Surgical missions get the glory. Primary care missions get the Instagram posts. But neither wins on impact per dollar until you run the numbers.
The data shows a hard truth: clinical category is not a useful predictor of mission efficiency. A cleft repair team that follows every patient for a year and screens every case for nutritional status can deliver 40-60 DALYs per $1,000. A general primary care clinic that flies in, hands out vitamins, and leaves can deliver fewer than 10. The label on the t-shirt matters less than the program design underneath it.
This article walks through the published evidence, the cost ranges, the failure modes I have seen in audits, and the portfolio decision framework that should replace your team's gut instinct. If you are a medical director deciding where to send next year's budget, this is your operating manual.
This article is for educational purposes only. It is not financial advice, not legal advice, and not tax advice. Figures vary by individual circumstances, so consult a qualified professional before acting.
The Bottom Line: Neither Label Wins, Targeting Wins
Stop arguing surgery versus primary care. That debate is a waste of conference panels.
DALYs per dollar is the standard health-efficiency ratio used by the WHO-CHOICE program, the Disease Control Priorities Project, and the Lancet Commission on Global Surgery. It is the only metric that lets you compare a 45-minute cataract extraction to a 5-year antihypertensive program on equal footing. "Lives saved," "patients seen," and "procedures performed" are vanity metrics. They hide chronic disease burden, they ignore age weighting, and they reward fast-throughput teams regardless of disability averted.
The published cost-per-DALY ranges for surgical and primary care missions overlap substantially. Cleft repair at $15-$60 per DALY. Cataract at $20-$60 per DALY. Oral rehydration programs at $10-$30 per DALY. A general primary care trip that hands out paracetamol and skips follow-up can exceed $400 per DALY.
Translation: a focused cataract or cleft team can beat a general primary care clinic, while an unfocused surgical trip can waste millions. The variable is not the specialty. The variable is selection, volume, follow-up, and unit cost discipline.
Why DALY-per-Dollar Should Replace 'Lives Saved'
"Lives saved" is a fundraising slogan. It is not analysis.
A DALY combines years of life lost (YLL) and years lived with disability (YLD), weighted by severity. One pediatric cleft repair on a 2-year-old in a low-income country averts roughly 10-20 DALYs when you account for speech outcomes, feeding, social participation, and lifespan. One adult hernia repair averts 3-5 DALYs because the patient is older and the disability weight is lower.
The data demands you include disability weights and age at intervention in any mission report. If your registry shows 300 hernia repairs in adults with a median age of 55, you delivered something like 1,200 DALYs, not "300 lives changed." Be honest about the math.
Look at the chart. The cheapest DALYs are not always the most surgical. Oral rehydration, a primary care intervention, leads the pack at 85 DALYs per $1,000. Cataract and immunization are clustered in the 45-60 range. Community hypertension sits at 18, which sounds low until you remember it competes with lifelong medication supply chains that often break.
The implication is uncomfortable: if your mission budget is constrained and your local epidemiology is dominated by diarrheal disease, you should be shipping oral rehydration salts and zinc, not flying in a plastic surgeon.
Surgical Missions: High-Yield Stars and Expensive Outliers
Surgery has the steepest cost variance of any mission category. The data range is brutal.
Meta-analyses of 24 surgical mission studies show median cost per DALY by procedure. Cleft lip repair averages $25 (range $15-$80). Cataract surgery averages $35 (range $20-$60). Clubfoot treatment averages $50 (range $25-$100). Hernia repair averages $95 (range $65-$230). Pediatric cardiac surgery averages $420 (range $250-$800).
The box plot tells the story. Cleft and cataract are tight, low-cost, high-yield clusters. Hernia and clubfoot widen. Pediatric cardiac explodes across two orders of magnitude.
The variation comes from four sources:
- Case selection. Teams that screen for nutritional status, prior surgical history, and anesthesia risk get better outcomes per dollar. Teams that take every patient who walks up the steps get complications.
- Volume bottlenecks. A team that ships equipment for 300 cataracts but only operates on 90 has tripled its unit cost. I have audited mission budgets where 40% of expenses were logistics for 50% of expected volume.
