common in COPD and have been associated with reduced health status, increased health care utilization, all-cause hospitalization, and mortality. There is a scarcity of data on the relationship between comorbidities and functional capacity. OBJECTIVE to evaluate the impact of comorbidities on functional capacity of COPD patients. METHODS a cross-sectional study was conducted at two teaching hospitals in Fortaleza, Brazil. The functional capacity was assessed by spirometry and the 6-min walking test (6MWT). The health status was assessed by the St. George's respiratory questionnaire (SGRQ) and the COPD assessment test (CAT). The sample was stratified as having "none", "one" and "two or three" comorbidities groups. One-way ANOVA was used to compare means of the three groups and a multiple linear regression was run to predict the impact of comorbidities on 6MWT. RESULTS Comorbidities (hypertension, coronary disease and diabetes) were found in 54% of the studied patients. The mean age of the 79 patients was 67±8 years and 55% were male. CAT scores increased from "no comorbidity" (17.9±7.7) to "one comorbidity" (22.8±6.8) and "two or three comorbidities" groups (24.2±10.2). A post hoc test showed a significant difference in the "no comorbidity" compared to the "two or three comorbidities" groups (p=0.01). The distance walked by the patients decreased from "no comorbidity" (386.1±83.2m) to "one comorbidity" (350±98m) and "two or three comorbidities" groups (312.6±91m). A post hoc test showed significant difference in the "no comorbidity" compared to "two or three comorbidities" groups (p=0.007). Numbers of comorbidities were independently associated with the 6MWT adjusting for age, severity of COPD and CAT scores. CONCLUSION in the studied sample, the presence of comorbidities contributed to impair exercise capacity in patients with COPD.
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Affiliation(s)
- G P F Da Silva
- Universidade Federal do Ceará - UFC, Fortaleza, Brazil; Universidade de Fortaleza - UNIFOR, Fortaleza, Brazil
| | | | | | | | | | - E D B Pereira
- Universidade Federal do Ceará - UFC, Fortaleza, Brazil.
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Srivastava K, Thakur D, Sharma S, Punekar YS. Systematic review of humanistic and economic burden of symptomatic chronic obstructive pulmonary disease. PHARMACOECONOMICS 2015; 33:467-488. [PMID: 25663178 DOI: 10.1007/s40273-015-0252-4] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
BACKGROUND An understanding of the humanistic and economic burden of individuals with symptomatic chronic obstructive pulmonary disease (COPD) is required to inform payers and healthcare professionals about the disease burden. OBJECTIVES The aim of this systematic review was to identify and present humanistic [health-related quality of life (HRQoL)] and economic burdens of symptomatic COPD. METHODS A comprehensive search of online databases (reimbursement or claims databases/other databases), abstracts from conference proceedings, published literature, clinical trials, medical records, health ministries, financial reports, registries, and other sources was conducted. Adult patients of any race or gender with symptomatic COPD were included. Humanistic and economic burdens included studies evaluating HRQoL and cost and resource use, respectively, associated with symptomatic COPD. RESULTS Thirty-two studies reporting humanistic burden and 74 economic studies were identified. Symptomatic COPD led to impairment in the health state of patients, as assessed by HRQoL instruments. It was also associated with high economic burden across all countries. The overall, direct, and indirect costs per patient increased with an increase in symptoms, dyspnoea severity, and duration of disease. Across countries, the annual societal costs associated with symptomatic COPD were higher among patients with comorbidities. CONCLUSIONS Symptomatic COPD is associated with a substantial economic burden. The HRQoL of patients with symptomatic COPD is, in general, low and influenced by dyspnoea.
