• 한국초지조사료학회지
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• 제36권3호
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• pp.223-236
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• 2016

The objective of this study was to construct Italian ryegrass (IRG) dry matter yield (DMY) estimation models in South Korea based on climatic data by locations. Obviously, the climatic environment of Jeju Island has great differences with Korean Peninsula. Meanwhile, many data points were from Jeju Island in the prepared data set. Statistically significant differences in both DMY values and climatic variables were observed between south areas of Korean Peninsula and Jeju Island. Therefore, the estimation models were constructed separately for south areas of Korean Peninsula and Jeju Island separately. For south areas of Korean Peninsula, a data set with a sample size of 933 during 26 years was used. Four optimal climatic variables were selected through a stepwise approach of multiple regression analysis with DMY as the response variable. Subsequently, via general linear model, the final model including the selected four climatic variables and cultivated locations as dummy variables was constructed. The model could explain 37.7% of the variations in DMY of IRG in south areas of Korean Peninsula. For Jeju Island, a data set containing 130 data points during 17 years were used in the modeling construction via the stepwise approach of multiple regression analysis. The model constructed in this research could explain 51.0% of the variations in DMY of IRG. For the two models, homoscedasticity and the assumption that the mean of the residuals were equal to zero were satisfied. Meanwhile, the fitness of both models was good based on most scatters of predicted DMY values fell within the 95% confidence interval.

• Journal of Nutrition and Health
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• 제29권7호
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• pp.806-820
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• 1996

The relationship between exercise and hone mineral density (BMD) was investigated in 153 healthy women. The BMD of lumbar spine, femur(neck, ward's triangle, trochanter) and total body was determined by dual energy X-ray absorptiometry in a group subjects(65) aged 19-59 years who had been exercising(swimming or aerobic dancing) regularly for at least 2 years as well as in a similar group of nonexercising control subjects(88). Weight, height, total lean body mass(=weight-total fat body mass-bone mineral content), animal and meat Ca, Ca index, energy expenditure, BMD, PYD/Cr were significantly higher in the exercisers than the controls. There were significantly negative correlations between age, ALP and osteocalcin and BMD, but significantly positive correlations between weight, BMI, total fat body mass and total lean body mass and BMD. Stepwise multiple regression analysis revealed that total lean body mass may be a better independent predictor to BMD than total fat body mass. The nutrient intakes were more closely related to BMD in the exercisers than the controls, but energy expenditure was more closely related to BMD in the controls than the exercisers Stepwise multiple regression analysis revealed that BMD was closely related to menopause, osteocalcin, age, weight in both groups but energy intake in the exercisers alone, energy expenditure in control alone. In premenopausal women, the exercisers had significantly greater BMD than the controls. But, in postmenopausal women, no significant difference between two groups was detected. When compared to BMD of the subjects with same age range to minimize the effect of age, aerobic dancing appears to be capable of exerting a positive effect on BMD in a group of subjects aged 19-44. However, no relationship of the swimming to BMD could be identified in a group of subjects aged 37-59. The results of this study suggest that the usefulness of exercisng appears to be significantly greater in preemenopausal women than postmenoparusal women and weight bearing activity, aerobic dancing is associated with increasing BMD at the weight bearing sites and could be beneficial in the prevention of bone loss. But the usefulness of swimming on bone should be further investgated.

• 한국산학기술학회논문지
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• 제13권4호
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• pp.1619-1624
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• 2012

본 연구는 여성결혼이민자들의 정신건강수준과 함께 그들의 정신건강에 중요한 영향을 미치는 문화적응스트레스요인을 살펴보고자 하는 목적으로 이루어졌다. 본 연구의 연구대상자는 부산광역시 지역에 거주하는 239명의 여성결혼이민자들이며, 연구대상자들의 일반적 특성을 알아보기 위해서는 빈도 및 백분율을 그리고 문화 적응스트레스가 정신건강에 미치는 영향력을 알아보기 위해서는 단계별 회귀분석을 실시하였다. 연구결과 여성결혼이민자들의 17.6%가 정신건강상 문제가 있는 집단으로 분류되었다. 단계별 투입에 의한 중다회귀분석 결과, 문화적응 스트레스 요인들 가운데 '문화적 충격', '두려움', 그리고 '죄책감'이 정신건강에 영향을 미치는 것으로 나타났다. 이러한 결과에 근거하여 여성결혼이민자들의 정신건강을 향상시키기 위한 실천적 함의를 논의하였다.

