Relationships of internet gaming reasons to biological indicators and risk of internet gaming addiction in Korean adolescent male game users.

BACKGROUND: There are no standard diagnostic criteria or interventions for internet gaming addiction (IGA) even though IGA is one of the most pervasive public health issues among youth worldwide. Internet gaming reasons or motivations have been studied as a potential predictor of IGA, but the results have been inconsistent and biological indicators of gaming reasons have rarely been studied. We sought to (1) identify categories of internet gaming reasons, (2) examine the relationship of gaming reasons to risk of IGA, and (3) describe biological indicators associated with reasons for gaming. METHODS: We used a multi-phase cross-sectional design including individual interviews; focus group discussion; and descriptive, comparative analysis. Fifteen Korean adolescent male internet gamers participated in individual interviews and eight participated in a focus group aimed at identifying reasons for internet gaming. Using the identified gaming reasons from these sources we surveyed 225 adolescent game users using a self-report questionnaire. Participants provided blood samples for assessment of norepinephrine (NE) and serum cortisol. RESULTS: We identified four major categories of internet gaming reasons: entertainment, getting along with friends, stress relief, and habitual gaming. The habitual group showed significantly greater risk of IGA than the other groups (p < .001) and the lowest plasma NE levels (p = .035), possibly indicating an alteration in autonomic function. CONCLUSION: Health care providers are encouraged to screen adolescents for excessive internet gaming and to intervene with those who report habitual gaming behaviors. When feasible, assessment of biological indicators, such as plasma NE, may help to identify youth at greatest risk of IGA.

Association of Weight Control Behaviors with Body Mass Index in Korean Adolescents: A Quantile Regression Approach.

PURPOSE: Adolescents are interested in weight control but likely practice unhealthy weight control behaviors. This study aimed to examine weight control behaviors associated with body mass index (BMI) in Korean adolescents. DESIGN AND METHODS: In this descriptive cross-sectional study of 16- to 19-year-old adolescents (97 girls and 90 boys), analyses were conducted of physical activity, sedentary behaviors, dietary behaviors, and self-efficacy for physical activity and diet. Daily steps were measured using pedometers. Height and weight were self-reported. We conducted descriptive statistics and quantile regression analysis using STATA 14.0. RESULTS: About 10% were underweight, and 8.6% overweight and obese. Average weekday and weekend steps/day were <10,000. Only 4.3% reported performing moderate-to-vigorous physical activity (MVPA) daily. Less than half (42.5%) reported that they had three meals/day every day. Most (89.3%) had milk less than once/day. Quantile regression showed that, for the 5th BMI percentile group, (1) age (ß = 0.941) and milk consumption (ß = 2.148) were significantly positively associated with BMI, whereas (2) dietary self-efficacy (ß = -0.083) was significantly negatively associated with BMI. For the 95th percentile group, having three meals/day (ß = 2.558) was significantly positively associated with BMI, whereas MVPA (ß = -5.440) and muscle-strengthening exercise (ß = -3.392) were significantly negatively associated with BMI. CONCLUSIONS: Milk consumption was positively associated with BMI of underweight adolescents, whereas physical activities were negatively associated with BMI of overweight and obese adolescents. PRACTICE IMPLICATION: Weight control programs for adolescents may need to be tailored for differing BMI levels.

Competency and an active learning program in undergraduate nursing education.