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Affiliation(s)
- Kunal Srivastava
- HERON Health PVT (Now Parexel), 3rd Floor, DLF Tower E, Rajiv Gandhi IT Park, Chandigarh, India
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Punekar YS, Wurst K, Shukla A. Resource Use and Costs up to Two Years Post Diagnosis Among Newly Diagnosed COPD Patients in the UK Primary Care Setting: A Retrospective Cohort Study. COPD 2014; 12:267-75. [PMID: 25093809 DOI: 10.3109/15412555.2014.933953] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The objective of this study was to estimate the annual resource use and costs before and after COPD diagnosis and compare it across stages of airflow obstruction and levels of dyspnoea in the UK primary care setting. A retrospective cohort of newly diagnosed COPD patients (1/1/2008-31/12/2009) was identified in the UK Clinical Practice Research Datalink (CPRD). Resource use did not include medication costs and comprised of exacerbations, all cause GP interactions, and non-COPD hospitalisations, which were estimated for up to 12 months before and 24 months after COPD diagnosis. It was further stratified using baseline characteristics, Medical Research Council (MRC) dyspnoea score, and stages of airflow limitation. COPD costs were estimated using NHS reference costs. The analysis included 7881 newly diagnosed COPD patients (mean age, 67.2 years; 45% females). In the 2 years follow-up, the cohort experienced moderate and severe exacerbations, non-COPD hospitalisations, and GP surgery visits at an annual rate of 0.51, 0.13, 0.47, and 12.85, respectively. All resource components showed an upward trend with increase airflow limitation and dyspnoea. GP interactions accounted for 58.5% of annual per patient COPD management costs, estimated to be £ 2047 during the observation period. The annual costs doubled from patients with low levels of dyspnoea (MRC = 1; £ 1473) to those with high levels of dyspnoea (MRC = 5; £ 3243). COPD management costs in the primary care setting continued to remain high up to 2 years following initial diagnosis. The cost burden increased with high levels of dyspnoea and airflow obstruction, suggesting that both measures can identify patients requiring increased monitoring.
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Blasi F, Cesana G, Conti S, Chiodini V, Aliberti S, Fornari C, Mantovani LG. The clinical and economic impact of exacerbations of chronic obstructive pulmonary disease: a cohort of hospitalized patients. PLoS One 2014; 9:e101228. [PMID: 24971791 PMCID: PMC4074190 DOI: 10.1371/journal.pone.0101228] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2014] [Accepted: 06/04/2014] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Chronic Obstructive Pulmonary Disease (COPD) is a common disease with significant health and economic consequences. This study assesses the burden of COPD in the general population, and the influence of exacerbations (E-COPD) on disease progression and costs. METHODS This is a secondary data analysis of healthcare administrative databases of the region of Lombardy, in northern Italy. The study included ≥ 40 year-old patients hospitalized for a severe E-COPD (index event) during 2006. Patients were classified in relation to the number and type of E-COPD experienced in a three-year pre-index period. Subjects were followed up until December 31st, 2009, collecting data on healthcare resource use and vital status. RESULTS 15857 patients were enrolled -9911 males, mean age: 76 years (SD 10). Over a mean follow-up time of 2.4 years (1.36), 81% of patients had at least one E-COPD with an annual rate of 3.2 exacerbations per person-year and an all-cause mortality of 47%. A history of exacerbation influenced the occurrence of new E-COPD and mortality after discharge for an E-COPD. On average, the healthcare system spent 6725€ per year per person (95%CI 6590-6863). Occurrence and type of exacerbations drove the direct healthcare cost. Less than one quarter of patients presented claims for pulmonary function tests. CONCLUSIONS COPD imposes a substantial burden on healthcare systems, mainly attributable to the type and occurrence of E-COPD, or in other words, to the exacerbator phenotypes. A more tailored approach to the management of COPD patients is required.
