On 6/24/19 10:40 AM, Arthur David Olson wrote:
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. https://dx.doi.org/10.1136/openhrt-2013-000019 https://openheart.bmj.com/content/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. https://dx.doi.org/10.26355/eurrev_201802_14306 https://www.europeanreview.org/article/14306 [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 https://www.mdpi.com/2077-0383/8/3/404 [4] Watson NF. Time to Show Leadership on the Daylight Saving Time Debate. J Clin Sleep Med. 2019 Jun 15;15(6):815-817. https://dx.doi.org/10.5664/jcsm.7822 http://jcsm.aasm.org/ViewAbstract.aspx?pid=31589