Evidence map›Paper›PMID 26038225›Full record

Trial reportQuality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation2015

The added effect of comorbidity on health-related quality of life in patients with asthma.

Wenjia Chen, Larry D Lynd, J Mark FitzGerald, Carlo A Marra, Roxanne Rousseau, Mohsen Sadatsafavi

Abstract readRandomized Controlled Trial
PubMed Publisher
In one paragraph

Trial report in Quality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed, 4 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

19 citing papers in PubMed, 4 syntheses or guidelines pooled it.

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  7. Impact of comorbidities on EQ-5D quality-of-life index in severe asthma.The journal of allergy and clinical immunology. Global · 2024
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  9. Predictors of change in asthma-related quality of life: a longitudinal real-life study in adult asthmatics.Quality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation · 2023
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors.

Wenjia ChenCollaboration for Outcomes Research and Evaluation, Faculty of Pharmaceutical Sciences, University of British Columbia, Vancouver, BC, Canada.
Larry D LyndCollaboration for Outcomes Research and Evaluation, Faculty of Pharmaceutical Sciences, University of British Columbia, Vancouver, BC, Canada.
J Mark FitzGeraldDivision of Respiratory Medicine, Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada.
Carlo A MarraCollaboration for Outcomes Research and Evaluation, Faculty of Pharmaceutical Sciences, University of British Columbia, Vancouver, BC, Canada.
Roxanne RousseauDivision of Respiratory Medicine, Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada.
Mohsen SadatsafaviDivision of Respiratory Medicine, Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada. mohsen.sadatsafavi@ubc.ca.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeTo examine the effect of comorbidities on health-related quality of life (HRQoL) and their interaction with asthma control.

methodsIn a random sample of adults with asthma, we measured generic (EQ5D) and disease-specific (AQ5D) utility scores. Asthma symptom control was determined using the 2014 Global Initiative for Asthma Management Strategy. Comorbidity scores were calculated using a validated questionnaire. We used two-part regression models to measure the adjusted difference in utility across levels of symptom control and comorbidity scores and to examine the relative role of symptom control and comorbidity in explaining the variation in HRQoL.

resultsA total of 2,299 observations from 460 adult patients (mean age 52 years, 67 % women) were included. Compared to controlled asthma, uncontrolled asthma was associated with -0.018 reduction (95 % CI -0.028, -0.009) in EQ5D and -0.076 reduction (95 % CI -0.115, -0.052) in AQ5D utilities. An increase by one standard deviation in comorbidity score relative to the mean was associated with a change of -0.029 (95 % CI -0.043, -0.016) in EQ5D and -0.010 (95 % CI -0.020, -0.004) in AQLQ utilities. The impact of comorbidity was greater than asthma symptom control in explaining EQ5D variance (12 vs. 1 %) but smaller in explaining AQ5D variance (3 vs. 12 %).

conclusionsGeneric and disease-specific HRQoL instruments differentially capture the impact of symptom control and comorbidity in asthma. The selection of HRQoL instruments for asthma studies should depend on the prevalence of comorbidity in the target population and the impact of interventions on asthma control and comorbidity.

Indexed as

AsthmaComorbidityFemaleHumansMaleMiddle AgedQuality of LifeSurveys and QuestionnairesAsthma controlComorbidityDisease-specific instrumentGeneric instrumentHealth-related quality of lifeUtility

Identifiers

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.