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Affiliation(s)
- Francesco Blasi
- Department of Pathophysiology and Transplantation, Università degli Studi di Milano, IRCCS Fondazione Ca’ Granda, Ospedale Maggiore Policlinico, Milan, Italy
| | - Giancarlo Cesana
- CESP, Research Centre on Public Health, Department of Statistics and Quantitative Methods, University of Milano – Bicocca, Monza, Italy
| | - Sara Conti
- CESP, Research Centre on Public Health, Department of Statistics and Quantitative Methods, University of Milano – Bicocca, Monza, Italy
| | - Virginio Chiodini
- CESP, Research Centre on Public Health, Department of Statistics and Quantitative Methods, University of Milano – Bicocca, Monza, Italy
| | - Stefano Aliberti
- Department of Health Sciences, University of Milano – Bicocca, Respiratory Unit, AO San Gerardo, Monza, Italy
| | - Carla Fornari
- CESP, Research Centre on Public Health, Department of Statistics and Quantitative Methods, University of Milano – Bicocca, Monza, Italy
| | - Lorenzo Giovanni Mantovani
- CESP, Research Centre on Public Health, Department of Statistics and Quantitative Methods, University of Milano – Bicocca, Monza, Italy
- University of Napoli Federico II, Naples, Italy
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Lodewijckx C, Decramer M, Sermeus W, Panella M, Deneckere S, Vanhaecht K. Eight-step method to build the clinical content of an evidence-based care pathway: the case for COPD exacerbation. Trials 2012; 13:229. [PMID: 23190552 PMCID: PMC3543249 DOI: 10.1186/1745-6215-13-229] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2012] [Accepted: 10/23/2012] [Indexed: 11/20/2022] Open
Abstract
BACKGROUND Optimization of the clinical care process by integration of evidence-based knowledge is one of the active components in care pathways. When studying the impact of a care pathway by using a cluster-randomized design, standardization of the care pathway intervention is crucial. This methodology paper describes the development of the clinical content of an evidence-based care pathway for in-hospital management of chronic obstructive pulmonary disease (COPD) exacerbation in the context of a cluster-randomized controlled trial (cRCT) on care pathway effectiveness. METHODS The clinical content of a care pathway for COPD exacerbation was developed based on recognized process design and guideline development methods. Subsequently, based on the COPD case study, a generalized eight-step method was designed to support the development of the clinical content of an evidence-based care pathway. RESULTS A set of 38 evidence-based key interventions and a set of 24 process and 15 outcome indicators were developed in eight different steps. Nine Belgian multidisciplinary teams piloted both the set of key interventions and indicators. The key intervention set was judged by the teams as being valid and clinically applicable. In addition, the pilot study showed that the indicators were feasible for the involved clinicians and patients. CONCLUSIONS The set of 38 key interventions and the set of process and outcome indicators were found to be appropriate for the development and standardization of the clinical content of the COPD care pathway in the context of a cRCT on pathway effectiveness. The developed eight-step method may facilitate multidisciplinary teams caring for other patient populations in designing the clinical content of their future care pathways.
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Affiliation(s)
- Cathy Lodewijckx
- Respiratory Department, University Hospitals Leuven, Leuven, Belgium
- Department of Public Health, KU Leuven University of Leuven, Leuven, Belgium
- European Pathway Association, Kapucijnenvoer, Leuven, Belgium
| | - Marc Decramer
- Respiratory Department, University Hospitals Leuven, Leuven, Belgium
- Faculty of Medicine, KU Leuven University of Leuven, Leuven, Belgium
| | - Walter Sermeus
- Department of Public Health, KU Leuven University of Leuven, Leuven, Belgium
- European Pathway Association, Kapucijnenvoer, Leuven, Belgium
| | - Massimiliano Panella
- European Pathway Association, Kapucijnenvoer, Leuven, Belgium
- Department of Public Health, Department of Clinical and Experimental Medicine, Faculty of Medicine, Amedeo Avogadro University of Eastern Piedmont, Novara, Italy
| | - Svin Deneckere
- Department of Public Health, KU Leuven University of Leuven, Leuven, Belgium
- European Pathway Association, Kapucijnenvoer, Leuven, Belgium
| | - Kris Vanhaecht
- Department of Public Health, KU Leuven University of Leuven, Leuven, Belgium
- European Pathway Association, Kapucijnenvoer, Leuven, Belgium
- Western Norway Research Network on Integrated Care, Helse Fonna, Haugesund, Norway
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Nilsson JLG, Haupt D, Krigsman K, Moen J. Asthma/COPD drugs reflecting disease prevalence, patient adherence and persistence. Expert Rev Respir Med 2012; 3:93-101. [PMID: 20477285 DOI: 10.1586/17476348.3.1.93] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The aim of this review is to discuss the methodological issues involved in using pharmacy-record databases of drug sales in pharmacoepidemiology and to illustrate the usefulness of such data in estimating disease prevalence, patient adherence and persistence to therapy. Recent studies show that asthma/chronic obstructive pulmonary disease (COPD) prevalence increases with age. The volume of acquired asthma/COPD drugs per patient also increases with age and was approximately 2.5-times higher for patients aged 60-69 years compared with patients aged 20-29 years. Despite this, there is a comparatively low interest in asthma/COPD research involving elderly individuals. Published asthma/COPD-prevalence data and drug-treatment-prevalence data correspond reasonably well. Short- as well as long-term studies on drug acquisition indicate that approximately a third of patients have drugs available to cover at least 80% of the prescribed treatment time. Only approximately a tenth of the patients acquired steroids or steroid combinations, corresponding to one daily defined dose per day over a 5-year treatment period. It is probable that asthma/COPD is undertreated in all age groups.