AIMS: To evaluate the effect of an active learning program on competency of senior students. BACKGROUND: Active learning strategies have been used to help students achieve desired nursing competency, but their effectiveness has not been systematically examined. DESIGN: A descriptive, cross-sectional comparative design was used. Two cohort group comparisons using t-test were made: one in an active learning group and the other in a traditional learning group. METHODS: A total of 147 senior nursing students near graduation participated in this study: 73 in 2010 and 74 in 2013. The active learning program incorporated high-fidelity simulation, situation-based case studies, standardized patients, audio-video playback, reflective activities and technology such as a SmartPad-based program. RESULTS: The overall scores of the nursing competency in the active group were significantly higher than those in the traditional group. Of five overall subdomains, the scores of the special and general clinical performance competency, critical thinking and human understanding were significantly higher in the active group than in the traditional group. Importance-performance analysis showed that all five subdomains of the active group clustered in the high importance and high performance quadrant, indicating significantly better achievements. In contrast, the students in the traditional group showed scattered patterns in three quadrants, excluding the low importance and low performance quadrants. This pattern indicates that the traditional learning method did not yield the high performance in most important areas. CONCLUSION: The findings of this study suggest that an active learning strategy is useful for helping undergraduate students to gain competency.

Quality of nursing doctoral education in seven countries: survey of faculty and students/graduates.

AIMS: This study aimed to compare the findings of the quality of nursing doctoral education survey across seven countries and discuss the strategic directions for improving quality. BACKGROUND: No comparative evaluation of global quality of nursing doctoral education has been reported to date despite the rapid increase in the number of nursing doctoral programmes. DESIGN: A descriptive, cross-country, comparative design was employed. METHODS: Data were collected from 2007-2010 from nursing schools in seven countries: Australia, Japan, Korea, South Africa, Thailand, UK and USA. An online questionnaire was used to evaluate quality of nursing doctoral education except for Japan, where a paper version was used. Korea and South Africa used e-mails quality of nursing doctoral education was evaluated using four domains: Programme, Faculty (referring to academic staff), Resource and Evaluation. Descriptive statistics, correlational and ordinal logistic regression were employed. RESULTS: A total of 105 deans/schools, 414 faculty and 1149 students/graduates participated. The perceptions of faculty and students/graduates about the quality of nursing doctoral education across the seven countries were mostly favourable on all four domains. The faculty domain score had the largest estimated coefficient for relative importance. As the overall quality level of doctoral education rose from fair to good, the resource domain showed an increased effect. CONCLUSIONS: Both faculty and students/graduates groups rated the overall quality of nursing doctoral education favourably. The faculty domain had the greatest importance for quality, followed by the programme domain. However, the importance of the resource domain gained significance as the overall quality of nursing doctoral education increased, indicating the needs for more attention to resources if the quality of nursing doctoral education is to improve.

Family Factors and Body Mass Index Among Korean-American Preschoolers.

PURPOSE: The purpose of this study was to examine family factors related to BMI z-scores and overweight/obesity among Korean-American (KA) preschoolers. METHODS: A cross-sectional study was conducted with 104 KA preschoolers and their mothers in the Chicago metropolitan area. KA mothers completed questionnaires and their preschool-age children's weights and heights were measured. Hierarchical multiple linear regression and multiple logistic regression were performed. RESULTS: Twenty-two percent of preschoolers were overweight or obese (BMI ≥85th percentile). Family factors explained 30% of the variance in the children's BMI z-scores, with parenting feeding style and family functioning contributing most. In logistic regression, children were more likely to be overweight/obese if: a family had more children, the mother perceived her child as overweight/obese, and the family had regular child routines. CONCLUSION: Health care providers should consider the family as one unit of care and use that unit to implement culturally appropriate childhood overweight/obesity prevention for Korean-American preschool-aged children. Parental feeding style and parents' attitudes about child weight should be considered when advising Korean-Americans about reducing children's overweight/obesity.

A family involvement and patient-tailored health management program in elderly Korean stroke patients' day care centers.

PURPOSE: This study aimed to examine the effects of a family involvement and functional rehabilitation program in an adult day care center on elderly Korean stroke patients' perceived health, activities of daily living, instrumental activities of daily living, and cost of health services, and on family caregivers' satisfaction. DESIGN: Using one-group pre- and posttest design, dyads consisting of 19 elderly stroke patients and family caregivers participated in 12-week intervention, including involvement of family caregivers in day care services and patient-tailored health management. FINDINGS: Outcomes of patients and caregivers were significantly improved (all p < .001). However, the cost of health services did not decrease significantly. CONCLUSIONS: This program improved functional levels and health perception of elderly stroke patients and caregivers' satisfaction. However, results must be interpreted with caution, because this was only a small, single-group pilot study. CLINICAL RELEVANCE: This program may be effective for elderly stroke patients and their caregivers.

