Definition and research guide
This page combines a MeSH definition, publication statistics and selected research abstracts. It is a starting point for reading the literature, not a medical textbook or a systematic evidence review.
Content available: 4 complete abstracts (998 words), 10 references. Full article text is not stored or reproduced here; follow the PMID, DOI or PMC links to read the original sources and their access terms.
Definition
A measure of patient safety considering errors or mistakes which result in harm to the patient. They include errors in the administration of drugs and other medications (medication errors), errors in the performance of procedures or the use of other types of therapy, in the use of equipment, and in the interpretation of laboratory findings and preventable accidents involving patients.
Definition: NLM Medical Subject Headings (MeSH) scope note (Public domain (U.S. National Library of Medicine); attribution requested). View the MeSH record.
Also known as: Harms, Patient.
Where it fits in the MeSH classification
- Broader topics
- Safety; Public Health
Related concepts
Research landscape
PubMed indexes 255 records tagged with the MeSH heading “Patient Harm” (counts retrieved 2026-10-31). 91 of them (35.7%) were published from 2020 onward, and the busiest period so far is 2010-2019 with 167 records.
Reviews account for 29 records (11.4%) and meta-analyses for 2. Randomized controlled trials number 3 (1.2%) as a share of all records on the topic. Randomized trials make up only a small share of this literature, so much of what is known comes from laboratory, observational or descriptive work.
Show the data
| Period | Records |
|---|---|
| through 1999 | 0 |
| 2000-2009 | 0 |
| 2010-2019 | 167 |
| 2020 onward | 91 |
Publication-type chart data
| Type | Records | Share |
|---|---|---|
| Reviews | 29 | 11.4% |
| Meta-analyses | 2 | 0.8% |
| Randomized controlled trials | 3 | 1.2% |
Method: PubMed query "Patient Harm"[MeSH Terms] with publication-type and date filters, retrieved 2026-10-31.
Reading the evidence in public health and nutrition
Population and nutrition studies mostly observe what people eat, breathe or are exposed to and then look for links with health, which shows association and not proof of cause. Self-reported diet is imprecise, people who eat or live differently also differ in other ways, and effects measured across a population may not apply to one person. Check the study design, how exposure was measured, what else was accounted for and the size of the effect, not only whether it was statistically significant.
Evidence from open-access studies
These open-access studies come from PubMed’s best-match results for this heading (papers whose main topic it is), ranked here by citation count, with one recent addition. Each abstract is reproduced in full under its recorded open licence so that you can read the authors’ own words. They illustrate the literature; they are not a systematic summary of it. Citation counts measure attention, not reliability or clinical benefit.
| Study / authors | Year | Source label / design | Europe PMC citations | Licence / source |
|---|---|---|---|---|
| False Dawns and New Horizons in Patient Safety Research and Practice | 2017 | Research article Design not recorded in structured metadata | 38 | cc by PMID 29172374 · DOI · PMC5726317 |
| Patient harm associated with serial phlebotomy and blood waste in the intensive care unit: A retrospective cohort study | 2021 | Research article Design not recorded in structured metadata | 34 | cc by PMID 33439871 · DOI · PMC7806151 |
| Reporting of harms outcomes: a comparison of journal publications with unpublished clinical study reports of orlistat trials | 2016 | Meta-analysis Design not recorded in structured metadata | 31 | cc by PMID 27103582 · DOI · PMC4840982 |
| The incidence of avoidable healthcare-associated harm in prisons in England: a retrospective case note review | 2026 | Research article Design not recorded in structured metadata | 1 | cc by PMID 42097879 · DOI · PMC13539849 |
False Dawns and New Horizons in Patient Safety Research and Practice [1]
Abstract reading summary — source excerpts
- Opening excerpt
- In response to a weight of evidence that patients are frequently harmed as a result of their care, there have been concerted efforts to make healthcare safer, with health systems across the globe investing significant resources in policies and programmes designed to reduce adverse events.
- Closing excerpt
- Here, we highlight the limitations of the thinking which underpins current efforts to make healthcare systems safer and point to new and emerging approaches to understanding and addressing patient safety in complex, dynamic health systems.