• 대한간호학회지
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• 제28권4호
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• pp.846-855
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• 1998

The purpose of the study was to investigate the level of health behavior of school-age children and to identify the predicting variables of the school-age children's health behavior. The subject were 467 children in grades four to six, enrolled in two elementary schools located in two cities. The mean age of the subject was 10.03(SD=1.33). The data were analyzed using t-test, ANOVA, correlation analysis, and stepwise multiple regression. The result are as follows : 1. The mean of the score of health behavior of the school-age children was 154.6, showing that they are practicing health behavior relatively well. 2. There were significant differences in the mean scores of health behavior according to grade (F=6.53 p=.001), sex(t=-3.70, p=.000), educational level of the parents(F=4.92, p=.002 ; F=4.47, p=.004), occupation of the parents(F=3.31, p=.003 ; F=4.76, p=.000), and socioeconomic status(F=11.87, p=.000). 3. There were significant correlations between health behavior and health motivation(r=.53, p=.000), self-concept(r=.32, p=.000), perceived health status(r=.16, p=.000), and health locus of control (r=.15, p=.001). 4. Health motivation, self-concept, grade, socioeconomic status, and health locus of control were identified as predictor variables of health behavior of the school-age children from the stepwise multiple regression analysis. The total percent of variance accounted for by these five variables was 35.0%. From the result, it is suggested that in the development of a school health education program, the effect of health motivation and self-concept to promote student's health behavior in school-age children should be considered.

• Child Health Nursing Research
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• 제9권3호
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• pp.294-300
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• 2003

Purpose: The purpose of the study was to investigate the status of visual health behavior of school-age children and to identify the predicting variables of the school-age children's visual health behavior. Method: The subject was 764 children in grades 4 to 6, enrolled in 2 elementary schools located in urban area. The data were analyzed using t-test, ANOVA, correlation analysis, and stepwise multiple regression. Result: The findings were as follows: 1. The mean of the score of the visual health behavior of school-age children was 41.59(SD=7.22) and there was a significant difference according to grade. 2. There were significant correlations between visual health behavior and self-efficacy for visual health behavior (r=.51, p=.000), motivation for visual health(r=.45, p=.000), perceived benefits(r= .34, p=.000), self-concept(r=.32, p=.000), knowledge of visual health(r=.30, p=.000), health perception for vision(r=.16, p=.000), health locus of control(r=.11, p=.002), and perceived barriers(r=.-.12, p=.000). 3. Self-efficacy for visual health behaviors, knowledge of visual health, motivation for visual health, self-concept, health perception for vision, and perceived benefits were identified as predictor variables of the visual health behavior of the school-age children from the stepwise multiple regression analysis. The total percent of variance accounted by these 6 variables were 36.9％. Conclusion: From the result, it is suggested that the development of comprehensive visual health education program including the component of self-efficacy, health motivation and self-concept to promote the visual health of school-age children.

• 근관절건강학회지
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• 제22권1호
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• pp.40-47
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• 2015

Purpose: The purpose of this study was to identify factors influencing on performance of preventive actions to be exposed to infection in emergency nurses. Methods: Participants were 200 emergency nurses working in a regional emergency medical center, 4 local emergency medical centers, and 5 local emergency medical facilities in B city. The data were analyzed with descriptive statistics, independent t-test, ANOVA, Scheff$\acute{e}$'s test, Pearson's correlation coefficients, and stepwise multiple regression analysis using SPSS/WIN 21.0 programs. Results: There was no difference in performance of preventive actions to be exposed to infection by socio-demographic and job-related characteristics. The results of stepwise multiple regression analysis showed that levels of perception of preventive actions to be exposed to infection (${\beta}$=.40, p<.001) and protective environment on exposure to infection (${\beta}$=.22, p<.001) were significantly associated with performance of preventive actions, explaining 26.3% of the variance. Conclusion: In conclusion, improving performance of preventive actions to be exposed to infection is important to protect emergency nurses from exposure to infection. Thus, efforts to enhance protective environment on exposure to infection and to improve perceptions of preventive actions to be exposed to infection are necessary to improve the performance of preventive actions in emergency nurses.

• 성인간호학회지
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• 제12권4호
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• pp.706-716
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• 2000

The purpose of this study was to provide fundamental data for nursing intervention by assessing self-esteem and quality of life(QL) in patients on hemodialysis and peritoneal dialysis. The subjects of this study were 60 patients on hemodialysis at H university medical center in Seoul and 56 patients on peritoneal dialysis at B company. The analysis was done by using t-test, ANOVA, Scheffe and Stepwise multiple regression. The results were as follows: 1. The average self-esteem score was significantly higher in patients on hemodialysis (27.98) than in patients on peritoneal dialysis (25.64). And there were no statistically significant differences between patients on hemodialysis(128.45) and patients on peritoneal dialysis(122.83) in the scores on QL. Among four factors of QL, hemodiaysis patients showed higher score than peritoneal dialysis patients in all factors. But, only family had statiscally significant differences. Also family showed the highest score in both groups, but psychomental showed the lowest score. 2. In patients on hemodialysis, self-esteem was significantly different by occupation(t=3.122, p=.003) and in patients on peritoneal dialysis by age(F=4.450, p=.007), education level(F=7.458, p=.001) and occupation (t=2.491, p=.017). Also in patients on hemodialysis, QL was significantly different by occupation(t=2.223, p=.033) and in patients on peritoneal dialysis by education level(F=4.007, p=.024), and occupation (t=2.806, p=.007). 3. Self-esteem accounted for 36.3% of variance in QL and monthly income accounted for an additional 6.1% of QL in hemodialysis patients by means of stepwise multiple regression analysis. In peritoneal patients, self-esteem accounted for 65.1% and monthly income accounted for an additional 2.7% in QL.

