Evidence map›Paper›PMID 34493521›Full record

SynthesisBMJ open2021

Values and preferences towards medical cannabis among people living with chronic pain: a mixed-methods systematic review.

Linan Zeng, Lyubov Lytvyn, Xiaoqin Wang, Natasha Kithulegoda, Silvana Agterberg, Yaad Shergill, Meisam Abdar Esfahani, Anja Fog Heen, Thomas Agoritsas, Gordon H Guyatt and 1 more

Abstract readSystematic Review
In one paragraph

Synthesis in BMJ open, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed, 4 pooled it
–field-weighted citation impact
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

23 citing papers in PubMed, 4 syntheses or guidelines pooled it.

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  20. The Pharmacology of Cannabinoids in Chronic Pain.Medical cannabis and cannabinoids
    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

11 authors.

Linan ZengPharmacy Department/Evidence-based Pharmacy Center, West China Second University Hospital, Chengdu, Sichuan, China.ORCID 0000-0001-9892-2000
Lyubov LytvynDepartment of Health Research Methods, Evidence & Impact, McMaster University, Hamilton, Ontario, Canada.
Xiaoqin WangMichael G. DeGroote Institute for Pain Research and Care, McMaster University, Hamilton, Ontario, Canada.
Natasha KithulegodaInstitute for Health Policy, Management and Evaluation, University of Toronto, Toronto, Ontario, Canada.ORCID 0000-0001-6207-9699
Silvana AgterbergFerkauf Graduate School of Psychology, Yeshiva University, New York, New York, USA.
Yaad ShergillDepartment of Health Research Methods, Evidence & Impact, McMaster University, Hamilton, Ontario, Canada.
Meisam Abdar EsfahaniDepartment of Health Research Methods, Evidence & Impact, McMaster University, Hamilton, Ontario, Canada.
Anja Fog HeenDepartment of Medicine, Lovisenberg Diaconal Hospital, Oslo, Norway.
Thomas AgoritsasDepartment of Health Research Methods, Evidence & Impact, McMaster University, Hamilton, Ontario, Canada.ORCID 0000-0002-6182-9969
Gordon H GuyattDepartment of Health Research Methods, Evidence & Impact, McMaster University, Hamilton, Ontario, Canada.
Jason W BusseDepartment of Health Research Methods, Evidence & Impact, McMaster University, Hamilton, Ontario, Canada bussejw@mcmaster.ca.ORCID 0000-0002-0178-8712

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveTo explore values and preferences towards medical cannabis among people living with chronic pain.

designMixed-methods systematic review. DATA SOURCES: We searched MEDLINE, EMBASE and PsycINFO from inception to 17 March 2020. STUDY SELECTION: Pairs of reviewers independently screened search results and included quantitative, qualitative and mixed-methods studies reporting values and preferences towards medical cannabis among people living with chronic pain. REVIEW

methodsWe analysed data using meta-narrative synthesis (quantitative findings were qualitised) and tabulated review findings according to identified themes. We used the Grading of Recommendations Assessment, Development and Evaluation approach to assess certainty of evidence.

resultsOf 1838 initial records, 15 studies proved eligible for review. High to moderate certainty evidence showed that patient's use of medical cannabis for chronic pain was influenced by both positive (eg, support from friends and family) and negative social factors (eg, stigma surrounding cannabis use). Most patients using medical cannabis favoured products with balanced ratios of tetrahydrocannabinol (THC) and cannabidiol (CBD), or high levels of CBD, but not high THC preparations. Many valued the effectiveness of medical cannabis for symptom management even when experiencing adverse events related to concentration, memory or fatigue. Reducing use of prescription medication was a motivating factor for use of medical cannabis, and concerns regarding addiction, losing control or acting strangely were disincentives. Out-of-pocket costs were a barrier, whereas legalisation of medical cannabis improved access and incentivised use.Low to very low certainty evidence suggested highly variable values towards medical cannabis among people living with chronic pain. Individuals with pain related to life-limiting disease were more willing to use medical cannabis, and preferred oral over inhaled administration.

conclusionsOur findings highlight factors that clinicians should consider when discussing medical cannabis. The variability of patients' values and preferences emphasise the need for shared decision making when considering medical cannabis for chronic pain.

Indexed as

CannabidiolCannabisChronic PainMedical MarijuanaDronabinolHumansCannabidiolDronabinolMedical Marijuanageneral medicine (see internal medicine)pain managementqualitative research

Identifiers

PMID34493521
PMCPMC8451285

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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.