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Evidence that latitude is directly related to variation in suicide rates
George E Davis1, Walter E Lowell
1Augusta Mental Health Institute, Augusta, Maine, USA. george.davis@state.me.us
Canadian Journal of Psychiatry. Revue Canadienne De Psychiatrie
|September 6, 2002
Abstract
Objective:
To use available suicide-rate data from 20 countries to see patterns and relations more clearly.
Method:
We obtained raw suicide rates from the Organization for Economic Cooperation and Development (OECD) database from 1960 through 1997 and calculated averages and standard deviations.
Results:
There is a positive linear relation between the variation in suicide rate and geographic latitude.
Conclusions:
The variation in light-dark cycles is superimposed upon human mood.