As of June 2015, websites for Reuters, the CDC and the Merck Manual contain information on obesity in elderly women. Reuters discusses a 2013 long-term study that examined how mobility decreases as obese female seniors age. The research looked at both waist size and body mass index.
Although both CDC.gov and Merck.com discuss obesity in both male and female senior citizens, a significant amount of information describes what happens to elderly women. For instance, CDC.gov describes how race relates to obesity in older women but not men. For women ages 75 and above, almost half of non-Hispanic blacks are obese. About 30 percent of comparable Hispanic women are obese, while over 27 percent of non-Hispanic white women fall into that category.