Predicting the Course of Chronic Obstructive Pulmonary Disease (COPD) in Primary Care

NCT00706602 | Unknown

• 2 other identifiers: 3233B0-1152163.4.07.045
• Study Type: observational
• Target: 450
• Locations: 1 country
• Sites: 1

Brief Summary

Background: COPD is a systemic illness; morbidity and mortality due to this disease are on the increase, and it has great impact on patients' lives. Most COPD patients are managed by general practitioners (GP). GPs base their initial assessment of patients' disease severity mainly on lung function and then inform patients about adequate treatment. However, lung function correlates poorly with COPD-specific health-related quality of life and exacerbation frequency. Preventive cardiology embraced risk index-guided treatment successfully. COPD disease severity indices that better represent the clinical manifestations of COPD are needed that can be used to guide risk-stratified treatment. Objectives: (1) The development and validation of a practical COPD disease severity index to predict the course of health-related quality of life over time. (2) The validation of the ADO-Index (Age, Dyspnea, Obstruction) to predict 3-year mortality in COPD patients in primary care. (3) Link evidence on treatment effects to the COPD risk indices to guide COPD treatment selection. Methods: We are in the process of conducting two linked prospective cohort studies with 413 COPD patients (GOLD stages 2-4) from GPs in Switzerland and the Netherlands. We performed a sound baseline assessment including detailed patient history, lung function, measurement of exercise capacity and blood sampling. During the follow-up of at least five years, we update the patients' profile by registering health status, exacerbations and health-related quality of life and, after 2 years, lung function and measurement of exercise capacity. For aim 1, we will identify the best combination of variables predicting the course of health-related quality of life over time using multivariable regression analysis. For aim 2, we will assess discrimination and calibration of the ADO index to predict 3-year mortality. For aim 3, we will estimate treatment effects for individual patient profiles using complex statistical models such as Markov models. Significance of project: After this study, different risk scores will be available for use in primary care so that general practitioners can estimate what impact COPD will have on the patients. By linking these risk scores to evidence form treatment studies, it will be possible to show for an individual patient how COPD and different treatments impacts on mortality, symptoms and exacerbations. Thereby, patients and physicians can make more informed treatment decisions balancing the benefits and downsides of different treatments.

Conditions

COPD

Keywords

COPD; prognosis; prediction rule; health-related quality of life; risk factors; derivation; validation; exacerbation; mortality; primary care; treatment; decision making

Outcome Measures

Primary Outcomes (1)

• Chronic Respiratory Questionnaire

  At least 5 years

Secondary Outcomes (1)

• Exacerbation

  At least 5 years

Study Arms (2)

1

Swiss COPD cohort

2

Dutch COPD cohort

Eligibility Criteria

• Age: 40 Years+
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)
• Sampling Method: Non-Probability Sample

Study Population

COPD patients from primary care. Patients are identified through electronic or paper-based patient charts and by participating general practitioners.

You may qualify if:

• Patients ≥40 years of age with COPD in GOLD stage II to IV (postbronchodilator FEV1/FVC≤0.70, postbronchodilator FEV1≤80% predicted) are eligible if in- or outpatient treatment of their last exacerbation ended ≥4 weeks ago.

You may not qualify if:

• Patients who received mechanical ventilation in the previous 12 months (because of extremely poor prognosis), patients with co-morbidities associated with a life expectancy of ≤12 months, patients diagnosed with dementia, psychosis or other psychiatric illness that invalidate assessment of patient-reported parameters and patients who cannot complete thr baseline assessment due to language difficulties.

Sponsors & Collaborators

• University of Zurich: lead
• Swiss National Science Foundation: collaborator
• Zurich Lung League: collaborator
• The Netherlands Asthma Foundation: collaborator

Study Sites (1)

Institute for primary care, University of Zurich

Zurich, Canton of Zurich, 8091, Switzerland

Location

Related Publications (9)

• Siebeling L, ter Riet G, van der Wal WM, Geskus RB, Zoller M, Muggensturm P, Joleska I, Puhan MA. ICE COLD ERIC--International collaborative effort on chronic obstructive lung disease: exacerbation risk index cohorts--study protocol for an international COPD cohort study. BMC Pulm Med. 2009 May 6;9:15. doi: 10.1186/1471-2466-9-15.