Fucoidan prevents high-fat diet-induced obesity in animals by suppression of fat accumulation.

This study examines the antiobesity effects of fucoidan in an animal model of diet-induced obesity. Mice were fed a standard diet or high-fat diet (HFD) for 5 weeks. After that, the mice were divided into four experimental groups, with 10 mice per group, including a standard diet group, HFD group, HFD containing 1% fucoidan (HFD + FUCO 1%) group and HFD containing 2% fucoidan (HFD + FUCO 2%) group. The fucoidan supplementation group had significantly decreased body-weight gain, food efficiency ratio and relative liver and epididymal fat mass compared with the HFD group. The mice supplemented with fucoidan showed significantly reduced triglyceride, total cholesterol and low-density lipoprotein levels in the plasma. Liver steatosis induced by the HFD improved in the fucoidan-supplemented group. Furthermore, fucoidan affected the down-regulation expression patterns of epididymal adipose tissue genes such as peroxisome proliferator-activated receptor γ, adipose-specific fatty acid binding protein and acetyl CoA carboxylase. Therefore, fucoidan may be considered for use in improving obesity.

Quality of doctoral nursing education in the United Kingdom: exploring the views of doctoral students and staff based on a cross-sectional questionnaire survey.

AIM: To evaluate the quality of doctoral education in nursing in the United Kingdom. BACKGROUND: In recent decades, doctoral education programmes in nursing are increasing worldwide. There are many reasons for this and concerns have been raised regarding the quality of provision in and across countries. To date, the quality of doctoral education on a global level has not been reported in the literature. This United Kingdom study is part of a seven country investigation into the quality of doctoral education in nursing (Australia, Japan, Korea, South Africa, Thailand, United Kingdom and United States of America). DESIGN: A quantitative study using a cross-sectional comparative survey design. METHOD: An online survey was administered to collect the views of doctoral students and staff members on four domains: programme, faculty/staff, resource and evaluation. The study was carried out between 2010-2012. RESULTS: In most cases, staff perceived these more positively than students and the differences in perception were often statistically significant. Interestingly, many students rated the quality of supervision as excellent, whereas no staff member rated supervision this highly. The crucial importance of resources was confirmed in the path analysis of the four Quality of Doctoral Nursing Education domains. This demonstrates that investment in resources is much more cost-effective than investment in the other domains in relation to improving the overall quality of doctoral education in nursing. CONCLUSION: This study has wide-ranging implications for how the quality of doctoral education is monitored and enhanced.

Correction to: Effects of association colloidal structures on the oxygen solubility in oil­in­water emulsion matrix.

[This corrects the article DOI: 10.1007/s10068-023-01338-6.].

Generation of volatiles from heated enzymatic hydrolysates of perilla meal with coconut oil in Maillard reaction system.

Perilla meal hydrolysates (PMHs) were prepared by proteases; volatile profiles from heated mixtures of PMH and coconut oil (CO) were evaluated for their application as odor providers. Amino acids composition and degree of hydrolysis, and antioxidant activity in O/W emulsion of PMHs were assessed. PMHs were heated with different concentration of CO or with CO, xylose, and cysteine, which were non-Maillard and Maillard system, respectively. Among PMHs, double enzyme treatment using Alcalase and Flavourzyme showed higher degree of hydrolysis and antioxidant activity compared to PMHs from one type of enzymes. The presence of CO significantly increased oxygen, sulfur, and nitrogen-containing volatiles from PMHs in non-Maillard system. In case of Maillard system, PMHs with 10 % (w/w) CO contributed the formation of oxygen and nitrogen-containing volatiles such as furan and 2-methylpyrazine. PMHs might serve as an odor generator in the presence of edible oils like CO.

