Evidence map›Paper›PMID 28435244›Full record

ArticleInternational journal of chronic obstructive pulmonary disease2017

Accelerometer- versus questionnaire-based assessment of physical activity and their changes over time in patients with COPD.

Noriane A Sievi, Thomas Brack, Martin H Brutsche, Martin Frey, Sarosh Irani, Jörg D Leuppi, Robert Thurnheer, Malcolm Kohler, Christian F Clarenbach

Open access · goldAbstract readComparative StudyMulticenter Study
In one paragraph

Article in International journal of chronic obstructive pulmonary disease, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed
3.5field-weighted citation impact, top 7% of its field
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

14 citing papers in PubMed, 29 citations in OpenAlex.

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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

9 authors at 8 institutions in 3 countries.

Noriane A SieviPulmonary Division, University Hospital of Zurich, Zurich.
Thomas BrackPulmonary Division, Cantonal Hospital of Glarus, Glarus.
Martin H BrutschePulmonary Division, Cantonal Hospital of St Gallen, St Gallen.
Martin FreyPulmonary Division, Clinic Barmelweid.
Sarosh IraniPulmonary Division, Cantonal Hospital of Aarau, Aarau.
Jörg D LeuppiUniversity Clinic of Internal Medicine, Cantonal Hospital Baselland.
Robert ThurnheerPulmonary Division, Cantonal Hospital of Münsterlingen, Münsterlingen.
Malcolm KohlerPulmonary Division, University Hospital of Zurich, Zurich.
Christian F ClarenbachPulmonary Division, University Hospital of Zurich, Zurich.
University Hospital of Zurich · CHHosparus · USKantonsspital Aarau · CHKantonsspital Baselland · CHKantonsspital Münsterlingen · CHKlinik Barmelweid · CHUniversity of St.Gallen · CHUniversity of Zurich · CH

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

BACKGROUND AND

objectivePhysical activity (PA) is an important outcome parameter in patients with COPD regarding hospitalizations and mortality. Both objective assessment by accelerometers and self-evaluation by questionnaires were used in studies investigating PA in COPD. Whether self-reported questionnaires can adequately reflect PA and its changes over time compared to objective assessments has not been thoroughly investigated in COPD. In this COPD cohort study, we evaluated whether PA measured by accelerometer and its annual changes can also be assessed by self-reported questionnaires.

methodsIn 178 COPD patients with at least two assessments of PA, the agreement between objectively measured and self-reported activity was analyzed by Bland-Altman plots. Daily PA was assessed by a triaxial activity monitor over 1 week and by the self-reported German PA questionnaire 50+.

resultsComparison between the two methods of measurement revealed no convincing agreement with a mean difference and limits of agreement (±1.96 standard deviation [SD]) of time spent in at least moderate PA (>3 metabolic equivalent of task [MET]) of -77.6 (-340.3/185.2) min/day, indicating a self-reported overestimation of PA by the questionnaire. The mean difference and limits of agreement (±1.96SD) in the annual change of PA was 1.2 min/day (-208.2/282.6 min/day), showing also a poor agreement on an individual level.

conclusionEvaluation of objectively measured and self-reported PA and their annual changes revealed no agreement in patients with COPD. Therefore, the evaluated questionnaire seems not helpful for measurement of PA and its changes over time.

Indexed as

ActigraphyExerciseSelf ReportAgedExercise ToleranceFemaleFitness TrackersHumansLungMaleMiddle AgedPredictive Value of TestsPulmonary Disease, Chronic ObstructiveReproducibility of ResultsSwitzerlandTime Factorsactivity monitoractivity questionnaireairflow limitationCOPD

Identifiers

PMID28435244
PMCPMC5391993
OpenAlexW2605626004

What OpenQuestion holds

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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.