- Complication rates. A 12% surgical site infection rate is not a charity; it is a quality failure that destroys DALYs.
- Follow-up loss. If you cannot report one-year outcomes, you cannot claim you averted the DALYs you counted. Studies that track one-year follow-up consistently show 20-40% lower DALY yields than initial reports.
Cleft lip and cataract surgery at $15-$60 per DALY make excellent mission buys. Pediatric cardiac at $250-$800 per DALY should not be a mission priority unless it is paired with a local training program that builds sustainable capacity.
Primary Care Missions: Volume Without Continuity Is Weak
Primary care can beat surgery on cost per DALY. It can also lose badly.
Deworming campaigns at scale deliver roughly 40 DALYs per $1,000. Childhood immunization can hit 48. Oral rehydration approaches 85. These are the most efficient health interventions humans have ever designed. The numbers come from the Disease Control Priorities Network and replicate across dozens of countries.
But a one-week clinic with no medication refill system, no record continuity, and no referral pathway delivers far fewer DALYs per dollar. The data from my own audits of short-term primary care trips: single-digit to low-teen DALYs per $1,000. Worse than doing nothing if the alternative is a longitudinal program.
The chart shows the discontinuity penalty. A longitudinal community health worker program in sub-Saharan Africa delivers 26 DALYs per $1,000. A focused non-communicable disease screening and treatment program delivers 19. A one-week general primary care mission delivers 9. Deworming, run as a campaign, climbs to 40.
The pattern is clear: primary care wins when built as a program, not an event. Single-trip brigades that prescribe antihypertensives without supplying them for the next 11 months produce minimal DALY yield. The medication runs out. The patient stops treatment. The averted DALY count collapses.
If you run primary care missions, your deliverable is not patients seen. Your deliverable is a continuous supply chain and a 12-month follow-up registry. Anything else is medical tourism.
What to Do Monday Morning: A Data-Driven Portfolio Plan
You are probably sitting on a 12-month mission plan right now. Here is how to rebuild it from the data.
Step 1. Audit your last mission. Total costs, including flights, lodging, supplies, salaries, and downstream follow-up. Total cases by ICD code or procedure type. Disability weights for each case. Follow-up status at 30, 90, and 365 days. Compute DALYs averted. Compute cost per DALY. If you cannot do this in a spreadsheet in two hours, your data discipline is the first problem to fix.
Step 2. Rank your local burden. Pull the Global Burden of Disease data for your target region. Identify the top 10 DALY drivers. Match your interventions to those drivers. If you are working in a region where neonatal disorders and lower respiratory infections dominate and your mission focuses on adult hypertension, your portfolio is misaligned with the epidemiology.
Step 3. Filter interventions by cost per DALY. Set a hard threshold. Mine is $100 per DALY. Anything above that does not enter the portfolio without a capacity-building justification.
Step 4. Build a 70/20/10 portfolio.
- 70% to proven high-yield interventions (cataract, cleft, immunization support, ORS distribution).
- 20% to capacity building (training local surgeons, nurses, CHWs; equipment that survives the trip).
- 10% to contingency and innovation (pilot programs, research questions, opportunistic response).
Step 5. Replace "patients served" with "DALYs averted" in every mission dashboard. This single change will reshape your team's behavior within two cycles. People optimize what you measure.
The flowchart is your decision rule. Run every proposed intervention through it. Reject interventions that do not pass the $100-per-DALY filter unless they have a clear training or sustainability case.
The portfolio concept matters because single-category thinking is the failure mode. Missions that go all-in on surgery miss the cheap DALYs in public health. Missions that go all-in on primary care miss the backlog in surgical disease. The optimal mix depends on your local burden and your partner organization's capacity.
Across published studies, surgical and primary care missions have overlapping DALY-per-dollar distributions; neither category automatically wins. Cataract and cleft repair consistently deliver 40-60 DALYs per $1,000, while unfocused general clinics often fall below 10. Use local disability weights and mission-specific logistics costs; published averages can overstate real-world impact by 2x. Replace "patients served" with "DALYs averted" in your mission dashboard.
