Evidence map›Paper›PMID 16670173›Full record

ArticleThorax2006

Bronchial hyperresponsiveness and the development of asthma and COPD in asymptomatic individuals: SAPALDIA cohort study.

M H Brutsche, S H Downs, C Schindler, M W Gerbase, J Schwartz, M Frey, E W Russi, U Ackermann-Liebrich, P Leuenberger, SAPALDIA Team

Open access · bronzeAbstract read
In one paragraph

Article in Thorax, 2006. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 49 papers.

0numbers the graph read from it
0cells of the map it votes in
49citing papers in PubMed
6.0field-weighted citation impact, top 3% 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

49 citing papers in PubMed, 188 citations in OpenAlex.

  1. Trial
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  6. Review
  7. Cough-Variant Asthma: A Review of Clinical Characteristics, Diagnosis, and Pathophysiology.The journal of allergy and clinical immunology. In practice · 2025
    Review
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
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  15. Longitudinal predictors of bronchial hyperresponsiveness and FEVInternational archives of occupational and environmental health · 2021
    Article
  16. Article
  17. Review
  18. Article
  19. Article
  20. Article
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

10 authors at 1 institution in 2 countries.

M H BrutschePneumologie, University Hospital Basel, Petersgraben 4, CH-4031 Basel, Switzerland. mbrutsche@uhbs.ch
S H Downs
C Schindler
M W Gerbase
J Schwartz
M Frey
E W Russi
U Ackermann-Liebrich
P Leuenberger
SAPALDIA Team
Hospital Base · CL

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundBronchial hyperresponsiveness (BHR) is a common feature of asthma. However, BHR is also present in asymptomatic individuals and its clinical and prognostic significance is unclear. We hypothesised that BHR might play a role in the development of chronic obstructive pulmonary disease (COPD) as well as asthma.

methodsIn 1991 respiratory symptoms and BHR to methacholine were evaluated in 7126 of the 9651 participants in the SAPALDIA cohort study. Eleven years later 5825 of these participants were re-evaluated, of whom 4852 performed spirometric tests. COPD was defined as an FEV1/FVC ratio of <0.70.

resultsIn 1991 17% of participants had BHR, of whom 51% were asymptomatic. Eleven years later the prevalence of asthma, wheeze, and shortness of breath in formerly asymptomatic subjects with or without BHR was, respectively, 5.7% v 2.0%, 8.3% v 3.4%, and 19.1% v 11.9% (all p<0.001). Similar differences were observed for chronic cough (5.9% v 2.3%; p = 0.002) and COPD (37.9% v 14.3%; p<0.001). BHR conferred an adjusted odds ratio (OR) of 2.9 (95% CI 1.8 to 4.5) for wheezing at follow up among asymptomatic participants. The adjusted OR for COPD was 4.5 (95% CI 3.3 to 6.0). Silent BHR was associated with a significantly accelerated decline in FEV1 by 12 (5-18), 11 (5-16), and 4 (2-8) ml/year in current smokers, former smokers and never smokers, respectively, at SAPALDIA 2.

conclusionsBHR is a risk factor for an accelerated decline in FEV1 and the development of asthma and COPD, irrespective of atopic status. Current smokers with BHR have a particularly high loss of FEV1.

Indexed as

AdultAnalysis of VarianceAsthmaBronchial HyperreactivityCohort StudiesDyspneaFemaleForced Expiratory VolumeHumansMalePulmonary Disease, Chronic ObstructiveRespiratory SoundsVital Capacity

Identifiers

PMID16670173
PMCPMC2104688
OpenAlexW2135414619

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

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.