Impact of increased overweight on the projected prevalence of osteoporosis in older women
- First Online:
- 166 Downloads
Overweight is increasing worldwide, but particularly in the United States of America. Higher body weight is associated with higher bone density, so our goal was to estimate whether the higher prevalence of overweight is likely to reduce osteoporosis among older women.
We calculated the prevalence of osteoporosis by weight status in older women using data from the third National Health and Nutrition Examination Survey (NHANES III, 1988–94). We defined overweight as a body mass index (BMI) ≥25 and osteoporosis as a femur neck bone mineral density (BMD) value 2.5 standard deviations or more below the mean of that of young women. To estimate the expected prevalence of osteoporosis, we applied the prevalence of osteoporosis by weight status from NHANES III to the corresponding weight status prevalence from NHANES 1999–2002.
Of older women in NHANES 1999–2002, 68% were overweight compared to 62% in NHANES III. Overweight status was significantly related to osteoporosis prevalence (P < 0.001). However, the expected prevalence of osteoporosis in NHANES 1999–2002 was only slightly lower than that seen in NHANES III (16.8% vs 18.1%, respectively).
The increasing prevalence of overweight among older US women appears unlikely to be accompanied by a significant reduction in osteoporosis.
KeywordsImpact of overweight Osteoporosis
- 1.National Osteoporosis Foundation (2002) America’s bone health: the state of osteoporosis and low bone mass in our nation. National Osteoporosis Foundation, Washington, DCGoogle Scholar
- 10.Plan and Operation of the Third National Health and Nutrition Examination Survey (1994) 1988–94: series 1: programs and collection procedures. Vital Health Stat 1 32:1–407Google Scholar
- 11.National Center for Health Statistics NCHS definitions: Race. Available at http://www.cdc.gov/nchs/datawh/nchsdefs/race.htm. Accessed 2 September 2005
- 13.World Health Organization (1994) Assessment of fracture risk and its application to screening for postmenopausal osteoporosis. Technical Report Series No. 843. WHO, Geneva SwitzerlandGoogle Scholar
- 14.Shah BV, Barnwell BG, Hunt PN, et al (1991) SUDAAN User’s Manual, Release 5.50. Research Triangle Institute, Research Triangle Park, NCGoogle Scholar
- 19.Albala C, Yanez M, Devoto E, et al (1996) Obesity as a protective factor for postmenopausal osteoporosis. Int J Obes 20:1027–1032Google Scholar
- 27.National Center for Health Statistics. Health, United States (2004) With chartbook on trends in the health of Americans. Hyattsville MD: National Center for Health Statistics; 2004. Available at:http://www.cdc.gov/nchs/data/hus/hus04.pdf. Accessed 22 June 2005