(Newser) -
Suicide rates among middle-aged Americans have spiked dramatically in recent years, in contrast to flat or declining rates in younger and older demographics, mystifying experts, reports the New York Times . For people 45 to 54, the rate jumped 20% between 1999 and 2004; for women, the increase was 31%. Theories about the cause include lack of support systems, declining hormone-replacement therapy use, and prevalence of prescription painkillers .
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