Evidence map›Paper›PMID 27186498›Full record

ArticleSpringerPlus2016

The bizzare phenomenon of smokers' paradox in the immediate outcome post acute myocardial infarction: an insight into the Malaysian National Cardiovascular Database-Acute Coronary Syndrome (NCVD-ACS) registry year 2006-2013.

Padmaa Venkatason, Norsabihin Mohd Salleh, Yong Zubairi, Imran Hafidz, Wan Azman Wan Ahmad, Sim Kui Han, Ahmad Syadi Mahmood Zuhdi

Open access · diamondAbstract read
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Article in SpringerPlus, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed
2.0field-weighted citation impact, top 12% 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

22 citing papers in PubMed, 40 citations in OpenAlex.

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  15. Smoking and Neuropsychiatric Disease-Associations and Underlying Mechanisms.International journal of molecular sciences · 2021
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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

7 authors at 2 institutions in 1 country.

Padmaa VenkatasonCardiology Unit, Department of Medicine, University Malaya Medical Centre, Kuala Lumpur, Malaysia.
Norsabihin Mohd SallehCardiology Unit, Department of Medicine, University Malaya Medical Centre, Kuala Lumpur, Malaysia.
Yong ZubairiCenter for Foundation Studies in Science, University of Malaya, Kuala Lumpur, Malaysia.
Imran HafidzCardiology Unit, Department of Medicine, University Malaya Medical Centre, Kuala Lumpur, Malaysia.
Wan Azman Wan AhmadCardiology Unit, Department of Medicine, University Malaya Medical Centre, Kuala Lumpur, Malaysia.
Sim Kui HanNational Heart Association of Malaysia, Jalan Tun Razak, Kuala Lumpur, Malaysia.
Ahmad Syadi Mahmood ZuhdiCardiology Unit, Department of Medicine, University Malaya Medical Centre, Kuala Lumpur, Malaysia.
University Malaya Medical Centre · MYUniversity of Malaya · MY

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

background'Smoker's paradox' is a controversial phenomenon of an unexpected favourable outcome of smokers post acute myocardial infarction. There are conflicting evidences from the literature so far. We investigate for the existence of this phenomenon in our post acute myocardial infarction patients.

methodsWe analysed 12,442 active smokers and 10,666 never-smokers diagnosed with STEMI and NSTEMI from the Malaysian National Cardiovascular Database-Acute Coronary Syndrome (NCVD-ACS) year 2006-2013 from 18 hospitals across Malaysia. Comparisons in the baseline characteristics, clinical presentation, in-hospital treatment and short term clinical outcome were made between the two groups. To compare the clinical outcome, an extensive multivariate adjustment was made to estimate the allcause mortality risk ratios for both groups.

resultsThe active smokers were younger (smokers 53.7 years vs non-smokers 62.3 years P < 0.001) and had lower cardiovascular risk burden and other co-morbidities. STEMI is more common in smokers and intravenous thrombolysis was the main reperfusion therapy in both groups. Smokers had a higher rate of in-hsopital coronary revascularisation in NSTEMI group (21.6 % smokers vs 16.7 % non-smokers P < 0.001) but similar to non-smokers in the STEMI group. Multivariate adjusted mortality risk ratios showed significantly lower mortality risks of smokers at both in-hospital (RR 0.510 [95 % CI 0.442-0.613]) and 30-day post discharge (RR 0.534 [95 % CI 0.437-0.621]).

conclusionSmoking seems to be associated with a favourable outcome post myocardial infarction. The phenomenon of 'smoker's paradox' is in fact a reality in our patients population. The definitive explanation for this unexpected protective effect of smoking remains unclear.

Identifiers

PMID27186498
PMCPMC4846599
OpenAlexW2343134876

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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.