RA Incidence Rise in Women
Andie_WebMD_Staff posted:
Researchers Say Increased Use of Some Birth Control Pills Could Be a Factor

A study says the incidence of rheumatoid arthritis in women has risen by 2.5% from 1995 to 2007. Researchers believe that environmental factors like cigarette smoking, vitamin D deficiency, and lower dose synthetic estrogens in oral contraceptives may be the reasons for the increase. However, incidence in men is declining.

Why It Matters:

One to two million Americans suffer from RA. The increase of RA incidence follows a period of decline in the four decades prior to.

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