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Rutten-van Mölken MPMH, Goossens LMA. Cost effectiveness of pharmacological maintenance treatment for chronic obstructive pulmonary disease: a review of the evidence and methodological issues. PHARMACOECONOMICS 2012; 30:271-302. [PMID: 22409290 DOI: 10.2165/11589270-000000000-00000] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
BACKGROUND Over 200 million people have chronic obstructive pulmonary disease (COPD) worldwide. The number of disease-year equivalents and deaths attributable to COPD are high. Guidelines for the pharmacological treatment of the disease recommend an individualized step-up approach in which treatment is intensified when results are unsatisfactory. OBJECTIVE Our objective was to present a systematic review of the cost effectiveness of pharmacological maintenance treatment for COPD and to discuss the methodological strengths and weaknesses of the studies. METHODS A systematic literature search for economic evaluations of drug therapy in COPD was performed in MEDLINE, EMBASE, the Economic Evaluation Database of the UK NHS (NHS-EED) and the European Network of Health Economic Evaluation Databases (EURONHEED). Full economic evaluations presenting both costs and health outcomes were included. RESULTS A total of 40 studies were included in the review. Of these, 16 were linked to a clinical trial, 14 used Markov models, eight were based on observational data and two used a different approach. The few studies on combining short-acting bronchodilators were consistent in finding net cost savings compared with monotherapy. Studies comparing inhaled corticosteroids (ICS) with placebo or no maintenance treatment reported inconsistent results. Studies comparing fluticasone with salmeterol consistently found salmeterol to be more cost effective. The cost-effectiveness studies of tiotropium versus placebo, ipratropium or salmeterol pointed towards a reduction in total COPD-related healthcare costs for tiotropium in many but not all studies. All of these studies reported additional health benefits of tiotropium. The cost-effectiveness studies of the combination of inhaled long-acting β₂-agonists and ICS all report additional health benefits at an increase in total COPD-related costs in most studies. The cost-per-QALY estimates of this combination treatment vary widely and are very sensitive to the assumptions on mortality benefit and time horizon. CONCLUSIONS The currently available economic evaluations indicate differences in cost effectiveness between COPD maintenance therapies, but for a more meaningful comparison of results it is important to improve the consistency with respect to study methodology and choice of comparator.
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Affiliation(s)
- Maureen P M H Rutten-van Mölken
- Institute for Medical Technology Assessment/Institute for Healthcare Policy and Management, Erasmus University Rotterdam, Rotterdam, the Netherlands.
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de Bruin SR, Heijink R, Lemmens LC, Struijs JN, Baan CA. Impact of disease management programs on healthcare expenditures for patients with diabetes, depression, heart failure or chronic obstructive pulmonary disease: A systematic review of the literature. Health Policy 2011; 101:105-21. [DOI: 10.1016/j.healthpol.2011.03.006] [Citation(s) in RCA: 80] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2010] [Revised: 03/15/2011] [Accepted: 03/28/2011] [Indexed: 11/29/2022]
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Donner CF, Virchow JC, Lusuardi M. Pharmacoeconomics in COPD and inappropriateness of diagnostics, management and treatment. Respir Med 2011; 105:828-37. [DOI: 10.1016/j.rmed.2010.12.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2010] [Revised: 11/29/2010] [Accepted: 12/20/2010] [Indexed: 10/18/2022]
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Lee SW, Yoo JH, Park MJ, Kim EK, Yoon HI, Kim DK, Lee CH, Park YB, Park JH, Hwang YI, Jung KS, Yoo KH, Park HY, Lee JS, Huh JW, Oh YM, Lim SY, Jung JY, Kim YS, Kim HJ, Rhee CK, Kim YK, Kim JW, Yoon HK, Lee SD. Early Diagnosis and Management of Chronic Obstructive Pulmonary Disease. Tuberc Respir Dis (Seoul) 2011. [DOI: 10.4046/trd.2011.70.4.293] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Affiliation(s)
- Sei Won Lee
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea
| | - Jee-Hong Yoo
- Department of Internal Medicine, Kyung Hee University Hospital, Seoul, Korea
| | - Myung Jae Park
- Department of Internal Medicine, Kyung Hee University Hospital, Seoul, Korea
| | - Eun Kyung Kim
- Department of Internal Medicine, CHA Bundang Medical Center, CHA University, Seongnam, Korea
| | - Ho Il Yoon
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea
| | - Deog Kyeom Kim
- Department of Internal Medicine, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, Seoul National University College of Medicine, Seoul, Korea