- Interpretation limits
- Verbatim excerpts from the authors’ abstract; the closing excerpt may describe a finding, limitation or recommendation. Design, population, effect size and uncertainty have not been independently extracted or appraised. Read the complete abstract and linked paper before interpreting the findings.
Read complete abstract (111 words)
In response to a weight of evidence that patients are frequently harmed as a result of their care, there have been concerted efforts to make healthcare safer, with health systems across the globe investing significant resources in policies and programmes designed to reduce adverse events. Yet, despite extensive efforts, improvements in safety have proved difficult to sustain and spread, with studies confirming there has been no measurable, systems-level improvement in the overall rates of preventable harm. Here, we highlight the limitations of the thinking which underpins current efforts to make healthcare systems safer and point to new and emerging approaches to understanding and addressing patient safety in complex, dynamic health systems.
Abstract reproduced from the open-access article under the recorded cc by licence; © the authors. PMID 29172374 · DOI · PMC5726317
Patient harm associated with serial phlebotomy and blood waste in the intensive care unit: A retrospective cohort study [2]
Abstract reading summary — source excerpts
- Opening excerpt
- BackgroundIntensive care unit (ICU) patients are at high risk of anemia, and phlebotomy is a potentially modifiable source of blood loss.
- Closing excerpt
- Average ICU phlebotomy volume is independently associated with ICU acquired anemia and red blood cell transfusion which supports the need for phlebotomy stewardship programs.
- Interpretation limits
- Verbatim excerpts from the authors’ abstract; the closing excerpt may describe a finding, limitation or recommendation. Design, population, effect size and uncertainty have not been independently extracted or appraised. Read the complete abstract and linked paper before interpreting the findings.
Read complete abstract (242 words)
BackgroundIntensive care unit (ICU) patients are at high risk of anemia, and phlebotomy is a potentially modifiable source of blood loss. Our objective was to quantify daily phlebotomy volume for ICU patients, including blood discarded as waste during vascular access, and evaluate the impact of phlebotomy volume on patient outcomes.MethodsThis was a retrospective observational cohort study between September 2014 and August 2015 at a tertiary care academic medical-surgical ICU. A prospective audit of phlebotomy practices in March 2018 was used to estimate blood waste during vascular access. Multivariable logistic regression was used to evaluate phlebotomy volume as a predictor of ICU nadir hemoglobin ResultsThere were 428 index ICU admissions, median age 64.4 yr, 41% female. Forty-four patients (10%) with major bleeding events were excluded. Mean bedside waste per blood draw (144 draws) was: 3.9 mL from arterial lines, 5.5 mL central venous lines, and 6.3 mL from peripherally inserted central catheters. Mean phlebotomy volume per patient day was 48.1 ± 22.2 mL; 33.1 ± 15.0 mL received by the lab and 15.0 ± 8.1 mL discarded as bedside waste. Multivariable regression, including age, sex, admission hemoglobin, sequential organ failure assessment score, and ICU length of stay, showed total daily phlebotomy volume was predictive of hemoglobin ConclusionA substantial portion of daily ICU phlebotomy is waste discarded during vascular access. Average ICU phlebotomy volume is independently associated with ICU acquired anemia and red blood cell transfusion which supports the need for phlebotomy stewardship programs.
Abstract reproduced from the open-access article under the recorded cc by licence; © the authors. PMID 33439871 · DOI · PMC7806151
Reporting of harms outcomes: a comparison of journal publications with unpublished clinical study reports of orlistat trials [3]
Abstract reading summary — source excerpts
- Opening excerpt
- BackgroundThe quality of harms reporting in journal publications is often poor, which can impede the risk-benefit interpretation of a clinical trial.
- Closing excerpt
- Therefore, clinical study reports could support a more complete, accurate, and reliable investigation, and researchers undertaking evidence synthesis of harm outcomes should not rely only on incomplete published data that are presented in the journal publications.
- Interpretation limits
- Verbatim excerpts from the authors’ abstract; the closing excerpt may describe a finding, limitation or recommendation. Design, population, effect size and uncertainty have not been independently extracted or appraised. Read the complete abstract and linked paper before interpreting the findings.