• Journal of Preventive Medicine and Public Health
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• 제26권3호
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• pp.412-429
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• 1993

For the purpose of promotion of mental health in the rural elderly, the author surveyed 558 elderlies aged 60 years or more, and assessed the prevalence rates of depression and cognitive impairment by using self-rating depression scale of Zung (SDS) and the Korean version of mini-mental state examination (MMSEK). Also the association between depression or cognitive function and socio-environmental factors were investigated. The major findings were as follows ; 1. The prevalence rates of severe depression and cognitive impairment were 20.9% and 14.9% in all the elderly of both sexes, respectively. 2. The rates of depression and cognitive impairment increased with increasing age in both sex groups. The mean scores of SDS increased and the mean scores of MMSEK decreased significantly among them (p<0.01). 3. Those being female, widows or widowers, and those having low levels of physical activity, showed significantly high the mean scores of depression and had significantly low the mean scores of cognitive impairment (p<0.01). 4. The depression scores relating to decreased libido, confusion, psychomotor retardation, hopelessness and indecisiveness were relatively high in both sexes. 5. All the items of mini-mental state examination were significantly correlated with depression. 6. In stepwise multiple regression analysis on depression, MMSEK, level of physical activity, chronic disease, marital status and family income were selected as highly correlated variables, and the $R^2$-value for these variables was 33.7%. 7. In stepwise multiple regression analysis on cognitive function, level of physical activity, age, depression, sex and marital status were selected as highly correlated variables, and the $R^2$-value for these variables was 62.6%. The depression and cognitive impairment of the elderly were positively correlated with nearly all sociodemographic variables.

• 디지털융복합연구
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• 제18권9호
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• pp.453-461
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• 2020

본 연구는 코로나19(COVID-19) 비대면 온라인 학습 참여자의 자기통제력의 예측요인을 규명하고자 시도된 조사연구이다. 연구대상자는 J도 비대면 온라인 학습 참여자 105명을 대상으로, 자가 보고식 설문지를 이용하여 자료수집을 하였다. 자료 분석은 서술적 통계, t-test, ANOVA, scheffe' test, pearson's correlation, stepwise regression을 시행하였다. 연구 결과 코로나19 비대면 온라인 학습 참여자의 자기통제력의 가장 큰 예측요인으로는 자기조절효능감(β=.510, p<.001)으로 자기통제력에 대하여 46.5%의 설명력을 보였고 통계적으로 유의한 자신감(β=.285, p=.001)을 추가하면 자기통제력(Adj. R²= .507, F=36.65, p<.001)에 대한 설명력은 50.7%였다. 이상의 결과로 여러 재난 상황에서 비대면 온라인 학습 참여자의 자기통제력을 증진 시키고 학습 참여자의 자기조절효능감과 자신감을 향상 시키는 근본적이고 지속적인 온라인 오프라인 교육프로그램 개발이 필요하다.

• 지역사회간호학회지
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• 제23권3호
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• pp.338-346
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• 2012

Purpose: The purpose of this study was to examine the association between oral health impact profile, depression and quality of life among community-dwelling elderly persons in South Korea. Methods: The design of this research was cross-sectional descriptive study. The participants were 266 community-dwelling individuals aged 65 and older. Data were collected from November 20 to December 20, 2011. The measurements for assessing the subjects' oral health, depression, quality of life were OHIP-14, GDS-SF and QOL. Data were collected using self-administered or interviewer-administered questionnaires. Collected data were analyzed using descriptive statistics, Pearson's correlation coefficient and stepwise multiple regression. Results: The participants' mean age was 77.68, and 86.5% were female, 42.9% were living-alone elders. Pearson's correlation coefficient analysis found that oral health impact profile was significantly associated with depression (r=-.622, p<.001), QOL (r=-.400, p<.001), number of disease (r=.298, p<.001), age (r=.198, p=.002), education (r=-.149, p=.015), eating habit (r=.185, p=.003). The QOL was explained 54.7% by depression (${\beta}$=-.619), oral health impact profile (${\beta}$=-.127), number of benefited welfare service (${\beta}$=.235), perceived health (${\beta}$=-.327), eating habit (${\beta}$=-.094) using stepwise multiple regression analysis. Conclusion: These results indicate that the intervention program of oral health promotion for community-dwelling elders is needed from now on.