Evidence map›Paper›PMID 32665389›Full record

ArticleBMJ open2020

Non-conveyance in the ambulance service: a population-based cohort study in Stockholm, Sweden.

Jakob Lederman, Veronica Lindström, Carina Elmqvist, Caroline Löfvenmark, Therese Djärv

Open access · goldAbstract read
In one paragraph

Article in BMJ open, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 33 papers.

0numbers the graph read from it
0cells of the map it votes in
33citing papers in PubMed
6.8field-weighted citation impact, top 2% 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

33 citing papers in PubMed, 61 citations in OpenAlex.

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  8. An analysis of ambulance re-contacts after non-conveyance: a retrospective cohort study in the Netherlands.Scandinavian journal of trauma, resuscitation and emergency medicine · 2025
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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

5 authors at 3 institutions in 1 country.

Jakob LedermanDepartment of Clinical Science and Education, Södersjukhuset, Karolinska Institutet, Stockholm, Sweden jakob.lederman@ki.se.ORCID 0000-0001-9180-161X
Veronica LindströmDepartment of Neurobiology, Care Sciences and Society, Section of Nursing, Karolinska Institutet, Stockholm, Sweden.
Carina ElmqvistDepartment of Health and Caring Sciences, Faculty of Health and Life Sciences, Linnaeus University, Växjö, Sweden.
Caroline LöfvenmarkDepartment of Health Promoting Science, Sophiahemmet University College, Stockholm, Sweden.
Therese DjärvDepartment of Medicine, Solna, Karolinska Institutet, Stockholm, Sweden.
Karolinska Institutet · SELinnaeus University · SESophiahemmet University College · SE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectivesNon-conveyed patients represent a significant proportion of all patients cared for by ambulance services in the western world. However, scientific knowledge on non-conveyance is sparse. Therefore, the aim of this study was to describe the prevalence of non-conveyance, investigate associations and compare patients' characteristics, drug administration, initial problems and vital signs between non-conveyed and conveyed patients.

designA population-based retrospective cohort study.

settingThe study setting area, Stockholm, Sweden, has a population of 2.3 million inhabitants, with seven emergency hospitals. Annually, approximately 210 000 assignments are performed by 73 ambulances. All ambulance assignments performed from 1 January to 31 December 2015 were included.

resultsIn total, 23 603 ambulance assignments ended in non-conveyance-13.8% of all ambulance assignments performed in 2015. Compared with conveyed patients, non-conveyed patients were younger and more often female (median age 50.1 years for non-conveyed vs 61.7 years for conveyed; female=52 %, both p values <0.001). Approximately half of all ambulance assignments ending in non-conveyance were initially prioritised and dispatched as the highest priority. Non-conveyed patients were more often assessed by ambulance clinicians as presenting non-specific symptoms or symptoms related to psychiatric problems. Low blood glucose levels were highly associated with non-conveyance (adjusted OR (AOR): 15; 95 % CI 11.18 to 20.13), although non-conveyed patients presented abnormal vital signs across all categories of vital signs. Moreover, drugs were more often administered to younger non-conveyed patients. Older patients were more often conveyed and administered drugs once conveyed (AOR: 1.29; 95 % CI 1.07 to 1.56).

conclusionsThis study shows that non-conveyed patients represent a non-negligible proportion of all patients in contact with ambulance services. In general, most cases of non-conveyance occur at the highest dispatch level, to a large extent involve younger patients, and features problems assessed by ambulance clinicians as non-specific or related to psychiatric symptoms.

Indexed as

AmbulancesEmergency Medical ServicesAdolescentAdultAgedCohort StudiesFemaleHumansMaleMiddle AgedSwedenYoung Adultaccident & emergency medicineepidemiologystatistics & research methods

Identifiers

PMID32665389
PMCPMC7365423
OpenAlexW3043008958

What OpenQuestion holds

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LicenceCC BY-NC
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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.