• The Korean Journal of Food And Nutrition
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• v.24 no.4
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• pp.630-638
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• 2011

This study was performed to assess the relationships among bone mineral density, anthropometric measurements, maternal factors and exercise in premenopausal and postmenopausal women. Anthropometric measurements were taken by a trained practitioner and the maternal factors of the 78 subjects in Gyeonggi-do were acquired by an interview questionnare. The BMD of the lumbar spine(L2~L4), femoral neck, Ward's triangles and trochanters were measured by dual energy X-ray absorptiometry. The mean age of the premenopausal women was 45.23 years and that of the postmenopausal women whose ase of menopause was 49.37 years was 61.27 years. The age, waist and waist to hip ratio of postmenopausal women were significantly higher than those of premenopausal women. BMD of the lumbar spine(L2~L4) in postmenopausal women was significantly higher than that of premenopausal women. Number of children and age at last delivery were significantly higher in postmenopausal women than those in premenopausal women. The BMDs of the lumbar spine and femoral neck of premenopausal women was positively correlated with weight, body mass index, waist and WHR and the BMDs of these two sites in postmenopausal women were positively correlated with height, and weight. In postmenopausal women, BMD of the lumbar spine was negatively correlated with duration time after menopause and BMD of the femoral neck was positively correlated with age at last delivery. These results suggest that it is necessary to maintain adequate body weight. Health management and education about performing more exercise are recommended for postmenopausal women to prevent osteoporosis.

• Journal of Korean Academy of Nursing
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• v.33 no.3
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• pp.312-320
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• 2003

Purpose: To investigate body compositons and bone mineral density(BMD) in college women and to find the relationship between them. Method: From January to March of 2001, BMD at four parts(forearm, lumbar, femur and whole body), body mass index(BMI), body fat mass(BFM), lean body mass(LBM) and body fat percentage(%Fat) were measured with the Dual Energy X-ray Absorptiometry. Other physical characteristics were measured with a scale, a height measurer, and questionnaires. Result: Grouping by the BMI, 43.2% showed low weight, and 5% over weight. When applying the percent Fat, 43.8 % was diagnosed as obesity group. The fact indicate that a majority of college women have unbalanced body composition with high percent Fat, compared to their body weight. Assessing the BMD with the WHO standards, 91.4～95.7% of the BMD of forearm and whole body was normal. But, 40.3% and 33.1～43.9% showed osteopenia at lumbar and femur, and 104 %, 0.7～7.2% showed osteoporosis. The BMD at all parts showed significant correlation each other(r=.29～.89, p=.001～.000). Body weight and BMI showed correlations to with BMDs at all parts of the body(r=.19～46, p=.025～.000; r=18～.45, p=.039～.000). But the percent Fat had a correlation with only femur neck BMD(r=.19, p=.024). Conclusion: This study showed a majority of healthy college women were exposed to the risk for osteoporosis. Additional study is required to develop nursing interventions to remove the risk factors of osteoporosis. In particular, the acquisition of balanced body composition is necessary, increasing body weight and BMI through the increase of LBM, not through the quantitative increase of BFM.

• Journal of Nutrition and Health
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• v.38 no.3
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• pp.242-250
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• 2005

This study was conducted to assess the bone mineral density (BMD) and the anthropometric measurements, life style, and other environmental factors affecting BMD in Korean adolescents. Subjects were 167 high school students (83 male students, 84 female students) in Seoul. BMD was measured in the lumbar spine (LS), femoral neck (FN), femoral trochanter (FT), and Ward's triangle (WT) by dual energy x-ray absorptiometry (DEXA). The questionnaire was used to assess the anthropometric measurements, life style, and other environmental factors. Bone mineral density of LS, FN, FT and WT were 0.967, 0.960, 0.795, $0.761 g/{\cal}cm^2$. The BMD of LS was not different by sex but the male students's BMD of FN, FT and WT were higher significantly than the female students (LS: 0.976 vs. 0.958, FN: 1.040 vs. 0.880, FT: 0.842 vs. 0.749, WT: 0.827 vs. $0.695 g/{\cal}cm^2$) Female students's BMD of LS, FN, WT, and FT was positively correlated with weight but male students's BMD of WT was not correlated with weight. The factors such as the life style, activity and exercise have significant influence on BMD. This study confirms that the major factor affecting BMD was body weight and the factors such as the life style, activity and exercise is related to accumulation of BMD. The classification of sexual characteristics is needed for further studies on BMD of adolescents.

