Related Experiment Video
Updated: Mar 26, 2026
07:10
Home-Based Prescribed Pulmonary Exercise in Patients with Stable Chronic Obstructive Pulmonary Disease
Published on: August 24, 2019
10.6K
Co-calibrating quality-of-life scores from three pulmonary disorders: implications for comparative-effectiveness
M Rouse1, J Twiss1, S P McKenna1
1a Galen Research Ltd , Manchester , UK.
Journal of Medical Economics
|January 30, 2016
Summary
Disease-specific patient-reported outcome (PRO) measures can be co-calibrated, enabling valid comparisons across different diseases in comparative effectiveness research (CER). This allows for more accurate health resource utilization and outcome assessment.
Area of Science:
- Health outcomes research
- Psychometrics
- Comparative effectiveness research
Background:
- Accurate outcome assessment is crucial for efficient health resource allocation.
- Disease-specific patient-reported outcome (PRO) measures offer greater relevance than generic PROs.
- Current understanding suggests disease-specific measures are not suitable for comparative effectiveness research (CER).
Purpose of the Study:
- To provide evidence for the value of disease-specific PRO measures in cross-disease comparisons.
- To demonstrate the feasibility of co-calibrating different disease-specific PRO measures.
- To enhance the application of PROs in comparative effectiveness research.
Main Methods:
- The Asthma Life Impact Scale (ALIS), Living with Chronic Obstructive Pulmonary Disease (LCOPD), and Cambridge Pulmonary Hypertension Outcome Review (CAMPHOR) scales were administered to patient cohorts.
- Data from the three disease-specific PRO measures were analyzed for Rasch model fit individually and after combining unique items.
- Raw scores were co-calibrated, and a transformation table was generated to enable score comparison.
Main Results:
- All individual scales and the combined item set demonstrated good fit to the Rasch model.
- No differential item functioning was observed concerning age, gender, or disease.
- Co-calibrated scales effectively differentiated between patient-perceived severity groups (p < 0.001).
Conclusions:
- Co-calibration of scores from disease-specific PRO measures is feasible.
- This co-calibration facilitates more accurate and sensitive outcome measurement for CER.
- The method allows for the calculation of gamma (γ) scores to directly compare intervention impacts across diverse diseases.
Related Concept Videos
01:27Chronic Obstructive Pulmonary Disease-IV: Assessement and Diagnostic Studies
3.4K
Assessing and diagnosing Chronic Obstructive Pulmonary Disease (COPD) involves a detailed approach that includes a comprehensive review of medical history, physical examination, and a variety of diagnostic tests. This thorough evaluation is essential to ensure an accurate diagnosis and guide effective management strategies.
Medical History
Medical History
3.4K
01:25Pulmonary Function Tests
1.0K
Pulmonary Function Tests (PFTs)
Pulmonary Function Tests are crucial diagnostic tools for assessing respiratory function, particularly in patients with chronic respiratory disorders. They comprehensively evaluate lung volumes, ventilatory function, breathing mechanics, diffusion, and gas exchange. These tests help diagnose pulmonary diseases and play a significant role in monitoring disease progression, evaluating disability, and assessing response to therapy.
PFTs involve using a spirometer, a...
Pulmonary Function Tests are crucial diagnostic tools for assessing respiratory function, particularly in patients with chronic respiratory disorders. They comprehensively evaluate lung volumes, ventilatory function, breathing mechanics, diffusion, and gas exchange. These tests help diagnose pulmonary diseases and play a significant role in monitoring disease progression, evaluating disability, and assessing response to therapy.
PFTs involve using a spirometer, a...
1.0K
01:25Chronic Obstructive Pulmonary Disease-III: Symptoms and Complications.
4.1K
Understanding the variety of primary symptoms and systemic complications that characterize chronic obstructive pulmonary disease (COPD) is crucial for healthcare professionals.
Symptoms of COPD can be classified as primary or systemic. Primary symptoms relate to reduced airflow, while systemic or extrapulmonary symptoms relate to COPD's broader impact on the body.
Primary Symptoms of COPD:
Symptoms of COPD can be classified as primary or systemic. Primary symptoms relate to reduced airflow, while systemic or extrapulmonary symptoms relate to COPD's broader impact on the body.
Primary Symptoms of COPD:
4.1K
01:20Chronic Obstructive Pulmonary Disease-I: Introduction
4.1K
Chronic Obstructive Pulmonary Disease (COPD) is a long-lasting respiratory condition requiring continuous attention and care. It is a progressive lung disease that leads to breathing challenges due to airflow obstruction. It manifests as persistent respiratory symptoms and restricted airflow resulting from abnormalities in the airways and alveoli, usually due to long-term exposure to harmful particles or gases. COPD mainly consists of two primary conditions: emphysema and chronic bronchitis.
4.1K
01:24Chronic Obstructive Pulmonary Disease
3.1K
COPD is defined as a heterogeneous lung condition marked by persistent respiratory symptoms such as dyspnea, cough, and sputum production, caused by abnormalities in the airways that cause airflow obstruction.
Smoking is a primary risk factor for COPD, with over 80% of patients having a history of it. Patients typically experience progressive dyspnea or labored breathing, frequent coughing, and recurrent pulmonary infections. Many eventually succumb to respiratory failure, characterized by...
Smoking is a primary risk factor for COPD, with over 80% of patients having a history of it. Patients typically experience progressive dyspnea or labored breathing, frequent coughing, and recurrent pulmonary infections. Many eventually succumb to respiratory failure, characterized by...
3.1K
01:24Asthma-III: Symptoms and Complications
3.6K
Asthma, a common chronic respiratory condition, is classified considering the frequency and severity of symptoms alongside lung function impairment. Understanding this classification is essential for appropriate treatment and management. Here's a detailed look at the classification of asthma and its clinical features and complications:
Classification of Asthma
Classification of Asthma
3.6K