Show me someone who eagerly goes through 23+ years of school, and still eagerly seeks more - and I'll show you someone whose hobby is thinking.
I've always been the type of person who likes to think about things. Not just academic things; food, movies, books, art are all fair game. Sampling a carrot-ginger bisque at a farmers' market, my mind will try to pick apart the ingredients; coming across a snazzy web page, I'll ponder its construction; reading a thought-provoking essay in the New Yorker, I'll wonder how many caffeine-fueled hours of coffee-shop-loitering it took to produce that article. (For the record, people who tell you they love to write are usually lying: writing itself is like slow torture, but the finished product is usually well worth it).
I've heard that thinking too much is the root of all misery, the flip side of the "ignorance is bliss" argument. (Or, perhaps, that is something I thought up while in a state of thought-induced angst.) Indeed, thinking has gotten me into trouble a few times (see: accidentally walking into glass doors, wandering into oncoming traffic at red light, struggling for eons over exactly which falafel joint to visit for lunch.) If the mind were a muscle, mine often feels like a marathon runner's toes: weathered, achy and bruised, under-appreciated and overused.
Maybe thinking isn't for the faint of heart. And yet, as the eternal optimist that I am, I see it as a the first step to positive change, to solving problems. It's hard to get to the stage of doing unless you know 1) what you want to do and 2) why it makes sense to do it. And thus, enter the stage of thinking.
In health, history supports this notion. A deadly cholera epidemic in London in the 1800s was unraveled by a physician who thought about the underlying pattern of cases - instead of simply treating every case as it appeared - and localized the source to a faulty water pump. A life-saving antibiotic, penicillin, was accidentally discovered by a scientist who thought about the strange mold that had grown on his bacteria cultures - instead of passively discarding it a spoiled experiment - and found that the mold actually killed bacteria.
Thinking is the championed cause of public health and preventive medicine. In a test tube, a bacteria triggers infection; a mutation of a cell incites cancer; an inherited faulty gene produces a characteristic disease. But in society, illness doesn't follow pure test-tube predictability. Public health physicians tease apart the puzzle of disease, outlining patterns of individual illness with tools of epidemiology. Recalling the words of esteemed epidemiologist Dr. Roy Acheson:: "Why did this person get this disease at this time?"
After seeing patients in the hospital, I'd spend many hours thinking about this question - about patients' differential experience of illness. I was inspired by the pockets of intelligence, quality and compassion present in the US medical system - the caring colleagues who put needs of patients before their own, mentors who patiently taught residents, episodes of high-quality care successfully healing patients with devastating disease. And yet, I was troubled by the gaps in health: patients who couldn't afford drugs or lacked insurance; who died, suffered through emergency surgery or were committed to expensive, lifelong drug therapy for preventable and easily fixable conditions.
I thought: why were some patients able to quit smoking, but not others? Why did some patients seem to end up on five different blood pressure medications, while others needed none? Why did certain patients return time and again to the emergency room with the same, chronic symptoms, while others were permanently cured?
Why, fundamentally, did some people seem to have better chances of better health?
Thinking led me to others thinking about the same questions, and I began finding clues: the role of environment and the community on health. Social influences - peer community, education, the "built environment" affects health by molding behavior, self-esteem, self-efficacy, and prioritization of health.
Take this 2006 study in the Public Library of Science, where researchers' analysis of health data revealed a United States of "Eight Americas" - eight broad geographic regions with strikingly different levels of health. They reported the following findings:
- The ten million Americans living in the healthiest region - "America 1" - enjoyed one of highest average life expectancies in the world, even higher than long-lived residents of Japan.
- Meanwhile, the residents in the "lower America" regions had average life expectancies "more typical of middle income or low-income countries". The lifespan difference separating groups at both extremes stretched to nearly thirty-five years.
- Most differences in the death rates were from differences in rates of violence, injury and chronic disease - in other words, conditions which could be treated or prevented.
- The gaps in health outcomes between groups - and the relative order of the groups - had not changed significantly since 1987.