• Journal of Preventive Medicine and Public Health
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• v.37 no.1
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• pp.72-79
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• 2004

Objectives : This cross-sectional study aimed to quantify the relationship between the bone mineral density at the os calcis and the body mass composition in healthy children. Methods : The areal bone mineral density was measured at the os calcis with peripheral dual energy X-ray absorptiometry. The fat free mass, fat mass and percentage fat mass were measured using bioelectric impedance, in 237 Korean children, aged 9 to 12 years. The sexual maturity was determined by self assessment, using standardized series of the 5 Tanner stage drawings, accompanied by explanatory text. Results : From multiple linear regression models, adjusted for age, sexual maturity and height, the fat free mass was found to be the best predictor of the calcaneal bone mineral density in both sexes. About 15 and 20% variabilities were found in the calcaneal bone mineral densities of the boys and girls, respectively, which can be explained by the fat free mass. After weight adjustment, the percentage fat mass was negatively associated with the calcaneal bone mineral density in both sexes. Conclusions : The findings of this study suggest that the fat free mass, among the body compositions, is the major determinant of bone mineral density at the os calcis in Korean children aged 9 to 12 years. Obesity, defined as the percentage fat mass, is assumed to have a negative effect on the calcaneal bone density in children of the same weight.

• Korean Journal of Applied Biomechanics
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• v.21 no.3
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• pp.297-308
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• 2011

The purpose of this study was to investigate the relationship among isometric and isokinetic muscle strength, lean body mass(LBM) and bone mineral density(BMD) in the elderly. Eleven males(age, 70.27${\pm}$5.78yr; height, 167.36${\pm}$6.68 cm; weight, 68.34${\pm}$8.23 kg) and thirteen female(age, 69.77${\pm}$4.13yr; height, 152.80${\pm}$4.45 cm; weight, 56.86${\pm}$7.40 kg) participated in this study. In all subjects, LBM and BMD segments was measured by using Dual-energy x-ray absorptiometry(DEXA, Lunar DPS-DM, U.S.A.). Maximum isometric and isokinetic muscle strength of flexion and extension at the knee and elbow, ankle, trunk joints were measured by using an isokinetic dynamometer(CON-TREX(R) Multi Joint Testing Module, Switzerland). The results of this study showed that isometric and isokinetic muscle strength was significantly higher in extension than flexion. In the male and female, hamstring to quadriceps strength ratio(H:Q ratio) was increased as contraction velocity increased. BMD was correlated significantly with trunk extension in the male, but not in the female. LBM was correlated significantly in the male and female with knee extension strength. This study suggests that in the elderly muscle strength training program should put more weight on extensor muscles of the body.

• Nutrition Research and Practice
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• v.4 no.2
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• pp.128-135
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• 2010

Obesity was characterized in Korean elementary students using different obesity assessment tests on 103 overweight elementary students from three schools of Jeonbuk Province. The body mass index (BMI) and obesity index (OI) were compared, and the data using DEXA and CT were compared with the data using BIA and a tape measure. The results of this study are as follows: first, 27 students who were classified as obese by OI were classified as overweight by BMI, and 3 students who were classified as standard weight by BMI were classified as overweight by OI. Secondly, by DEXA and BIA measurements, there was 1.51% difference in body fat percentage (boys 1.66%, girls 1.17%) and the difference in body fat mass between boys and girls was 0.77 kg (boys 0.85 kg, girls 0.59 kg), but those differences in body fat percentage and mass were not statistically significant. Thirdly, the average total abdominal fat (TAF) measured by CT scans of obese children was more significantly related with subcutaneous fat (r = 0.983, P < 0.01) than visceral fat (r = 0.640, P < 0.01). Also, TAF were highest significant with waist circumference by a tape measure (r = 0.744, P < 0.01). In summary, as there are some differences of assessment results between two obesity test methods (BMI, OI), we need more definite standards to determine the degree of obesity. The BIA seems to be the most simple and effective way to measure body fat mass, whereas waist/hip ratio (WHR) using a tape measurer is considered to be the most effective method for assessing abdominal fat in elementary students.

• The Journal of Korean Obstetrics and Gynecology
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• v.23 no.4
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• pp.109-116
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• 2010

Purpose: The purpose of this study was to examine Bone Marrow Density (BMD) of women suffering from general pain after childbirth. Methods: We studied 18 patients visiting $\bigcirc\bigcirc$hospital from March 2007 to May 2010. The subjects were categorized in two groups, symptom group(n=12) and no symptom group(n=6). We measured BMD using Dual Energy X-ray Absorptiometry (DEXA) and studied the difference of BMD between two groups by Student T-test using SPSS for windows(version 13.0). Results: The general characteristics such as age, days of postpartum, primiparity, cesarean section, breast-feeding of two groups were not different statistically. BMD, T-score and Z-score of symptom group were statistically lower than no symptom group. Conclusion: The results suggest that women suffering from general pain after childbirth shows low BMD, T-score and Z-score. It seems to be due to the kidney deficiency after childbirth.

