BACKGROUND: Osteoporosis and osteopenia are characterized by reduced bone mineral density (BMD) and increased fracture risk. Although the risk of fractures is higher in underweight people than in overweight people, the accumulation of body fat (especially abdominal fat) can increase the risk of bone loss. This study aimed to evaluate the association between body fat percentage and BMD in normal-weight middle-aged Koreans. METHODS: This study included 1,992 adults (mean age, 48.7 years; 52.9% women). BMD and body fat were measured using dual-energy X-ray absorptiometry. Multiple linear regression analyses and analysis of covariance were used to assess the association between BMD and body fat. Body fat percentage was grouped by cut-off values. The cut-off values were 20.6% and 25.7% for men with a body mass index of 18.5–22.9 kg/m2, while the cut-off values were 33.4% and 36% for women. RESULTS: Body fat percentage tended to be negatively associated with BMD. Increased body fat percentage was associated with reduced BMD in normal-weight middle-aged adults. The effects of body fat percentage on BMD in normal-weight individuals were more pronounced in men than in women. CONCLUSION: There was a negative correlation between BMD and body fat percentage in middle-aged Korean men and women with normal body weight. This association was stronger in men than in women.
Abdominal Fat ; Absorptiometry, Photon ; Adipose Tissue ; Adult ; Body Mass Index ; Bone Density ; Bone Diseases, Metabolic ; Female ; Humans ; Ideal Body Weight ; Linear Models ; Male ; Osteoporosis ; Overweight ; Thinness

PURPOSE: The present study is focused on understanding weight perception related with individual- and school-level multifactorial origins, underestimated and overestimated respectively, in normal body weight adolescents. METHODS: Using the 2017 Korea Youth Risk Behavior Web-based Survey data of 45,902 students from 799 secondary schools, a multilevel multinomial logistic regression analysis was performed where adolescents (level1) were nested within schools (level 2). RESULTS: At the school level, the average school body mass index (BMI, kg/m²) and physical education were associated with weight perception among both boys and girls. In boys, geographic areas were associated with weight underestimation. At the individual level, perceived economic status, weekly allowance, BMI (kg/m²), smartphone usage time (hrs/day) and perceived stress were associated with weight perception among both boys and girls. Age, paternal education, academic achievement and alcohol use were associated with weight perception among girls, while part-time job and physical activity were associated with weight perception among boys. CONCLUSION: Our findings underscore the importance of individual- and school-level environments in developing correct weight perception and have implications for school health education to establish healthy lifestyle behaviors for all adolescents.
Adolescent ; Body Mass Index ; Education ; Female ; Humans ; Ideal Body Weight ; Korea ; Life Style ; Logistic Models ; Motor Activity ; Multilevel Analysis ; Paternal Age ; Physical Education and Training ; Risk-Taking ; School Health Services ; Smartphone ; Weight Perception

OBJECTIVES: This study was performed to investigate the effect of active nutrition care on feeding and nutritional status of elderly patients receiving long-term enteral tube feeding. METHODS: Subjects included 77 elderly patients who had received enteral nutrition more than one week before admission. Nutrition care was provided to patients supplied less calories than required. Feeding intolerance was examined and managed every day and formula was adjusted to meet nutritional requirement during the first 3 months after admission. Patients were classified into under or over 80% of percent ideal body weight (PIBW) and medical records were used to compare changes in weight,, biochemical indices, and nutritional status during the study. RESULTS: Weight, BMI, triglyceride and total cholesterol in blood, hemoglobin, and hematocrit levels were significantly lower in patients under 80% of the PIBW than in those over 80% of the PIBW at admission. The percentage of supply to required calories was also lower in patients under 80% of the PIBW. After 1 month of nutritional care, supplied volume of formula was significantly increased in patients under 80% of the PIBW. Weight, BMI, and PIBW were increased and there were no differences between groups after 6 months. In addition, the concentrations of triglyceride and total cholesterol in blood, hemoglobin, and hematocrit tended to increase in patients under 80% of the PIBW, leading to no difference between groups after 3 months. CONCLUSIONS: Personalized active nutrition care is effective to increase weight and improve feeding and nutritional status in underweight elderly patients receiving longterm enteral nutrition.
Aged ; Cholesterol ; Enteral Nutrition ; Hematocrit ; Humans ; Ideal Body Weight ; Malnutrition ; Medical Records ; Nutritional Requirements ; Nutritional Status ; Thinness ; Triglycerides