Effects of association colloidal structures on the oxygen solubility in oil-in-water emulsion matrix.

Although association colloidal structures are believed as major oxidation places, relationship of oxygen molecules with association colloids have not been evaluated in oil-in-water (O/W) emulsion. Oxygen solubility was determined in O/W emulsion containing dispersed phases with different charges of emulsifiers, numbers of dispersed droplets, and surface areas of dispersed droplets. The rates of lipid oxidation were also examined. O/W emulsion made of positively charged emulsifier had higher oxygen solubility than negatively charged and neutral emulsifiers. As number and surface area of oil droplet in O/W emulsion increased, higher oxygen solubility was observed, implying that dispersed phases could be places for oxygen molecules. O/W emulsion made of positively charged emulsifier had higher lipid oxidation than neutral emulsifier. O/W emulsion with more interfaces had lower oxidative stability, implying interfaces of association colloids could affect rates of lipid oxidation. Dispersed phase in O/W emulsion can be places for oxygen molecules.

Ethyl acetate fraction of oregano seed protects non-alcoholic fatty liver in high-fat diet-induced obese mice through modulation of Srebp-1c.

Oregano (Origanum vulgare) seed is used as spices and is known to have anti-inflammatory, antibacterial, and antioxidant effects. The anti-fatty liver effects of oregano seed ethyl acetate (OSEA) were evaluated in high-fat diet (HFD)-induced obese mice. OSEA was orally administered with HFD for 10 weeks. The body weight, aspartate aminotransferase, alanine aminotransferase, cholesterol, triglyceride, and low-density lipoprotein levels in the HFD with 100 mg/kg of OSEA significantly decreased by approximately 1.21-, 1.44-, 2.12-, 1.12-, 1.05, and 1.59 times, respectively, while high-density lipoprotein levels increased by approximately 1.05 times compared to those in the HFD group (p < .05). In addition, the distribution of liver fat in the HFD with 100 mg/kg OSEA (OSEA 100) group decreased significantly (p < .05). Therefore, OSEA supplementation can ameliorate fatty liver disease and reduce the accumulation of triglycerides in adipose tissue. The expression of genes involved in liver fat accumulation, such as sterol regulatory element-binding protein-1c (Srebp-1c), fatty acid synthase (Fas), stearoyl-CoA desaturase-1 (Scd1), and acetyl-CoA carboxylase 1 (Acc1), significantly decreased in OSEA 100 by approximately 2.6-, 1.74-, 1.89-, and 1.56-times, respectively (p < .05). Therefore, OSEA may modify obesity and liver fat accumulation by regulating the expression of genes involved in lipid metabolism.

The effect of music-movement therapy on physical and psychological states of stroke patients.

AIMS AND OBJECTIVES: This study evaluated the effects of combined music-movement therapy on physical and psychological functioning of hospitalised stroke patients. BACKGROUND: Few studies have focused on music-movement therapy's effects on physical and psychological functioning of stroke patients. DESIGN: A quasi-experimental design with pre- and post-tests was used. METHODS: A convenience sample was used: patients hospitalised for stroke and within two weeks of the onset of stroke were randomised to either an experimental group (received music-movement therapy in their wheelchairs for 60 minutes three times per week for 8 weeks) or control group (received only routine treatment). The effect of music-movement therapy was assessed in terms of physical outcomes (range of motion, muscle strength and activities of daily living) and psychological outcomes (mood states, depression), measured in both groups pre- and post-test. RESULTS: The experimental group had significantly increased shoulder flexion and elbow joint flexion in physical function and improved mood state in psychological function, compared with the control group. CONCLUSIONS: Early rehabilitation of hospitalised stroke patients within two weeks of the onset of stroke was effective by using music-movement therapy. It improved their mood state and increased shoulder flexion and elbow joint flexion. RELEVANCE TO CLINICAL PRACTICE: The findings of this study suggest that rehabilitation for stroke patients should begin as early as possible, even during their hospitalisation. Nursing practice should incorporate the concept of combining music and movements to improve stroke patients' physical and psychological states starting from the acute phase.

