The Paradox of Disease Prevention

Introduction

Prevention is highly valued in principle but often resisted in practice.
This resistance is paradoxical because prevention has significantly contributed to increased human longevity.
Early modern humans (25,000-40,000 years ago) had an average life expectancy in their mid-twenties.
By the early 20th century, life expectancy increased by another 25 years (approximately 1 year per millennium).
In the 20th century, life expectancy in developed countries increased by another 25 years due to:
- Accelerating economic growth
- Improved sanitation
- Recognition of infectious diseases
- Better nutrition and living conditions
- Widespread use of vaccines and antimicrobials
Non-communicable diseases accounted for two-thirds of deaths worldwide by 2010, increasing the importance of chronic disease prevention.

Contrasting Curative and Preventive Medicine

Curative Medicine:
- Focuses on diagnosis and treatment of individual patients with symptoms.
- Aims to restore patients to their previous state of health.
- Primary responsibility is to the individual patient.
- Solutions involve prescribing medication, performing operations, or delivering other clinical therapies.
Preventive Medicine:
- Starts at the population level and translates information to the individual.
- Focuses on risk rather than pathology.
- Aims to shift the entire population-wide distribution to a healthier level.
- Focuses on responsibility to the entire community.
- Involves a wider array of possibilities, from changing behavior choices to altering social conditions, in addition to clinical interventions.

Obstacles to Prevention

Prevention is difficult to put into practice due to several obstacles:
- Success is invisible.
- Lacks drama.
- Often requires persistent behavior change.
- May be long delayed.
- Statistical lives have little emotional effect.
- Benefits often do not accrue to the payer.
- Avoidable harm is accepted as normal.
- Preventive advice may be inconsistent.
- Bias against errors of commission may deter action.
- Prevention is expected to produce a net financial return, whereas treatment is expected only to be worth its cost.
- Commercial interests may conflict with disease prevention.
- Personal, religious, or cultural beliefs may conflict with disease prevention.

Success Is Invisible

It is impossible to prove that an individual's preventive efforts directly improved their health.
Success in prevention leads to an absence of events, making it difficult to demonstrate its effectiveness.
Example: The human papillomavirus (HPV) vaccine.
Invisible success can lead to decreased immunization rates and disease outbreaks.
Example: Pertussis outbreaks in California.

Lack of Drama

Curative interventions are often dramatic and exciting, while prevention lacks such visible drama.
Tragedies that could have been prevented are often overlooked.
Satisfaction needs to be derived from the absence of drama for prevention to be successful.

Statistical Lives

Statistical lives have little emotional effect compared to individual stories.
Personal stories evoke emotional connections, while statistics remain abstract numbers.
Example: "Baby Jessica" being stuck in a well received extensive news coverage, while impoverished children do not receive similar attention.
Every health statistic represents a person, but emotionally, it is just a number.

Long Delay Before Rewards Appear

Prevention often involves delayed gratification, which is difficult for many people.
People prefer immediate rewards over delayed payoffs.
Analogy: The marshmallow experiment with 4-year-olds.
Cartoon example: Patient asking for an operation instead of adopting long-term lifestyle changes.
Delayed payoffs are often discounted due to uncertainty about the future.

Benefits Often Do Not Accrue to the Payer

The party paying for preventive care often does not reap the rewards of reduced disease burden in the future.
Insurance companies may not invest in preventive services if the payoff is long-term.
Hospitals may be reluctant to invest in community-based diabetes management programs that reduce hospitalization rates because they would lose inpatient revenue.
Incentives are misaligned in a system designed to treat disease after it occurs.
Health reform aims to align financial incentives with superior care, including prevention.

Changing or Inconsistent Preventive Advice

Preventive advice can change over time as science progresses, leading to public confusion.
Example: Debate over mammography guidelines, where refined advice was misinterpreted as a lack of care for women in their 40s.
The value of preventive screening depends on the risk of disease, the frequency and consequences of error, and the ability to detect and act accordingly.
Some recommendations are more stable, like the harmful effects of cigarettes, while others, like nutritional counseling, may evolve.

Persistent Behavior Change May Be Required

Sustained behavior change is essential for realizing the benefits of prevention.
Adhering to healthy decisions day after day is challenging.