• Journal of Korean Public Health Nursing
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• v.28 no.1
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• pp.102-113
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• 2014

Purpose: The purpose of this study was to evaluate the effects of long term osteoporosis management education consist of exercise, drug therapy, and nutrition on bone mineral density (BMD) and medication compliance among postmenopausal women who have just been diagnosed with osteoporosis. Methods: The research design consisted of a pre-and post-test quasi-experimental design through a nonequivalent control group. The participants in this study were 60 individuals with osteoporosis, and who were classified according to two groups; the control group (n=30) who were given general clinical guidelines, and the experimental group (n=30) who received management education once for 60 minutes every three months using a standardized educational sheet. After one year, BMD was assessed using band dual energy X-ray absorptiometry (DXA) and medication possession ratio (MPR) for medication compliance. Analysis of collected data was performed using descriptive statistics t-test, chi-test, and paired t-test. Results: No significant difference in BMD (t=-1.02, p=.311) and MPR (t=-0.77, p=.440) was observed between the two groups. However, a significant increase in femur neck BMD was observed in the experimental group compared with the control group (t=-2.18, p=.033). Conclusion: Conduct of further study will be needed for examination of the effect of long-term osteoporosis management education on BMD Level and Medication Compliance in Postmenopausal Women.

• Journal of Preventive Medicine and Public Health
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• v.39 no.5
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• pp.389-396
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• 2006

Objectives: A community-based, cross-sectional survey was conducted to determine theprevalence of osteoporosis and to evaluate the effects of body composition, health behaviors and reproductive history on bone density in postmenopausal women. Methods: The study subjects were 362 postmenopausal women, aged 45 years old or over, who were invited to the hospital. Information on their socio-demographic characteristics and the potential risk factors such as their past medical history, smoking, alcohol intake, exercise, diet and menstrual/reproductive histories were collected by trained interviewers. Weight, height, the body mass index ($kg/m^{2}$), and body composition variables were measured. Bone mineral density of the lumbar spine was measured by dual energy X-ray absorptiometry (DXA). Results: The prevalence of osteoporosis was 30.6% in the $45{\sim}64$ years old women, 52.5% in the elderly women aged $65{\sim}74$, and 68.7% in the women aged 75 years or over. After adjustment for the effect of potential covariates, those women in the highest 25% (4th quartile) of the lean body mass are less likely to have osteoporosis (aOR=0.31, 95% CI=0.12-0.76), compared with the lowest quartile group. More parity also had significantly detrimental effects on osteoporosis. Conclusions: These findings suggest that the prevalence of osteoporosis in postmenopausal women increased with age from 46.3% of those aged 45-64 to 68.7% for those aged 75 and over. Lean body mass and parity appeared significant contributor to bone mineral density in postmenopausal women in this population.

• Journal of Nutrition and Health
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• v.37 no.1
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• pp.52-60
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• 2004

This study was conducted to investigate the bone mineral density (BMD) and the anthropometric measurements, socioeconomic factors, family history of osteoporosis and other environmental factors affecting BMD in children. One hundred sixty children (80 males, 80 females) in second grade of elementary school in Seoul were recruited; the mean age was 7.7 $\pm$ 0.47 years. Bone mineral density was measured in the lumbar spine (LS), femoral neck (FN), femoral trochanter (FT), and Ward's triangle (WT) by Dual Energy X-ray Absorptiometry (DEXA). Socioeconomic factors, family history of osteoporosis, and other environmental factors were assessed by questionnaire. Bone mineral densities of LS, FN, FT, and WT were 0.677, 0.637, 0.618, and 0.658 g/$\textrm{cm}^2$. BMD of boys was higher than that of girls (LS: 0.685 vs. 0.669, FN: 0.660 vs. 0.614, FT: 0.632 vs. 0.604, WT: 0.678 vs. 0.639 g/$\textrm{cm}^2$). Anthrometric measurements (height, weight relative body weight, circumference of waist and hip) were positively correlated with BMD. With increasing family income, BMD of LS was significantly lowered, and negative correlation was observed between mother's age at birth of subject and the BMD of FN. And the BMD of children with a family history of osteoporosis was significantly lower. However BMDs were not different by educational level of parents, family pattern, delivery term, birth weight, and type of feeding. Further studies are needed to clarify the factors affecting BMD of children and earlier age, included infants and even prenatal life. If any association is revealed and persist until the attainment of peak bone mass, osteoporosis prevention programs are needed to be start very early in the life cycle.