Depression in low-income elementary school children in South Korea: gender differences.

This study examined depression in low-income elementary school children and identified gender differences in factors that influence depression from an ecological perspective. Participants were 262 first- to sixth-grade children recruited from six Korean community centers. Personal factors were anxiety and self-concept. Environmental factors consisted of caregiver (perceived caregiving style), school (perceived school life and quality of peer relations), and neighborhood. The outcome variable was depression. The predictors of boys' depression were anxiety, perceived school life, and neighborhood. Predictors of girls' depression were anxiety, self-concept, caregiving style, and neighborhood. School nurses are encouraged to screen elementary school children for depressive symptoms and consider gender differences and environmental factors when intervening in depression. School-focused interventions may be more effective for boys; family-focused interventions may be more beneficial for girls.

Approaches of lipid oxidation mechanisms in oil matrices using association colloids and analysis methods for the lipid oxidation.

Lipid oxidation is one of the key chemical reactions in foods containing fats and oils during production and storage. For several decades, many researchers have tried to understand the mechanisms of lipid oxidation and ways to control the rates of lipid oxidation. Theories of autoxidation or free radical chain reaction have been developed to successfully explain the phenomenon observed in oxidized lipids. Many studies have been conducted to explain the other factors that can affect the lipid oxidation such as food matrix, oxidation time and temperature, transition metal ions, pigments with sensitizing abilities, and surface-active compounds such as phospholipids, free fatty acids, monoacylglycerols, and diacylglycerols. Several strategies were developed to evaluate the degree of oxidation and oxidative stability. This review provides crucial information on the mechanism of lipid oxidation affected amphiphilic compounds and association colloids. This review article will extensively discuss about the methods for determining the oxidative stability.

Evaluation of deodorization techniques using cyclodextrins on the headspace volatiles and antioxidant properties of onion.

Sulphur-containing volatiles in onion produce unpleasant odors and this limit their usage in foods. To expand its application, several additives including α-cyclodextrin (α-CD), ß-cyclodextrin (ß-CD), 2-hydroxypropyl-ß-cyclodextrin (HP-ß-CD), and chitosan were added to onion solution and evaluated for their effect on sulphur-containing volatiles. Also, antioxidant property using 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging assay and oxidative stabilities in an oil-in-water (O/W) emulsion were carried out. The total volatile contents were decreased in the order of α-CD (50.1%), ß-CD (49.3%), HP-ß-CD (46.2%), and chitosan (7%). Meanwhile, HP-ß-CD showed the highest DPPH radical scavenging ability followed by ß-CD, α-CD, and chitosan with decreasing order. The ß-CD significantly enhanced the oxidative stability of the O/W emulsion, whereas α-CD and ß-HP-CD showed prooxidative behavior. Overall, ß-CD might be used as a sulphur-containing volatile decreasing agent, which could keep the antioxidant properties of onion in the O/W emulsion.

Antioxidant effects and reaction volatiles from heated mixture of soy protein hydrolysates and coconut oil.

Soy protein hydrolysates (SPHs) are prepared from soybean meal using commercially available protease enzymes and acid/alkali treatment. The antioxidant properties of SPHs were evaluated by measuring headspace oxygen consumption and conjugated diene formation in oil-in-water (O/W) emulsions. In addition, volatile profiles were analyzed for the heated mixture of SPHs and the coconut oil (SPHCO). Total amino acid content was the highest in double proteases. SPHs prepared from enzymes acted as better antioxidants than those prepared from acid/alkali treatments in O/W emulsions. SPHs prepared from double proteases generated the highest amounts of total volatiles and nitrogen-containing compounds in SPHCO. 2,3-Dihydro-3,5-dihydroxy-6-methyl-4H-pyran-4-one, 2-methyl-butanal, benzeneacetaldehyde, and 2,6-dimethylpyrazine were the major volatiles in SPHCO. Enzymatic SPHs act as natural antioxidants in the O/W emulsion matrix, and thermal reaction products from SPHCO may contribute to the production of a unique volatile flavor in plant protein-based foods. Supplementary Information: The online version contains supplementary material available at 10.1007/s10068-022-01189-7.