| | - Chang Hoon Lee
- Department of Internal Medicine, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, Seoul National University College of Medicine, Seoul, Korea
| | - Yong Bum Park
- Department of Internal Medicine, Kang-Dong Sacred Heart Hospital, Hallym University College of Medicine, Seoul, Korea
| | - Joo Hun Park
- Department of Pulmonary and Critical Care Medicine, Ajou University School of Medicine, Suwon, Korea
| | - Yong Il Hwang
- Department of Internal Medicine, Hallym University Sacred Heart Hospital, Anyang, Korea
| | - Ki-Suck Jung
- Department of Internal Medicine, Hallym University Sacred Heart Hospital, Anyang, Korea
| | - Kwang Ha Yoo
- Department of Internal Medicine, Konkuk University College of Medicine, Seoul, Korea
| | - Hye Yoon Park
- Department of Internal Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Jae Seung Lee
- Department of Pulmonary and Critical Care Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Jin-Won Huh
- Department of Pulmonary and Critical Care Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Yeon Mok Oh
- Department of Pulmonary and Critical Care Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Seong Yong Lim
- Department of Internal Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Ji Ye Jung
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - Young Sam Kim
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - Hui Jung Kim
- Department of Internal Medicine, Wonkwang University Sanbon Hospital, Wonkwang University College of Medicine, Gunpo, Korea
| | - Chin Kook Rhee
- Department of Internal Medicine, Seoul St. Mary's Hospital, Seoul, Korea
| | - Young Kyoon Kim
- Department of Internal Medicine, Seoul St. Mary's Hospital, Seoul, Korea
| | - Jin Woo Kim
- Department of Internal Medicine, Uijeongbu St. Mary's Hospital, Uijeongbu, Korea
| | - Hyoung Kyu Yoon
- Department of Internal Medicine, Yeouido St. Mary's Hospital, The Catholic University of Korea College of Medicine, Seoul, Korea
| | - Sang-Do Lee
- Department of Pulmonary and Critical Care Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
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Donner CF, Lusuardi M. COPD a social disease: inappropriateness and pharmaco-economics. The role of the specialist: present and future. Multidiscip Respir Med 2010; 5:437-49. [PMID: 22958390 PMCID: PMC3463056 DOI: 10.1186/2049-6958-5-6-437] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2010] [Accepted: 11/22/2010] [Indexed: 11/10/2022] Open
Affiliation(s)
- Claudio F Donner
- Mondo Medico, Multidisciplinary and Rehabilitation Outpatient Clinic, Borgomanero (NO), Italy.
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Leidy NK, Wilcox TK, Jones PW, Murray L, Winnette R, Howard K, Petrillo J, Powers J, Sethi S. Development of the EXAcerbations of Chronic Obstructive Pulmonary Disease Tool (EXACT): a patient-reported outcome (PRO) measure. VALUE IN HEALTH : THE JOURNAL OF THE INTERNATIONAL SOCIETY FOR PHARMACOECONOMICS AND OUTCOMES RESEARCH 2010; 13:965-975. [PMID: 20659270 DOI: 10.1111/j.1524-4733.2010.00772.x] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
BACKGROUND This article describes the qualitative methods used to develop the EXAcerbation of Chronic Pulmonary Disease Tool (EXACT), a new patient-reported outcome (PRO) instrument for evaluating frequency, severity, and duration of exacerbations of chronic obstructive pulmonary disease (COPD). METHODS Focus groups and interviews were conducted in the United States with COPD patients treated for exacerbations during the past 6 months. Participants were asked to describe exacerbation attributes, care-seeking cues, and indications of progression and recovery. An iterative process was used to identify themes in the data to inform instrument content and structure. Cognitive debriefing interviews were performed to evaluate and revise the draft item pool. Experts in COPD, instrument development, and clinical research participated in the process. RESULTS Eighty-three subjects participated in elicitation focus groups or interviews (n=48); elicitation interviews with cognitive debriefing (n=23), or cognitive interviews alone (n=12). Mean age of the sample was 65 years (SD=10); 45% were male; mean FEV-1% predicted was 44% (SD=16). Participants characterized exacerbations as a persistent increase in the severity of respiratory symptoms and other systemic manifestations accompanied by a dramatic reduction in activity. Specific attributes included shortness of breath, chest congestion, cough, sputum, chest discomfort, feeling weak or tired, sleep disturbances, and concern or worry. The diary card of 23 candidate items was debriefed in booklet and electronic format. CONCLUSIONS Qualitative data from patients and input from experts formed the basis of the EXACT's structure and item pool, ready for empirically based item reduction and reliability and validity testing.