  PMID: 19419546 BACKGROUND

• Tai AS, Liao LH, Lin SH. On the Conventional Definition of Path-specific Effects: Fully Mediated Interaction With Multiple Ordered Mediators. Epidemiology. 2022 Nov 1;33(6):817-827. doi: 10.1097/EDE.0000000000001520. Epub 2022 Jun 24.

  PMID: 36220579 DERIVED

• Steurer-Stey C, Dalla Lana K, Braun J, Ter Riet G, Puhan MA. Effects of the "Living well with COPD" intervention in primary care: a comparative study. Eur Respir J. 2018 Jan 4;51(1):1701375. doi: 10.1183/13993003.01375-2017. Print 2018 Jan.

  PMID: 29301921 DERIVED

• Strassmann A, Frei A, Haile SR, Ter Riet G, Puhan MA. Commonly Used Patient-Reported Outcomes Do Not Improve Prediction of COPD Exacerbations: A Multicenter 4(1/2) Year Prospective Cohort Study. Chest. 2017 Dec;152(6):1179-1187. doi: 10.1016/j.chest.2017.09.003. Epub 2017 Sep 18.

  PMID: 28923760 DERIVED

• Crook S, Frei A, Ter Riet G, Puhan MA. Prediction of long-term clinical outcomes using simple functional exercise performance tests in patients with COPD: a 5-year prospective cohort study. Respir Res. 2017 Jun 2;18(1):112. doi: 10.1186/s12931-017-0598-6.

  PMID: 28578705 DERIVED

• Frei A, Siebeling L, Wolters C, Held L, Muggensturm P, Strassmann A, Zoller M, Ter Riet G, Puhan MA. The Inaccuracy of Patient Recall for COPD Exacerbation Rate Estimation and Its Implications: Results from Central Adjudication. Chest. 2016 Oct;150(4):860-868. doi: 10.1016/j.chest.2016.06.031. Epub 2016 Aug 26.

  PMID: 27400907 DERIVED

• Frei A, Muggensturm P, Putcha N, Siebeling L, Zoller M, Boyd CM, ter Riet G, Puhan MA. Five comorbidities reflected the health status in patients with chronic obstructive pulmonary disease: the newly developed COMCOLD index. J Clin Epidemiol. 2014 Aug;67(8):904-11. doi: 10.1016/j.jclinepi.2014.03.005. Epub 2014 Apr 29.

  PMID: 24786594 DERIVED

• Puhan MA, Siebeling L, Frei A, Zoller M, Bischoff-Ferrari H, Ter Riet G. No association of 25-hydroxyvitamin D with exacerbations in primary care patients with COPD. Chest. 2014 Jan;145(1):37-43. doi: 10.1378/chest.13-1296.

  PMID: 24008868 DERIVED

• Puhan MA, Siebeling L, Zoller M, Muggensturm P, ter Riet G. Simple functional performance tests and mortality in COPD. Eur Respir J. 2013 Oct;42(4):956-63. doi: 10.1183/09031936.00131612. Epub 2013 Mar 21.

  PMID: 23520321 DERIVED

MeSH Terms

Conditions

Pulmonary Disease, Chronic Obstructive

Condition Hierarchy (Ancestors)

Lung Diseases, Obstructive; Lung Diseases; Respiratory Tract Diseases; Chronic Disease; Disease Attributes; Pathologic Processes; Pathological Conditions, Signs and Symptoms

Study Officials

• Milo A Puhan, MD PhD

  University of Zurich, Switzerland

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: observational
• Observational Model: COHORT
• Time Perspective: PROSPECTIVE
• Sponsor Type: OTHER

Study Record Dates

• First Submitted: June 25, 2008
• First Posted: June 27, 2008
• Study Start: May 1, 2008
• Primary Completion: August 1, 2014
• Study Completion: August 1, 2014
• Last Updated: June 28, 2010

Record last verified: 2010-06

Locations

CH (1)