Cold Weather and Cardiac Arrest in 4 Seasons: Helsinki, Finland, 1997‒2018.

Niilo R I Ryti, Jouni Nurmi, Ari Salo, Harri Antikainen, Markku Kuisma, Jouni J K Jaakkola

Open access · greenAbstract read

In one paragraph

Article in American journal of public health, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it

0cells of the map it votes in

8citing papers in PubMed, 2 pooled it

0.8field-weighted citation impact, top 29% 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

8 citing papers in PubMed, 2 syntheses or guidelines pooled it, 14 citations in OpenAlex.

Association between ambient temperature and out-of-hospital cardiac arrest: a systematic review and meta-analysis.BMC cardiovascular disorders · 2026
Pooled it
Air Pollution and Temperature: a Systematic Review of Ubiquitous Environmental Exposures and Sudden Cardiac Death.Current environmental health reports · 2023
Pooled it
Temperature-attributable mortality projections under scenarios of climate change for Oslo, Norway.BMC public health · 2026
Article
Influence of extreme temperatures on out-of-hospital cardiac arrest cases in Hungary: a national time-series analysis.Resuscitation plus · 2026
Article
The role of contributing factors, triggers, and prodromal symptoms in the etiological classification of out-of-hospital cardiac arrest; A scoping review.PloS one · 2025
Article
Air temperature and humidity impact out-of-hospital-cardiac-arrests in Germany: A 10-year cohort study from the German Resuscitation Registry.Resuscitation plus · 2024
Article
Prediction of emergency department presentations for acute coronary syndrome using a machine learning approach.Scientific reports · 2024
Article
Risk of ischemic and hemorrhagic stroke in relation to cold spells in four seasons.BMC public health · 2023
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

6 authors at 1 institution in 1 country.

Niilo R I RytiNiilo R. I. Ryti is with the Center for Environmental and Respiratory Health Research (CERH), Faculty of Medicine, University of Oulu, and Medical Research Center Oulu, University of Oulu and Oulu University Hospital, Oulu, Finland. Jouni Nurmi, Ari Salo, and Markku Kuisma are with the Department of Emergency Medicine and Services, Helsinki University Hospital, Helsinki, Finland. Harri Antikainen is with the Geography Research Unit, University of Oulu. Jouni J. K. Jaakkola is with CERH, Faculty of Medicine, University of Oulu, and Medical Research Center Oulu, University of Oulu and Oulu University Hospital, and the Finnish Meteorological Institute, Helsinki.

Jouni NurmiNiilo R. I. Ryti is with the Center for Environmental and Respiratory Health Research (CERH), Faculty of Medicine, University of Oulu, and Medical Research Center Oulu, University of Oulu and Oulu University Hospital, Oulu, Finland. Jouni Nurmi, Ari Salo, and Markku Kuisma are with the Department of Emergency Medicine and Services, Helsinki University Hospital, Helsinki, Finland. Harri Antikainen is with the Geography Research Unit, University of Oulu. Jouni J. K. Jaakkola is with CERH, Faculty of Medicine, University of Oulu, and Medical Research Center Oulu, University of Oulu and Oulu University Hospital, and the Finnish Meteorological Institute, Helsinki.

Ari SaloNiilo R. I. Ryti is with the Center for Environmental and Respiratory Health Research (CERH), Faculty of Medicine, University of Oulu, and Medical Research Center Oulu, University of Oulu and Oulu University Hospital, Oulu, Finland. Jouni Nurmi, Ari Salo, and Markku Kuisma are with the Department of Emergency Medicine and Services, Helsinki University Hospital, Helsinki, Finland. Harri Antikainen is with the Geography Research Unit, University of Oulu. Jouni J. K. Jaakkola is with CERH, Faculty of Medicine, University of Oulu, and Medical Research Center Oulu, University of Oulu and Oulu University Hospital, and the Finnish Meteorological Institute, Helsinki.

Harri AntikainenNiilo R. I. Ryti is with the Center for Environmental and Respiratory Health Research (CERH), Faculty of Medicine, University of Oulu, and Medical Research Center Oulu, University of Oulu and Oulu University Hospital, Oulu, Finland. Jouni Nurmi, Ari Salo, and Markku Kuisma are with the Department of Emergency Medicine and Services, Helsinki University Hospital, Helsinki, Finland. Harri Antikainen is with the Geography Research Unit, University of Oulu. Jouni J. K. Jaakkola is with CERH, Faculty of Medicine, University of Oulu, and Medical Research Center Oulu, University of Oulu and Oulu University Hospital, and the Finnish Meteorological Institute, Helsinki.

Markku KuismaNiilo R. I. Ryti is with the Center for Environmental and Respiratory Health Research (CERH), Faculty of Medicine, University of Oulu, and Medical Research Center Oulu, University of Oulu and Oulu University Hospital, Oulu, Finland. Jouni Nurmi, Ari Salo, and Markku Kuisma are with the Department of Emergency Medicine and Services, Helsinki University Hospital, Helsinki, Finland. Harri Antikainen is with the Geography Research Unit, University of Oulu. Jouni J. K. Jaakkola is with CERH, Faculty of Medicine, University of Oulu, and Medical Research Center Oulu, University of Oulu and Oulu University Hospital, and the Finnish Meteorological Institute, Helsinki.

Jouni J K JaakkolaNiilo R. I. Ryti is with the Center for Environmental and Respiratory Health Research (CERH), Faculty of Medicine, University of Oulu, and Medical Research Center Oulu, University of Oulu and Oulu University Hospital, Oulu, Finland. Jouni Nurmi, Ari Salo, and Markku Kuisma are with the Department of Emergency Medicine and Services, Helsinki University Hospital, Helsinki, Finland. Harri Antikainen is with the Geography Research Unit, University of Oulu. Jouni J. K. Jaakkola is with CERH, Faculty of Medicine, University of Oulu, and Medical Research Center Oulu, University of Oulu and Oulu University Hospital, and the Finnish Meteorological Institute, Helsinki.

Oulu University Hospital · FI

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

PubMed holds no abstract for this paper.

Indexed as

Cold TemperatureSeasonsWeatherAdultAgedEpidemiologic Research DesignFemaleFinlandHumansMaleMiddle AgedOut-of-Hospital Cardiac Arrest

Identifiers

PMID34936410

DOI10.2105/AJPH.2021.306549

PMCPMC8713612

OpenAlexW4200361989

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.