Read complete abstract (359 words)
BackgroundThe quality of harms reporting in journal publications is often poor, which can impede the risk-benefit interpretation of a clinical trial. Clinical study reports can provide more reliable, complete, and informative data on harms compared to the corresponding journal publication. This case study compares the quality and quantity of harms data reported in journal publications and clinical study reports of orlistat trials.MethodsPublications related to clinical trials of orlistat were identified through comprehensive literature searches. A request was made to Roche (Genentech; South San Francisco, CA, USA) for clinical study reports related to the orlistat trials identified in our search. We compared adverse events, serious adverse events, and the reporting of 15 harms criteria in both document types and compared meta-analytic results using data from the clinical study reports against the journal publications.ResultsFive journal publications with matching clinical study reports were available for five independent clinical trials. Journal publications did not always report the complete list of identified adverse events and serious adverse events. We found some differences in the magnitude of the pooled risk difference between both document types with a statistically significant risk difference for three adverse events and two serious adverse events using data reported in the clinical study reports; these events were of mild intensity and unrelated to the orlistat. The CONSORT harms reporting criteria were often satisfied in the methods section of the clinical study reports (70-90 % of the methods section criteria satisfied in the clinical study reports compared to 10-50 % in the journal publications), but both document types satisfied 80-100 % of the results section criteria, albeit with greater detail being provided in the clinical study reports.ConclusionsIn this case study, journal publications provided insufficient information on harms outcomes of clinical trials and did not specify that a subset of harms data were being presented. Clinical study reports often present data on harms, including serious adverse events, which are not reported or mentioned in the journal publications. Therefore, clinical study reports could support a more complete, accurate, and reliable investigation, and researchers undertaking evidence synthesis of harm outcomes should not rely only on incomplete published data that are presented in the journal publications.
Abstract reproduced from the open-access article under the recorded cc by licence; © the authors. PMID 27103582 · DOI · PMC4840982
The incidence of avoidable healthcare-associated harm in prisons in England: a retrospective case note review [4]
Abstract reading summary — source excerpts
- Opening excerpt
- ObjectiveTo estimate the incidence of avoidable healthcare-associated harm for prisoners in England.
- Closing excerpt
- Delivering safe, equitable healthcare in secure environments remains a major challenge that demands focused attention.
- Interpretation limits
- Verbatim excerpts from the authors’ abstract; the closing excerpt may describe a finding, limitation or recommendation. Design, population, effect size and uncertainty have not been independently extracted or appraised. Read the complete abstract and linked paper before interpreting the findings.
Read complete abstract (286 words)
ObjectiveTo estimate the incidence of avoidable healthcare-associated harm for prisoners in England.DesignA retrospective cross-sectional case note review of prisoner healthcare records.Setting18 prisons in England were purposively sampled for maximum variation of characteristics based on prison category (open, local, training, high security and female), type (publicly and privately run) and population size.PopulationAfter screening 15 027 prisoner records, two cohorts were selected: a sample of 6294 'enhanced risk' prisoners and a random sample of 853 prisoners not included in the enhanced risk sample (n=7147).Main outcome measuresThe primary outcome was the incidence of patient harm per 100 000 patient-years, judged at least probably avoidable. The secondary outcome was the incidence of patient harm judged at least possibly avoidable. Cases of avoidable harm were characterised in terms of patient impact, known as patient outcome(s), and the severity of harm experienced.ResultsWithin 18 prisons, 247 cases of avoidable harm were experienced by 244 prisoners and were identified from 7147 patient records. The incidence of avoidable harm was 2241.4 (95% CI 1970.5 to 2539.0) per 100 000 patient-years, and this rate could be as high as 3412.0 (95% CI 3075.8 to 3774.9) based on the records screened during this study. Most patient outcomes involved prisoners experiencing discomfort and pain (99/247, 40.1%) and delays receiving appropriate healthcare management or assessment (91/247, 36.8%). The identified cases of avoidable healthcare-associated harm for prisoners resulted mainly in moderate harm severity (157/247 cases, 63.6%), followed by severe harm (27, 10.9%) and death (27, 10.9%).ConclusionsCompared with community settings, people in prison experience a 41-67 times greater risk of avoidable significant healthcare-associated harm. This stark disparity underscores the urgent need for government and policy action. Delivering safe, equitable healthcare in secure environments remains a major challenge that demands focused attention.
