Did the Train Noise Contribute to the Suicides?

Editor’s Note: This article previously appeared in a different format as part of The Atlantic’s Notes section, retired in 2021.

A reader writes:

There are probably so many reasons for teen suicide, but one that I keep coming back to is sleep deprivation. Sleep deprivation is a form of TORTURE. Among everything else we should be trying to do to help kids, one biggie is to help them get enough sleep.

How is it that all these parents, many of whom are moms who know about sleep deprivation and post-partum depression, aren’t wising up to the sleep-depression connection? For example: “One study found that sleep disturbance alone — even after controlling for other risk factors — increased women’s likelihood of developing postpartum depression.” Look, I’m not trying to oversimplify, but it boggles my mind that no one’s really talking about the role of sleep in all this.

Hanna actually mentions the sleep factor many times in her cover story, but it’s worth highlighting more. From Hanna: “[T]he American Academy of Pediatrics had recommended in 2014 starting high school no earlier than 8:30, because studies show that a host of adolescent mental-health issues are related to insufficient sleep.” Here's more from The Atlantic on those AAP recommendations. And here are a few links to prominent studies on the sleep-suicide connection:

For more than a hundred years, experts have recognized interrelated connections between sleep, depression and suicide: At least three-quarters of clinically depressed people struggle with sleep, and insomnia is a well-proven risk factor for suicide across different cultures and age groups. Moreover, sleep disturbances increase the likelihood of non-depressed people becoming depressed. We don’t yet have any tidy divine theory to tie these pieces together, but researchers are working hard to get us there.  

Another reader wonders if the Caltrain running through Palo Alto had an indirect effect on the teens who took their own lives:

Reading Rosin’s article, I kept coming back to the omnipresence of the train itself and the sound pollution from the train. Sound pollution is an environmental stressor that affects health in a variety of ways—disrupting sleep, increasing cortisol levels, etc. Sound pollution may have more profound impacts on those who are more sound sensitive or already stressed. It could be one of the factors that needs to be investigated and addressed. There is plenty of research on sound pollution and health, though it seems to be largely ignored in the U.S.

That reminds me of this haunting passage from Hanna’s piece:

As Kathleen [Blanchard] and I talked in her living room, I heard a train send out its alarm, and she caught my startled look. “My son died right there,” she said, pointing out the window. The tracks were a block from the house. He’d grown up to the sound of the train, while brushing his teeth, doing his homework, falling asleep—every 20 minutes or so. That morning, she’d dropped him off at school and he’d walked right to the tracks.