Article: Substitution of method in suicide and homicide: an ecological analysis.

I examined crude and age-adjusted rates of homicide and suicide for 1980 and 1990 for the 48 continental states. Methods of homicide were statistically associated with each other and with the total homicide rate. For 1980 and 1990 rates of suicide by poisons, hanging/strangulation, and other methods all correlated positively. Further, in 1980 all three of these rates correlated with the suicide rate by firearms, whereas in 1990 the latter two rates were negatively correlated. Of these two the only significant correlation was for the 1990 rates of suicide by firearms and other methods. There seems to be a tendency for persons in different regions to use one method or ...

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