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In a total of 22,169 parasuicides over 19 years, there was evidence for a seasonal cycle in parasuicide admissions among women, with an increase during the summer and a fall over the winter, including a pronounced December nadir. Further analysis of the winter trough suggests a sociological explanation, the focal point being Christmas. There was no evidence for monthly or seasonal variation among men.
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George Masterton (1991) studied this question.
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