PURPOSE: This study examined the effects of parenteral nutrition (PN) on the nutritional status, clinical improvement, and PN-related complications in pediatric patients who had undergone hematopoietic stem cell transplantation (HSCT). METHODS: A retrospective audit of 110 pediatric patients (age≤18), who underwent HSCT from March 2015 to February 2017 was undertaken. The patients were divided into 3 groups based on the ratio of daily calorie supplementation to the daily calorie requirement (ROCS). The clinical factors related to the nutritional status, such as difference in body weight (BW), body mass index (BMI), percent ideal body weight (PIBW), total protein (T.protein), and albumin; the early clinical outcome, such as PN-duration, length of hospitaliaztion (LOH), engraftment day (ED), graft-versus-host disease, sepsis, pneumonia and mucositis; and PN-related complications, including elevation of total bilirubin (T.bil), direct bilirubin (D.bil), aspartate aminotransferase, alanine aminotransferase, glucose and cholesterol levels, and hepatic veno-occlusive disease were analyzed using the electronic medical records. Additional analysis subject to auto-HSCT and allo-HSCT patients was also performed. RESULTS: The very-low-ROCS, low-ROCS, and satisfied-ROCS group were 30 (27.3%), 47 (42.7%), and 33 (30.0%) patients, respectively. The PN-duration (P=0.005, z=−2.271), LOH (P=0.023, z=−2.840), ED (P < 0.001, z=−3.695), T.bil elevation (P < 0.001, z=−3.660), and D.bil elevation (P=0.002, z=−3.064) tended to decrease with increasing ROCS. The difference in the PN-duration (P=0.017), ED (P=0.001), T.bil elevation (P=0.001), and D.bil elevation (P=0.011) in the 3 groups was statistically significant. In the auto-HSCT patients, the change in BW (P=0.031, z=+2.154), PIBW (P=0.029, z=+2.187), and BMI (P=0.021, z=+2.306) tended to increase. In the allo-HSCT patients, the change in T.protein (P=0.022, z=+2.286) increased but the ED (P=0.021, z=−2.304) decreased. CONCLUSION: Aggressive PN supplementation has an effect on maintaining the nutritional status and achieving better early outcomes in pediatric HSCT patients, whereas it has no effect on increasing the PN-related complications.
Alanine Transaminase ; Aspartate Aminotransferases ; Bilirubin ; Body Mass Index ; Body Weight ; Cholesterol ; Electronic Health Records ; Glucose ; Graft vs Host Disease ; Hematopoietic Stem Cell Transplantation* ; Hematopoietic Stem Cells* ; Hepatic Veno-Occlusive Disease ; Humans ; Ideal Body Weight ; Mucositis ; Nutritional Status ; Parenteral Nutrition* ; Pediatrics ; Pneumonia ; Retrospective Studies ; Sepsis

OBJECTIVES: This study was performed to investigate the effect of active nutrition care on feeding and nutritional status of elderly patients receiving long-term enteral tube feeding. METHODS: Subjects included 77 elderly patients who had received enteral nutrition more than one week before admission. Nutrition care was provided to patients supplied less calories than required. Feeding intolerance was examined and managed every day and formula was adjusted to meet nutritional requirement during the first 3 months after admission. Patients were classified into under or over 80% of percent ideal body weight (PIBW) and medical records were used to compare changes in weight,, biochemical indices, and nutritional status during the study. RESULTS: Weight, BMI, triglyceride and total cholesterol in blood, hemoglobin, and hematocrit levels were significantly lower in patients under 80% of the PIBW than in those over 80% of the PIBW at admission. The percentage of supply to required calories was also lower in patients under 80% of the PIBW. After 1 month of nutritional care, supplied volume of formula was significantly increased in patients under 80% of the PIBW. Weight, BMI, and PIBW were increased and there were no differences between groups after 6 months. In addition, the concentrations of triglyceride and total cholesterol in blood, hemoglobin, and hematocrit tended to increase in patients under 80% of the PIBW, leading to no difference between groups after 3 months. CONCLUSIONS: Personalized active nutrition care is effective to increase weight and improve feeding and nutritional status in underweight elderly patients receiving longterm enteral nutrition.
Aged ; Cholesterol ; Enteral Nutrition ; Hematocrit ; Humans ; Ideal Body Weight ; Malnutrition ; Medical Records ; Nutritional Requirements ; Nutritional Status ; Thinness ; Triglycerides