Abstract reproduced from the open-access article under the recorded cc by licence; © the authors. PMID 42097879 · DOI · PMC13539849
Key reviews and meta-analyses
The most cited review-type papers among PubMed’s best-match results for this heading, listed with bibliographic details only. Follow the links for the full text and access terms.
- Research article A new, evidence-based estimate of patient harms associated with hospital care [5]
- Research article Prevalence, severity, and nature of preventable patient harm across medical care settings: systematic review and meta-analysis [6]
- Research article Medication errors: an overview for clinicians [7]
- Research article How Effective Are Incident-Reporting Systems for Improving Patient Safety? A Systematic Literature Review [8]
- Research article Principles of Pediatric Patient Safety: Reducing Harm Due to Medical Care [9]
- Research article Agency for Healthcare Research and Quality Evidence-based Practice Center methods provide guidance on prioritization and selection of harms in systematic reviews [10]
References
- Mannion R, Braithwaite J. False Dawns and New Horizons in Patient Safety Research and Practice. . 2017. PMID 29172374 · DOI · PMC5726317
- Bodley T, Chan M, Levi O, Clarfield L, Yip D, Smith O, et al.. Patient harm associated with serial phlebotomy and blood waste in the intensive care unit: A retrospective cohort study. . 2021. PMID 33439871 · DOI · PMC7806151
- Hodkinson A, Gamble C, Smith CT. Reporting of harms outcomes: a comparison of journal publications with unpublished clinical study reports of orlistat trials. . 2016. PMID 27103582 · DOI · PMC4840982
- McFadzean IJ, Ibrahim S, Wainwright V, Panagioti M, Jordan M, Flynn S, et al.. The incidence of avoidable healthcare-associated harm in prisons in England: a retrospective case note review. . 2026. PMID 42097879 · DOI · PMC13539849
- James JT. A new, evidence-based estimate of patient harms associated with hospital care. J Patient Saf. 2013. PMID 23860193 · DOI
- Panagioti M, Khan K, Keers RN, Abuzour A, Phipps D, Kontopantelis E, et al.. Prevalence, severity, and nature of preventable patient harm across medical care settings: systematic review and meta-analysis. BMJ. 2019. PMID 31315828 · DOI · PMC6939648
- Wittich CM, Burkle CM, Lanier WL. Medication errors: an overview for clinicians. Mayo Clin Proc. 2014. PMID 24981217 · DOI
- Stavropoulou C, Doherty C, Tosey P. How Effective Are Incident-Reporting Systems for Improving Patient Safety? A Systematic Literature Review. Milbank Q. 2015. PMID 26626987 · DOI · PMC4678941
- Mueller BU, Neuspiel DR, Fisher ERS, COUNCIL ON QUALITY IMPROVEMENT AND PATIENT SAFETY, COMMITTEE ON HOSPITAL CARE. Principles of Pediatric Patient Safety: Reducing Harm Due to Medical Care. Pediatrics. 2019. PMID 30670581 · DOI
- Chou R, Baker WL, Bañez LL, Iyer S, Myers ER, Newberry S, et al.. Agency for Healthcare Research and Quality Evidence-based Practice Center methods provide guidance on prioritization and selection of harms in systematic reviews. J Clin Epidemiol. 2018. PMID 29409913 · DOI
About this article
- Sources
- NLM Medical Subject Headings (definition, synonyms); NCBI PubMed (counts, identifiers); Europe PMC (open-access abstracts and citation counts).
- Verification
- Every reference was resolved against PubMed on 2026-11-04; title, year and DOI matched.
- Review state
- automated source verified; no human expert review has been recorded yet.
- Version
- 1, last updated 2026-11-04.
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Evidence strength
EvidenceHelix's computed view of the study designs behind this topic: how common meta-analyses, randomized trials and reviews are, how recent the literature is, and a plain-language reading. It describes the design mix of the literature. It is not a quality appraisal of any study, and it is not medical advice.