Associations of vitamin C, calcium and protein with bone mass in postmenopausal Mexican American women |
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Authors: | M -C Wang RD DrPH M Luz Villa R Marcus J L Kelsey |
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Institution: | (1) Division of Epidemiology, Department of Health Research and Policy, Stanford University School of Medicine, 94305-5092 Stanford, CA, USA;(2) Department of Medicine, Stanford University School of Medicine, Stanford, California;(3) Department of the Muskuloskeletal Research Laboratory, Geriatric Research, Education, and Clinical Center, Veteran Affairs Medical Center, Palo Alto, California, USA |
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Abstract: | We investigated the associations of vitamin C, calcium and protein intakes with bone mass at the femoral neck and lumbar spine
in postmenopausal Mexican American women. Bone mass was measured by dual-energy X-ray absorptiometry (DXA) and expressed as
areal (BMD, g/cm2) and volumetric (bone mineral apparent density or BMAD, g/cm3) bone mineral density. Diet was assessed using a modified version of the National Cancer Institute Food Questionnaire, which
was administered by trained bilingual interviewers familiar with Mexican dietary practices. Data gathered from 125 subjects
were analyzed using multiple linear regression analysis with age, body mass index (BMI), acculturation, years of estrogen
use, physical activity, total energy intake, and the nutrient of interest as independent variables. Neither calcium nor calcium/protein
ratio was associated with bone mineral density. There was evidence of a positive association between dietary vitamin C intake
and femoral neck BMD (β=0.0002 g/cm2 per mg/day, SE=0.0001,p=0.07) and BMAD (β=0.0001 g/cm3 per mg/day, SE=0.00006,p<0.05), but vitamin C was not associated with lumbar spine bone mass. Further investigation of the role of vitamin C in skeletal
health is warranted. |
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Keywords: | Acculturation Bone mass Diet Mexican American Postmenopausal women Vitamin C |
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