Journal Club: How to Read, Analyze & Use Medical Literature — Written by Guest Author, Michael O'Brien, MD, NRP, FACEP, FAEMS, FAOM

Introduction

In modern medicine, staying current with evidence is essential. In austere, remote, or operational environments, it is mission-critical. Clinicians far from tertiary care must often decide with limited diagnostics, minimal specialist backup, and high variability in patient presentations. That makes the ability to critically evaluate medical literature — not simply read it — an indispensable skill. Evidence-based practice is only as strong as the clinician's ability to judge whether a study's conclusions are valid, applicable, and meaningful in resource-limited care.

1. Start with the right question

Before opening a paper, define the question you're trying to answer. Are you looking for the best treatment for a common condition when confirmatory testing isn't available? Field-appropriate diagnostics? Risk-benefit when evacuation is delayed? Interventions that need minimal equipment?

A focused clinical question — often framed with PICO (Patient, Intervention, Comparison, Outcome) — filters out irrelevant studies. In austere contexts, the question must also weigh feasibility. A new sepsis protocol might look promising, but is it workable without continuous lactate monitoring or a full ICU team? The literature may offer solutions, but your environment shapes what is achievable.

2. Triage the article before reading deeply

Reading every paper in full is inefficient. Triage first.

Abstract: scan for the main question, study type, primary outcomes, and key findings — but never rely on it alone. Abstracts often overstate benefits, minimize limitations, and rarely mention negative results.

Introduction: look for why the study was done, what gap it fills, and whether the authors clearly define their hypothesis. If it seems disconnected from your clinical question or from austere realities, the study may be low-yield.

3. Know your study types

Different questions require different designs. Know which supply strong evidence and which merely suggest possibilities.

High-value for clinical decisions: randomized controlled trials (best for assessing interventions, though often limited by real-world applicability); systematic reviews and meta-analyses (useful summaries when done well).

Useful but limited: cohort and case-control studies (good for risk factors and associations); case series and reports (helpful for uncommon presentations or resource-limited adaptations, but not strong evidence).

Red flags: no control group; industry-funded trials with opaque methodology; trials of devices or drugs unavailable outside the hospital. Understand the hierarchy — but remember that "weaker" evidence may still be useful if it's realistic for your setting.

4. Analyze the methods (the heart of critical appraisal)

This is where many readers gloss over — and where the truth hides.

• Population: Who was studied? Are they like your patients? Were the critically ill excluded? Would the intervention be feasible in a remote, resource-constrained context?
• Intervention: Is it feasible with the supplies, training, and time you have? Does it require imaging or labs that may not exist in the field?
• Comparison group: Was the comparator appropriate? "Usual care" at a major academic center may be dramatically different from your version of usual care.
• Outcomes: Are they clinically meaningful? Mortality, evacuation rates, symptom resolution, and functional status matter more than surrogate outcomes like biomarker changes.
• Randomization and blinding: Done properly? Were participants and clinicians blinded? If not, were other safeguards used?
• Follow-up: Length should match the condition studied, and high loss-to-follow-up can bias results.

Methods determine validity. Weak methods cannot be redeemed by strong conclusions.

5. Evaluate the results: the numbers that matter

Focus on effect size, precision, and clinical relevance — not just statistical significance.

• Absolute Risk Reduction (ARR) and Number Needed to Treat (NNT): how many patients you must treat for one to benefit — crucial when resources are scarce.
• Relative Risk (RR) and Odds Ratios (OR): useful, but can exaggerate perceived benefit.
• Confidence Intervals (CI): narrow CIs mean more precision; wide CIs mean uncertainty, often making findings unreliable.

For austere medicine: does the intervention reduce mortality or morbidity enough to justify carrying extra supplies? Does it shorten recovery and ease the strain on limited resources? Is the risk of adverse events manageable where evacuation is delayed?

6. Interrogate the discussion and conclusions

Authors often present optimistic interpretations. Check that their conclusions match the data: Do they acknowledge limitations? Over-generalize beyond their population? Disclose conflicts of interest? Discuss practical constraints? Even with strong data, ask whether the intervention is sustainable in your setting, whether it needs refrigeration, electricity, or advanced monitoring, and whether it introduces a risk you can't mitigate in the field. Critical reading means separating what the data suggest from what the authors argue they show.

7. Apply the evidence to austere environments

This is where critical thinking meets operational reality. Consider:

• Feasibility: can you realistically implement it with your gear, personnel, environment, and time?
• Cost vs. benefit: weight, volume, complexity, and training requirements are all forms of cost in remote medicine.
• Protocol flexibility: does the evidence support safe, guideline-consistent modification when standard requirements can't be met?
• Patient differences: are your patients younger, older, more traumatized, or less monitored than trial participants?
• Evacuation constraints: does the evidence still help when evacuation is delayed or impossible?

Sometimes the best evidence-based decision is to modify an intervention rather than adopt or reject it outright.

8. Build a habit of ongoing critical reading

• Read one article per week.
• Rotate your focus: methodology review, statistics review, clinical-relevance review.
• Create topic- or specialty-based folders (hemorrhage control, hypothermia, prolonged field care) in your browser or reference manager to collect articles relevant to your operational or research focus.
• Convert passive storage into active understanding: pull at least one finding or insight from each article into a dedicated living document, and cite it correctly for efficient recall.
• Keep a log of "field-compatible evidence" for common conditions.
• Follow summaries from organizations focused on wilderness, tactical, prehospital, or austere medicine.

Conclusion

In austere and operational environments, the stakes are high and resources are low. Sound decisions depend not on the volume of literature consumed, but on the rigor of analysis applied to it. By reading with purpose, critiquing methodology, evaluating results critically, and translating findings into the realities of remote care, clinicians can provide care that is both evidence-based and context-appropriate. That is the essence of sound medical evaluation and treatment when conditions are least forgiving.

About the contributors

The Academy of Operational Medicine advances the science, practice, and leadership of operational medicine through education, applied research, and global collaboration. Learn more at faom.org.

The Longship Medic. Sean McFadden — known by his YouTube channel name "The Longship Medic" — is a former Naval Special Warfare Special Operations Combat Medic and SWCC boat operator with 11.5 years of service. He earned a BS in Biology from the University of Texas at San Antonio in 2024 and is completing an MS in Regenerative and Stem Cell Technologies at Johns Hopkins University. His research, conducted in academic settings and with the U.S. Air Force's 59th Medical Wing, focuses on regenerative medicine, battlefield care, and medical evacuation. He is an aspiring physician and biotechnology entrepreneur driven to move advanced medical treatments as close to the point of injury as possible.