[tz] Daylight saving and heart attacks
eggert at cs.ucla.edu
Tue Jun 25 00:06:31 UTC 2019
On 6/24/19 4:15 PM, Tim Parenti wrote:
> I would think, in that case, the magnitude of those effects on health
> data would be sufficiently small that they would likely be dwarfed by
> the broader public health trends of the time.
One way to tease out the effects of daylight saving time is to look at
the health records of people near a time zone boundary, as you get a
one-hour civil-time difference for free. As far as I know this sort of
work was pioneered in 2011 by Mikhail Borisenkov of the Komi Science
Center, who found that in Russia position within a time zone explained
15% of the variability in female breast cancer mortality. Similar
results have been found in the US, as I mentioned in 2017 on this
mailing list <https://mm.icann.org/pipermail/tz/2017-November/025548.html>.
More recently, researchers have used this technique to find that a
one-hour time difference suppresses voting by 2-5%. See:
Holbein JB, Shafer JP, Dickinson DL. Insufficient sleep reduces voting
and other prosocial behaviors. 2019. Nat Hum Behav 3, 492-500.
So it appears that daylight saving time causes cancer and keeps voters
away from the polls, in addition to its other effects.
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