Changes of molecular mobility of ascorbyl palmitate and α-tocopherol by phospholipid and their effects on antioxidant properties in bulk oil.

Molecular mobility of ascorbyl palmitate and α-tocopherol in the presence of 1,2-dioleoyl-sn-glycero-3-phosphocholine (DOPC) were determined by NMR relaxation technique. Synergistic effects of DOPC on the antioxidative capacities of ascorbyl palmitate were evaluated in DPPH radical scavenging assay and bulk oil matrix. NMR relaxation technique can provide information on the mobility of protons. Molecular mobility of two protons in hydroxyl group of ascorbyl palmitate decreased by 85 and 78% in the presence of DOPC compared to those without DOPC. However, proton mobility of α-tocopherol increased by 41% when DOPC was present. DOPC significantly enhanced the DPPH reactivity in medium chain triacylglycerol, while this effect was not observed in α-tocopherol. Mixture of ascorbyl palmitate with DOPC showed synergistic antioxidant properties in corn oil at 60 °C. DOPC may make protons of ascorbyl palmitate in more rigid state, which can enhance hydrogen donating ability and antioxidant properties of ascorbyl palmitate in bulk oils.

Association between lymphotoxin beta receptor gene polymorphisms and IgA nephropathy in Korean children.

Lymphotoxin beta receptor (LTBR) is essential for development and organization of the secondary lymphoid tissues. To investigate whether LTBR polymorphisms are associated with IgA nephropathy (IgAN) in Korean children, One hundred ninety nine patients with IgAN and 289 controls were recruited. Two promoter single nucleotide polymorphisms (SNPs) (rs3759333, -1387C/T and rs3759334, -1326A/G) and one coding SNP (rs2364480, Ala172Ala) in LTBR gene were selected and genotyped by direct sequencing. For analysis of data, SNPStats, SPSS 18.0, and Haploview version 4.2 were used. Multiple logistic regression models (codominant 1, codominant 2, dominant, and recessive models) were performed for odds ratio (OR), 95% confidence interval (CI), and p value. The rs3759334 was significantly associated with IgAN in codominant 1 (G/G vs. A/G, p = 0.025) and dominant (p = 0.017) models. The A alleles of rs3759334 and rs2364480 were related to risk of developing IgAN, respectively (rs3759334, p = 0.015; rs2364480, p = 0.041). Haplotypes CGC and TAA in LTBR gene were also associated with IgAN, respectively (CGC, p = 0.032 in codominant; TAA, p = 0.008 in codominant, p = 0.009 in dominant models). In conclusion, results suggest that LTBR gene polymorphisms may be associated with risk of IgAN in Korean children.

Powerlessness, social support, and glycemic control in Korean adults with type 2 diabetes.

The purpose of this study was to understand the relationship between powerlessness, social support, and glycemic control in Korean adults with type 2 diabetes, taking into consideration their demographic characteristics. A total of 124 adults with type 2 diabetes answered the questionnaires of powerlessness and social support. Glycemic control was measured by glycosylated hemoglobin (HbA1C). Powerlessness score differed significantly with gender, age, and occupation; social support score with education, occupation, and income; and HbA1C level with age and income. The relationship between glycemic control and powerlessness was not significant, but the one between powerlessness and social support was negative. In conclusion, higher level of powerlessness was significantly related to having less social support. Based on this outcome, it is necessary to develop, for Korean adults with type 2 diabetes, an intervention program that improves their social support, which in turn reduces their powerlessness.