- Insurance coverage ("access to care") and use of health care services (ie number of visits to a clinic or emergency room) did not fully explain the differences in health outcomes. That is, the difference in death rates separating groups was much greater than the difference in rates of health insurance coverage.
This national pattern of wide variation in health translates to the county and state level. "Shortened Lives", a groundbreaking 4-part series in the Contra Costa Times, reported on how decades of variation in life expectancy - and marked differences in rates of homicide, asthma, heart disease and cancer - separated Bay Area counties that were just digits apart in zip code:
- Life expectancies ranged from 87.1 years in the Walnut Creek suburb to 71 years in crime-heavy Sobrante Park outside of Oakland.
- Residents of "hardscrabble" East Bay neighborhoods had rates of heart disease and cancer almost tripling those in wealthier residents.
- Hospitalization rates for children with asthma soared in the lowest-income neighborhoods outside of Oakland, with nearly a fourth of children returning to the hospital within less than a year of being discharged.
- The variation was not a discrete "rich-are-healthy", "poor-are-unhealthy" pattern - it instead showed a gradient along the socioeconomic ladder. That is, middle class communities were healthier than poorer communities, but less healthy than the most affluent communities.
Further evidence highlights the reality that ethnic group and minority status arises as a predictor of health:
- A study comparing the health of African American and Caucasian residents in 256 U.S. metropolitan areas. found that African Americans had 81% higher premature death rates on average.
- A nationwide survey conducted by the CDC analyzed rates of disability and asked people to "rate" their own health. The survey found a distinct pattern by race: almost one-and-a-half-times the number of African-Americans and triple the number of Hispanic adults reported their health as "fair" or "poor" compared to white adults.
- In that same study, almost three times as many Native Americans experienced disabilities or mental health problems compared to Asian-Americans.
Why is the ethnic link to health is a fundamentally unnatural and illogical phenomenon?
Researchers who have dedicated their lives to the subject conclude that there exists no basic biological or genetic explanation for why health should differ so markedly based on skin color. Genes certainly play a role in some diseases. There are lists of genetic diseases known to concentrate in particular ethnic groups (lists which medical students nationwide are currently cramming to pass medical school): Tay Sachs disease in Ashkenazi Jews; sickle-cell anemia in African-Americans; hypokalemic periodic paralysis in Asian-Americans. And, there is even evidence that some ethnic groups respond uniquely to commonly prescribed medications.
But the vast ethnic health differences in death and disease don't arise from rarer genetic conditions like Tay Sachs disease or sickle cell anemia. They come from controllable things like smoking, homicide, heart disease.
Moreover, a fact of science is that simply having a gene does not guarantee its expression. (Twins with exactly the same genes, for example, have different health outcomes when placed in different environments. The study of how genes are expressed - epigenetics - is a whole, mysterious and fascinating field in itself.)
Repeatedly, studies confirm that biology and genes alone do not explain the variation in health by race, community or gender. In short, differences in people of the same ethnicity far exceeds the genetic variation between groups (one expert categorically notes, "race does not account for human genetic variation, which is continuous, complexly structured, constantly changing, and predominantly within races.") Some geneticists argue that skin color is a flimsy facade of difference - that there is, in fact, little real biologic basis for "race."
So it's not genes or biology, but social structures and community environments - the social determinants of health - that explain the patterns of health detailed above: the "Eight Americas", the ethnicity-health link, the zip-code predictor of lifespan.
I became motivated to make a difference in health by tackling these root causes, and that motivation led me to the Kaiser Permanente Community Medicine Fellowship. It's an amazing experience; every day, I tackle systems-based issues that undermine community health, while also delivering direct clinical care to patients in need.
But most rewarding is the group I work with: a talented, inspired and passionate group of fellows who work tirelessly to boost the health of the community they serve. Together, we work to improve the health context of our patients, transforming their vision for health and sustaining the work we do in the clinic setting.
In the entries to come, Community Medicine Fellows will share their knowledge and experiences: pictures, reflections, questions, dilemmas, and practical insights. This is a forum for interaction, discussion and learning - helping us to stay connected but also to teach each other and grow in the process of becoming compassionate physicians.
It's going to be a great year. Here's to making a difference.