In one of the most rigorously conducted ecological studies, Dahlberg and Lundin 16 showed a negative and statistically highly significant correlation between antidepressant prescriptions and the suicide rate between 1990 and 2000 in Sweden when other variables where not controlled for.
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Did the introduction and increased prescribing of antidepressants lead to changes in long-term trends of suicide rates?
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The sentences
The APC, based on the slope of the line segment, describes an increasing trend (positive APC value) or decreasing trend (negative APC value).
The nearest joinpoints following the introduction and widespread prescription of SSRIs that mark the beginning of a decreasing trend in suicide rates were 1994 in Swiss males and 1997 in Italian males (fluoxetine, the SSRI marking a new treatment era, was introduced 1991 in Switzerland and 1989 in Italy).