Transit Makes You Short

The Antiplanner’s faithful ally and frequent commenter, C.P. Zilliacus, alerted me to a recent paper published in the Journal of Transport and Health that proves that transit makes people short. Or, at least, it proves this in the same way that other studies have proven that transit makes people healthier or less obese.

The authors of the recent article, University of Minnesota engineers Alireza Ermagun and David Levinson (now at the University of Sydney) review data that “indicate transit use and accessibility by transit are significantly associated with general health.” However, “they are practically insignificant.” In other words, just because something is statistically significant doesn’t mean it is important.

To show this, they compared heights with transit use and show “that transit use and transit accessibility to jobs are negatively correlated with height.” In other words, transit riders are shorter than other people. “We could further engage in data-mining and test other seemingly unrelated phenomenon, and then cherry pick results,” they say. “We prefer not to do that.” Continue reading

Obamacare Pseudoscience

Last week, the Antiplanner noted in passing a study that found that making people live in “walkable neighborhood” won’t make them any healthier. Since then the Antiplanner has encountered another research paper that found that “the effects of density and block size on total walking and physical activity are modest to non-existent, if not contrapositive.” It seems that anyone who looks at the relationship between urban design and health, other than committed smart-growth advocates, finds that there is no relationship.

So it is disappointing, but not surprising, that President Obama’s recently released National Prevention Strategy–which resulted from the so-called Obamacare legislation–focuses on redesigning the built environment. The Active Living portion of the strategy calls for “community design and development that supports physical activity. Sidewalks, adequate lighting, and traffic slowing devices (e.g., modern roundabouts) improve the walkability of communities and promote physical activity. Increasing access to public transportation helps people maintain active lifestyles. People are also more likely to use active modes of transportation (e.g., walking, biking) for their daily activities when homes, workplaces, stores, schools, health care facilities, and other community services are located within close proximity and neighborhoods are perceived as safe.”
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Although the Strategy includes footnotes for each of these claims, they only reference other publications recommending changes in the built environment–some of which were written by advocacy groups such as the Surface Transportation Policy Project–and not actual research showing that this is a worthwhile or cost-effective strategy. The Antiplanner is not an expert on health care, but if the rest of Obama’s health care package is as “scientific” as this, it appears we have turned our entire medical system to Lysenkoists. Next time you see a doctor, don’t be surprised if he or she gives you a prescription based on the latest fad (or campaign contribution) rather than the latest research.