PURPOSE: This study aims to investigate gender differences in the association between depressive symptoms and weight, weight perception, and body satisfaction among Korean adolescents. METHODS: A secondary data analysis was performed on data from 33,374 adolescents who participated in the 2015 Adolescent Health Behavior Online Survey. They were classified as underweight, normal weight, or overweight/obese; weight perception was classified into perception of being underweight, normal weight, or overweight/obese; and weight satisfaction into desire to gain weight, satisfied, and desire to lose weight. RESULTS: Among boys, perception of being underweight (adjusted odds ratio [AOR]: 1.20, 95% confidence interval [CI]: 1.07~1.35) and desire to gain weight (AOR: 1.45, 95% CI: 1.30~1.62) were associated with depression. Among girls, perception of being overweight or obese (AOR: 1.18, 95% CI: 1.07~1.29) and a desire to lose weight (AOR: 1.30, 95% CI: 1.18~1.42) were associated with depression. CONCLUSION: Gender differences were observed in the association between weight perception and depression in adolescents. The perception of being underweight among boys and the perception of being overweight/overweight among girls were associated with depression. Thus, gender-specific intervention programs to correct weight perception and weight satisfaction are needed in order to relieve depressive symptoms in adolescents.
Adolescent Health ; Adolescent* ; Body Weight ; Depression* ; Female ; Humans ; Ideal Body Weight ; Odds Ratio ; Overweight ; Statistics as Topic ; Thinness ; Weight Perception*

BACKGROUND: Many clinicians have probably used subjective, unscientific methods for dose reduction to avoid overdose in elderly patients. The aim of this study was to compare several dosing schedules of intravenous dexmedetomidine (DEX) to identify the appropriate dosing schedule within the therapeutic dose range for adequate sedation of elderly patients under spinal anesthesia. METHODS: After administration of spinal anesthesia, a loading dose of DEX was injected over 10 min in three groups with the following dosages: group A, 1.0 μg/kg of actual body weight; group B, 1.0 μg/kg of ideal body weight (IBW); and group C, 0.8 μg/kg of IBW. Then, a maintenance infusion (0.5 μg/kg of each BW/h) was administered. The bispectral index score (BIS), the time required to reach BIS 80, airway obstruction score, and the occurrence of bradycardia were recorded. RESULTS: The changes in the BIS among the groups over time were found to have statistically significant differences (P < 0.001). The times required to reach BIS 80 were 6.1 ± 5.3 min, 5.0 ± 3.6 min, and 11.0 ± 8.6 min in groups A, B, and C, respectively (P < 0.001). The airway obstruction score and the frequency of bradycardia did not have statistically significant differences among the groups. CONCLUSIONS: An initial loading dose of DEX that is 0.8 μg/kg of IBW over 10 min, followed by an infusion rate of less than 0.5 μg/kg of IBW/h may be adequate for sedation in elderly patients receiving spinal anesthesia.
Aged* ; Airway Obstruction ; Anesthesia, Spinal* ; Appointments and Schedules* ; Body Weight ; Bradycardia ; Dexmedetomidine* ; Humans ; Ideal Body Weight