Bias Against Errors of Commission

People feel differently about adverse consequences resulting from action compared to those from natural causes, even if preventable.
Hypothetical scenario: A worldwide avian flu pandemic and choices about vaccination.
Most people regret errors of commission (actions that cause harm) more than errors of omission (failures to prevent harm).
Benjamin Franklin's regret over not inoculating his son against smallpox illustrates this point.

Acceptance of Avoidable Harm as Normal

People often accept avoidable harm as normal, which hinders the implementation of preventive strategies.
Examples: Murders, automobile collisions, and historical acceptance of smoking.
Efforts like Sweden's Vision Zero aim to eliminate highway fatalities, challenging the acceptance of avoidable harm.

Double Standard in Evaluation

Therapeutic interventions are evaluated based on whether they work and at what cost.
Preventive interventions are often expected to produce net savings in resources, creating a double standard.

Commercial Conflicts of Interest

Commercial interests can conflict with disease prevention.
Example: Tobacco companies promoting their products despite evidence of harm.
Commercial interests can be distorting and problematic, even when promoting effective preventives, such as the HPV vaccine.
Realignment of incentives could allow for both profits and greater health.

Conflicts With Personal, Religious, and Cultural Beliefs

Preventive strategies may conflict with religious or personal beliefs.
Examples: Opposition to condoms for preventing STDs, faith healing.
These conflicts make prevention a more difficult sell.

Strategies to Overcome Obstacles

Six strategies to support prevention:
- Pay for prevention.
- Make prevention cheaper than free.
- Involve employers.
- Reengineer to reduce need for individual action.
- Use policy to make the right choices easier.
- Use multiple channels to educate, reframe, and elicit positive change.

Pay for Prevention

Align incentives so clinicians are paid for preventive care.
Successful examples: Immunizations in children.
Apply this to other forms of care: nutritional counseling, physical therapy, and health counseling.

Make Prevention Cheaper Than Free

Establish incentives for individuals and families to take preventive measures.
Example: Mexico's Oportunidades program, which rewards low-income families with cash transfers for getting regular checkups and vaccinations.
Expand financial incentives for insurance, bonuses for staying tobacco-free, and rewards for maintaining a healthy body weight.

Involve Employers

Employers can significantly influence population health.
View prevention as an investment in the workforce.
Example: Johnson & Johnson's worksite health promotion program, which reduced health care costs and improved employee health.
Differential insurance premiums based on health behaviors can promote individual health and control employer costs.

Reengineer to Reduce Need for Individual Action

Engineering can increase health and safety.
Examples: Airbags in cars, antilock brakes, multiple-dose vaccines in single doses.
Involve engineers in both curative and preventive medicine.

Use Policy to Make the Right Choices Easier

Policies can improve local health.
Examples: Laws and regulations governing bike helmets, water fluoridation, manufacturing requirements.
Policies to reduce salt, eliminate trans fats, and reduce sugar can lower population-wide risk of hypertension, cardiovascular disease, and diabetes.
Example: New York City's ban on smoking in public places and increased taxes on cigarettes.

Use Multiple Media Channels to Educate, Reframe, and Elicit Positive Change

Strategic communication and dialogue can pave the way for successful adoption of regulations to prevent disease.
Avoidable health risks need to be exposed, and a culture that celebrates healthy choices should be established.
Prevention needs to be reframed: Costs of commission and omission should be seen as equal, standards for measuring the value of prevention and treatment should be comparable, and statistics should be humanized.
Traditional media, web-based, and social media should be mobilized as well as the entertainment industry.
Unconventional use of communication tools can yield positive returns.
Example: CDC's graphic novella on the zombie invasion to inform the public about pandemic preparedness.
Align with a person's beliefs and desires and incorporate prevention into a daily habit.

Conclusion

Preventive messages must be repeated across many forms of media and entertainment to become solidified over time as cultural norms.
Success will require a sustained effort from individuals, families, health professionals, celebrities, employers, insurers, political leaders, public agencies, and philanthropies.
Prevention is truly worth the investment to make a difficult sell just a little easier and to put everyone on the road to a healthier future.