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Affiliation(s)
- Nancy Kline Leidy
- Center for Health Outcomes Research, United BioSource Corporation, Bethesda, MD 20814, USA.
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Tashkin DP. Indacaterol maleate for the treatment of chronic obstructive pulmonary disease. Expert Opin Pharmacother 2010; 11:2077-85. [PMID: 20642373 DOI: 10.1517/14656566.2010.499358] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
IMPORTANCE OF THE FIELD Chronic obstructive pulmonary disease (COPD) is a partially reversible, progressive obstructive disorder. Bronchodilators are the mainstay of treatment since they improve lung function and patient-reported outcomes and reduce acute exacerbations. Long-acting inhaled bronchodilators (at present including the once-daily antimuscarinic tiotropium, and the twice-daily beta(2)-agonists formoterol and salmeterol) are recommended as first-line treatment for patients with persistent symptoms. Indacaterol maleate has been developed as a new once-daily inhaled beta(2)-selective agonist. AREAS COVERED IN THIS REVIEW This article reviews the published literature on the pharmacologic properties and the Phase II and III trials that have evaluated the safety and efficacy of this new agent. WHAT THE READER WILL GAIN The reader will obtain an appreciation of the safety and efficacy of indacaterol and the role that it might play in the future management of COPD of varying severity. TAKE HOME MESSAGE Indacaterol is a new, once-daily beta(2)-agonist with an onset of action within 5 min and a duration of bronchodilation of at least 24 h. In doses of 150 and 300 microg, it has sustained benefits over 6 - 12 months with respect to both bronchodilation and patient-reported outcomes and is well-tolerated with an acceptable safety profile.
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Affiliation(s)
- Donald P Tashkin
- David Geffen School of Medicine at UCLA, Los Angeles, California 90095, USA.
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Synthesis and pharmacological activity of 1,3,6-trisubstituted-4-oxo-1,4-dihydroquinoline-2-carboxylic acids as selective ETA antagonists. Bioorg Med Chem Lett 2010; 20:6840-4. [DOI: 10.1016/j.bmcl.2010.08.074] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2010] [Accepted: 08/16/2010] [Indexed: 11/21/2022]
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Sharafkhaneh A, Mattewal AS, Abraham VM, Dronavalli G, Hanania NA. Budesonide/formoterol combination in COPD: a US perspective. Int J Chron Obstruct Pulmon Dis 2010; 5:357-66. [PMID: 21037960 PMCID: PMC2962302 DOI: 10.2147/copd.s4215] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Chronic obstructive pulmonary disease (COPD) is a preventable and treatable disease of the lung caused primarily by exposure to cigarette smoke. Clinically, it presents with progressive cough, sputum production, dyspnea, reduced exercise capacity, and diminished quality of life. Physiologically, it is characterized by the presence of partially reversible expiratory airflow limitation and hyperinflation. Pathologically, COPD is a multicomponent disease characterized by bronchial submucosal mucous gland hypertrophy, bronchiolar mucosal hyperplasia, increased luminal inflammatory mucus, airway wall inflammation and scarring, and alveolar wall damage and destruction. Management of COPD involves both pharmacological and nonpharmacological approaches. Bronchodilators and inhaled corticosteroids are recommended medications for management of COPD especially in more severe disease. Combination therapies containing these medications are now available for the chronic management of stable COPD. The US Food and Drug Administration, recently, approved the combination of budesonide/formoterol (160/4.5 μg; Symbicort™, AstraZeneca, Sweden) delivered via a pressurized meter dose inhaler for maintenance management of stable COPD. The combination also is delivered via dry powder inhaler (Symbicort™ and Turbuhaler™, AstraZeneca, Sweden) but is not approved for use in the United States. In this review, we evaluate available data of the efficacy and safety of this combination in patients with COPD.