BACKGROUND: Many clinicians have probably used subjective, unscientific methods for dose reduction to avoid overdose in elderly patients. The aim of this study was to compare several dosing schedules of intravenous dexmedetomidine (DEX) to identify the appropriate dosing schedule within the therapeutic dose range for adequate sedation of elderly patients under spinal anesthesia. METHODS: After administration of spinal anesthesia, a loading dose of DEX was injected over 10 min in three groups with the following dosages: group A, 1.0 μg/kg of actual body weight; group B, 1.0 μg/kg of ideal body weight (IBW); and group C, 0.8 μg/kg of IBW. Then, a maintenance infusion (0.5 μg/kg of each BW/h) was administered. The bispectral index score (BIS), the time required to reach BIS 80, airway obstruction score, and the occurrence of bradycardia were recorded. RESULTS: The changes in the BIS among the groups over time were found to have statistically significant differences (P < 0.001). The times required to reach BIS 80 were 6.1 ± 5.3 min, 5.0 ± 3.6 min, and 11.0 ± 8.6 min in groups A, B, and C, respectively (P < 0.001). The airway obstruction score and the frequency of bradycardia did not have statistically significant differences among the groups. CONCLUSIONS: An initial loading dose of DEX that is 0.8 μg/kg of IBW over 10 min, followed by an infusion rate of less than 0.5 μg/kg of IBW/h may be adequate for sedation in elderly patients receiving spinal anesthesia.
Aged* ; Airway Obstruction ; Anesthesia, Spinal* ; Appointments and Schedules* ; Body Weight ; Bradycardia ; Dexmedetomidine* ; Humans ; Ideal Body Weight

BACKGROUND: For many drugs, dosing scalars such as ideal body weight (IBW) and lean body mass are recommended over the use of total body weight (TBW) during weight-based dose calculations. Doses based on TBW are frequently used, and this may cause under- or over-dosing. Because dexmedetomidine (DEX) overdosing could increase the incidence of side effects, and spinal anesthesia may increase sensitivity to a sedative agent, determining an appropriate dose is critical. METHODS: Eighty patients were randomly divided into 2 groups, the IBW and TBW groups. Patients received a loading dose of DEX 1 µg/kg IBW or TBW for 10 min, followed by a continuous infusion at 0.5 µg/kg/h IBW or TBW after the induction of spinal anesthesia. The patients' vital signs, bispectral index (BIS), peripheral capillary oxygen saturation, time to reach a BIS of 80, airway obstruction score, and coughing were monitored and recorded at 0, 10, 30, and 50 min after the start of the loading dose injection. RESULTS: The changes in BIS, airway obstruction score, the incidence of side effects, and time to reach a BIS of 80 did not show statistically significant differences between the two groups. However, airway obstruction and/or coughing occurred in both groups, and the average BIS in both groups was lower than the target BIS of 60-80 at 30 and 50 min. CONCLUSIONS: A loading dose of DEX 1 µg/kg for 10 min, and a maintenance dose of DEX 0.5 µg/kg/h of either IBW or TBW, may induce excessive sedation, airway obstruction, and/or coughing under spinal anesthesia.
Airway Obstruction* ; Anesthesia, Spinal* ; Body Weight ; Capillaries ; Consciousness Monitors ; Cough ; Dexmedetomidine* ; Humans ; Ideal Body Weight ; Incidence ; Oxygen ; Vital Signs

In healthy individuals, energy intake is in balance with energy expenditure, which helps to maintain a normal body weight. The brain's inability to control energy homeostasis underlies the pathology of hyperphagia and obesity. The brain detects body energy excess and deficit by sensing the levels of circulating metabolic hormones and nutrients and by receiving metabolic information from the periphery via the autonomic nervous system. A specialized neuronal network coordinates energy intake behavior and the metabolic processes affecting energy expenditure. Here, we briefly review neuronal mechanisms by which our body maintains energy balance.
Autonomic Nervous System ; Brain Stem ; Brain* ; Energy Intake ; Energy Metabolism* ; Homeostasis ; Hyperphagia ; Hypothalamus ; Ideal Body Weight ; Metabolism ; Neurons ; Obesity ; Pathology