@article{ref1,
title="Circadian variation in suicide attempts in Tokyo from 1978 to 1985",
journal="Suicide and life-threatening behavior",
year="1990",
author="Motohashi, Y.",
volume="20",
number="4",
pages="352-361",
abstract="Circadian variations in suicide attempts in Tokyo from 1978 to 1985 were analyzed on the basis of records of the Ambulance Service of Tokyo. A significant circadian variation in suicide attempts was demonstrated by the cosinor method, power spectrum analysis (by the maximum-entropy method), and analysis of variance. The peak time for suicide attempts was established by cosinor analysis as about 1800 hours (6:00 P.M.). The circadian variation in suicide attempts seemed to be associated with endogenous rhythms such as mood, as well as with daily variation in social activities.",
language="",
issn="0363-0234",
doi="",
url="http://dx.doi.org/"
}