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Affiliation(s)
- Amir Sharafkhaneh
- Department of Medicine, Baylor College of Medicine, Houston, Texas 77030, USA.
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Tashkin DP. Impact of tiotropium on the course of moderate-to-very severe chronic obstructive pulmonary disease: the UPLIFT trial. Expert Rev Respir Med 2010; 4:279-89. [PMID: 20524910 DOI: 10.1586/ers.10.23] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The Understanding Potential Long-term Improvements in Function with Tiotropium (UPLIFT) trial was a global 4-year randomized placebo-controlled clinical trial that evaluated the long-term impact of tiotropium bromide 18 microg once daily on the accelerated age-related decline in pre- and post-bronchodilator forced expiratory volume in 1 s (FEV(1); co-primary end points). Secondary end points included lung function at serial clinic visits, health-related quality of life, exacerbations, exacerbation-related hospitalizations, mortality, safety and tolerability. The study was carried out in 5992 patients (75% male, mean age 65 years, 30% current smokers) with moderate-to-very severe chronic obstructive pulmonary disease who were permitted to receive prescribed treatment with long-acting beta(2)-agonists and/or inhaled corticosteroids in addition to the study drug. While the results failed to show an effect of tiotropium on the primary end points (rate of decline in pre- and post-bronchodilator FEV(1)), they did show improvements in lung function and health-related quality of life that were maintained throughout the study and a reduction in the risk of exacerbations and related hospitalizations. Tiotropium also reduced all-cause mortality in patients on treatment over the 4-year trial period and reduced lower respiratory and cardiovascular morbidity, including respiratory failure and myocardial infarction. Adverse events were consistent with the drug's known anticholinergic pharmacology.
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Affiliation(s)
- Donald P Tashkin
- David Geffen School of Medicine at UCLA, 10833 Le Conte Avenue, Los Angeles, CA 90272, USA.
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Dal Negro R, Micheletto C, Tognella S, Visconti M, Turati C. Tobramycin Nebulizer Solution in severe COPD patients colonized with Pseudomonas aeruginosa: effects on bronchial inflammation. Adv Ther 2008; 25:1019-30. [PMID: 18821068 DOI: 10.1007/s12325-008-0105-2] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
INTRODUCTION Airway colonization with Pseudomonas aeruginosa is frequent in severe chronic obstructive pulmonary disease (COPD) and may lead to progressive inflammatory damage. Inhaled Tobramycin Nebulizer Solution (TNS; a preservative-free formulation) is an effective therapy in chronic P aeruginosa infection in cystic fibrosis and bronchiectasis. In this study we aimed to investigate the effects of a TNS short course on inflammatory markers in bronchial secretions from multiresistant P aeruginosa-colonized patients with severe COPD. To the authors' knowledge, this is the first study to examine this in cases of severe COPD. METHODS Thirteen COPD patients (GOLD criteria 3-4; mean age 72.7+/- 8 years; mean basal forced expiratory volume in 1 second (FEV(1)) 34.8%+/-8.1%; mean FEV(1)/forced vital capacity 0.6+/-0.1) were enrolled. All patients were colonized with P aeruginosa and resistant to oral/intravenous specific antibiotics. Eosinophilic cationic protein (ECP), interleukin-1 beta (IL-1beta), interleukin-8 (IL-8), tumor necrosis factor alfa (TNF-alpha), and cell counts were measured in spontaneous secretions before and after a 2-week TNS course (300 mg twice daily). RESULTS The TNS course induced a significant reduction in IL-1beta (P<0.03), IL-8 (P<0.02), ECP (P<0.01) concentrations, and in eosinophil count (P<0.01). TNF-alpha levels, and neutrophil and lymphocyte counts were not significantly affected. The second week of treatment proved crucial in terms of efficacy. P aeruginosa density was lowered after 6 months; severe acute exacerbations were reduced by 42%. CONCLUSION TNS reduced the inflammatory impact of P aeruginosa in multiresistant, P aeruginosa-colonized patients with severe COPD. A therapeutic role for TNS can be strongly suggested in these particular conditions.
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