[tz] Daylight saving and heart attacks

Paul Eggert eggert at cs.ucla.edu
Mon Jun 24 19:33:16 UTC 2019

On 6/24/19 10:40 AM, Arthur David Olson wrote:
> https://www.youtube.com/watch?v=XZGs5Im9f8Q
That cites a primary study[1] that spawned a bunch of work, recently 
reviewed by researchers in Italy. Their bottom line is that "These 
results support the presence of an association between DST and a modest 
increase of AMI ["heart attack"] occurrence, especially for the spring 
shift, and with no definite gender specific differences."[2] and "The 
risks of AMI increases modestly but significantly after DST transitions"[3].

To my mind the more-concerning health effects of daylight-saving time 
occur not during the twice-yearly transitions, but during the time that 
DST is in effect - which is the whole year when a location uses 
"permanent DST". Unfortunately these effects have not been studied as 
much, although experts are warning us that these effects are worrisomely 
negative (see, e.g., [4]).

[1] Sandhu A, Seth M, Gurm HS. Daylight savings time and myocardial 
infarction. Open Heart. 2014 Mar 28;1(1):e000019. 

[2] Manfredini R, Fabbian F, De Giorgi A et al. Daylight saving time and 
myocardial infarction: should we be worried? A review of the evidence. 
Eur Rev Med Pharmacol Sci. 2018 Feb;22(3):750-755. 

[3] Manfredini R, Fabbian F, Cappadona R et al. Daylight Saving Time and 
Acute Myocardial Infarction: A Meta-Analysis. J Clin Med. 2019 Mar 
23;8(3). https://dx.doi.org/10.3390/jcm8030404 

[4] Watson NF. Time to Show Leadership on the Daylight Saving Time 
Debate. J Clin Sleep Med. 2019 Jun 15;15(6):815-817. 

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