According to a new study published in the appropriately titled Journal of Pain, women, on average, experience higher levels of pain than their male counterparts — and by a large margin. What's the evidence? Here, a guide:
How was this study conducted?
Researchers analyzed the electronic medical records of 11,000 men and women who were patients at the Stanford Hospital and Clinics. They specifically looked at how each person rated their pain on a 0 ("no pain") to 11 ("worst pain imaginable") scale — sifting through a total of more than 161,000 pain scores. The study included patients suffering from 47 different disorders and 250 different diagnoses, ranging from cancer to back conditions to infectious diseases.
And women felt more pain?
Yes. Women's pain scores in nearly each one of the diseases were, on average, 20 percent higher than men's scores, says Rachael Rettner at Mother Nature Network. The most surprising finding, says Dr. Atul Butte, the study's lead author, is that this was the case across nearly every disorder. Pain was particularly more potent for women in the lower back, knee, neck muscles, and sinuses.
Hormones may account for the gender gap, says Alice Park at TIME. Estrogen in women can dampen the activity of pain receptors, which, on its face, would allow women to actually tolerate higher levels of pain. However, that also means "they may become more sensitive to pain during low-estrogen parts of the menstrual cycle."
Any other explanations?
The observed difference might not be biological at all. Men may be compelled by cultural stereotypes to appear tough about pain, and therefore report feeling less of it than they actually do — "especially when asked by the mostly female nursing staff," Park says. In the end, says University of Florida pain researcher Roger B. Fillingim, more research is needed to pinpoint the exact reason for these differences in pain perception.
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