노년기 농촌여성의 비타민 D 수용체 유전자형에 따른 칼슘 섭취량과 골밀도와의 관계

• Published in: Korean journal of community nutrition Vol. 11; no. 4; pp. 534 - 540
• Main Authors: 김지선(Ji Sun Kim), 김희선(Hee Seon Kim)
• Format: Journal Article
• Language: Korean
• Published: 대한지역사회영양학회 2006
• Subjects: bone mineral density; broadband ultrasound attenuation; postmenopausal women; calcium intake; vitamin D receptor gene polymorphism
• ISSN: 1226-0983; 2287-1624; 2951-3146

Recent studies have shown that environmental, biochemical, nutritional or genetic factors affect bone mineral density (BMD). The purpose of the present study was to investigate the effect of vitamin D receptor (VDR) gentotype and nutritional status on BMD of elderly women living in a rural area. Three hundred thirty five elderly women over 65 years in Asan participated the study. Data for demographic and nutrient intakes were obtained by survey with a two day 24 hr recall method. BMD was measured by broadband ultrasound attenuation (BUA) using quantitative ultrasound (QUS). VDR genotypes of the subjects analyzed with Bsm I restriction enzyme were bb (92%), Bb (7%) and BB (1%). No differences were found between genotypes bb and Bb/BB in age, menopausal age, body mass index and body fat. BUA of bb genotype was higher (62.5 $\pm$ 15.6 dB/MHz) than Bb/BB genotype (56.1 $\pm$ 17.6 dB/MHz) by Student's t-tests. Correlation analyses showed strong negative correlation of BMD and age, but positive correlation with BMI, energy and calcium intake. When subgroup analyses were conducted after stratification by the median calcium intake level (412.9 mg/d), the above median calcium intake group showed significant difference in BUA by VDR genotype while the lower median calcium intake group did not show significant difference. The current study confirmed interaction of calcium intake and VDR genotype in association with BMD. Further nutritional intervention will be needed to improve calcium status of the elderly women living in rural areas.