Matheson Eric M, Mainous Arch G, Carnemolla Mark A
Department of Family Medicine, Medical University of South Carolina, Charleston, SC 29425, USA.
Menopause. 2009 Jul-Aug;16(4):756-9. doi: 10.1097/gme.0b013e31819581a5.
The aim of this study was to determine whether frequent onion consumption is associated with increased bone density in perimenopausal and postmenopausal non-Hispanic white women 50 years and older.
An analysis of the National Health and Nutrition Examination Survey 2003-2004 was performed. Perimenopausal and postmenopausal non-Hispanic white female participants (unweighted N = 507; weighted N = 35.7 million) were divided into those who consumed onions less than once a month, twice a month to twice a week, three to six times a week, and once a day or more based on self-reported dietary history. All study participants underwent total body dual-energy x-ray absorptiometry.
After controlling for age, body mass index, daily calcium intake, serum vitamin D, serum parathyroid hormone, estrogen use, smoking status, and exercise status, bone density increased as the frequency of onion consumption increased. Individuals who consumed onions once a day or more had an overall bone density that was 5% greater than individuals who consumed onions once a month or less (P < 0.03).
Onion consumption seems to have a beneficial effect on bone density in perimenopausal and postmenopausal non-Hispanic white women 50 years and older. Furthermore, older women who consume onions most frequently may decrease their risk of hip fracture by more than 20% versus those who never consume onions.
本研究旨在确定50岁及以上的围绝经期和绝经后非西班牙裔白人女性经常食用洋葱是否与骨密度增加有关。
对2003 - 2004年美国国家健康与营养检查调查进行了分析。根据自我报告的饮食史，将围绝经期和绝经后非西班牙裔白人女性参与者（未加权N = 507；加权N = 3570万）分为每月食用洋葱少于一次、每月两次至每周两次、每周三至六次以及每天食用一次或更多次的几组。所有研究参与者均接受了全身双能X线吸收测定。
在控制了年龄、体重指数、每日钙摄入量、血清维生素D、血清甲状旁腺激素、雌激素使用情况、吸烟状况和运动状况后，骨密度随着洋葱食用频率的增加而增加。每天食用一次或更多次洋葱的个体的总体骨密度比每月食用洋葱一次或更少的个体高5%（P < 0.03）。
食用洋葱似乎对50岁及以上的围绝经期和绝经后非西班牙裔白人女性的骨密度有有益影响。此外，与从不食用洋葱的老年女性相比，食用洋葱最频繁的老年女性髋部骨折风险可能降低超过20%。
