Evidence map›Paper›PMID 22003290›Full record

ArticleInternational journal of chronic obstructive pulmonary disease2011

Long-term azithromycin therapy in patients with severe COPD and repeated exacerbations.

Xavier Pomares, Concepción Montón, Mateu Espasa, Jordi Casabon, Eduard Monsó, Miguel Gallego

Open access · goldAbstract read
In one paragraph

Article in International journal of chronic obstructive pulmonary disease, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 29 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
29citing papers in PubMed, 2 pooled it
6.2field-weighted citation impact, top 4% 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

29 citing papers in PubMed, 2 syntheses or guidelines pooled it, 74 citations in OpenAlex.

  1. Effects of long-term macrolide therapy at low doses in stable COPD.International journal of chronic obstructive pulmonary disease · 2019
    Pooled it
  2. Guideline
  3. Trial
  4. Trial
  5. Article
  6. The Effect of Erythromycin in Macrolide-resistantCurrent pharmaceutical biotechnology · 2025
    Article
  7. Review
  8. Article
  9. Review
  10. Review
  11. Review
  12. Article
  13. Review
  14. Article
  15. Article
  16. Article
  17. Chronic obstructive pulmonary disease subpopulations and phenotyping.The Journal of allergy and clinical immunology · 2018
    Review
  18. Review
  19. Review
  20. Impact and prevention of severe exacerbations of COPD: a review of the evidence.International journal of chronic obstructive pulmonary disease · 2017
    Review
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 at 2 institutions in 1 country.

Xavier PomaresPneumology Service, Corporació Parc Taulí, Universitat Autònoma de Barcelona, Sabadell, Spain. jpomares@tauli.cat
Concepción Montón
Mateu Espasa
Jordi Casabon
Eduard Monsó
Miguel Gallego
Centro de Investigación Biomédica en Red de Enfermedades Respiratorias · ESUniversitat Autònoma de Barcelona · ES

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe aim of this study was to determine whether long-term intermittent azithromycin therapy reduces the frequency of exacerbation in severe chronic obstructive pulmonary disease (COPD).

methodsWe retrospectively investigated the clinical benefits of long-term azithromycin (500 mg orally three times per week) over 12 months in patients with severe COPD and a minimum of four acute exacerbations (AECOPD) per year or chronic bronchial colonization by Pseudomonas aeruginosa, comparing the number of AECOPD, hospitalizations due to respiratory disease, days of hospital stay, and bacterial infections during azithromycin treatment and in the year prior to this therapy.

resultsTwenty patients who completed the 12-month treatment period were analyzed. No clinically significant adverse events were observed during azithromycin treatment. Compared with baseline data, azithromycin therapy significantly reduced the number of AECOPD (2.8 ± 2.5 versus 6.8 ± 2.8, P < 0.001), hospitalizations (1.4 ± 1.5 versus 3.6 ± 1.4, P < 0.001), and cumulative annual days of hospital stay (25 ± 32.2 versus 43.7 ± 21.4, P = 0.01). The improvement was particularly significant in patients with exacerbations caused by common potentially pathogenic microorganisms, who had 70% fewer AECOPD and hospitalizations. Patients colonized by P. aeruginosa had reductions of 43% in AECOPD and 47% in hospitalizations.

conclusionLong-term azithromycin is well tolerated and associated with significant reductions in AECOPD, hospitalizations, and length of hospital stay in patients with severe COPD.

Indexed as

Administration, OralAgedAnti-Bacterial AgentsAzithromycinChi-Square DistributionDrug Administration ScheduleHospitalizationHumansLength of StayMiddle AgedPseudomonas aeruginosaPulmonary Disease, Chronic ObstructiveRetrospective StudiesSeverity of Illness IndexSpainSputumAnti-Bacterial AgentsAzithromycinazithromycinchronic obstructive pulmonary diseaseexacerbationmacrolides

Identifiers

PMID22003290
PMCPMC3186743
OpenAlexW1811434524

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.