• 응용통계연구
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• 제30권5호
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• pp.615-632
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• 2017

무작위 통제시험에서와 달리, 관찰연구에서는 편향되지 않은 인과관계를 추론하기 위한 통계적 전략이 필요하다. 최근 잠재범주분석(latent class analysis; LCA)에서 처치의 평균인과효과(average causal effect; ACE)를 추정하기 위한 새로운 방법들이 제안되었으나 이러한 방법들은 실제 데이터를 분석하는 응용 연구에 초점이 맞춰있다. 따라서 ACE의 참값을 알 수 없어 추정 방법의 성능을 평가하는 데 한계가 있다. 본 연구에서는 Park과 Chung(2014)이 제안한 방법을 개선하여, 다항범주형 처치변수가 잠재변수인 상황에서 다항범주형 결과변수에 미치는 인과효과 추정방법을 제안하고 처치변수와 결과변수가 잠재변수 또는 관측변수를 포함하는 여러 상황에서 본 연구가 제안한 인과효과 추정방법의 성능을 모의실험연구를 통하여 평가하고자 한다. 더불어 'National Longitudinal Study of Adolescents Health'자료를 사용하여 미국 여성 청소년 성장과 약물사용에 대한 인과효과를 추론하고자 한다.

• 대한지역사회영양학회지
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• 제5권2호
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• pp.185-192
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• 2000

As the percentage of the elderly in the population increases, research to identify the nutritional and health status of the elderly, to understand the factors influencing on them, and to delay aging have been done actively. It is necessary for these studies to be longitudinal. This study was carried out to assess the change of health-related habits such as dietary behaviors and smoking, alcohol drinking and exercising habit, and health status between previous study(1991/1994) and post study(1998) for middle-aged men and women living in Chonju. For the present study, the data of 63 pairs(23 men and 40 women) were analyzed. They were 11 men and 12 women followed up from 82 men and 100 women surveyed in 1994. Mean ages in the 1991/4 and 1998 studies were 53.6y(range 42-63y) and 59.0y(range 46-72y) respectively. The survey was conducted with interview using a questionnaire including dietary behaviors and health-related habits, and anthropometric measurement and blood test for analyzing biochemical indices in 1991/4 and 1998. To understand these changes over time, $\chi$$^2$-statistics, t-test and paired t-test were analyzed with an SAS package program. As people age, there were significantly decreases in the proportions to eat lightly salted foods and drink alcohol. Significant longitudinal increases in triceps skin fold thickness, ${\gamma}$-GPT and HDL-cholesterol and significant decrease in hemoglobin value were noted over time in both men and women. In addition a significant decrease in blood glucose level was noted over time in women. Weight, blood glucose and total cholesterol increased significantly with age in those had had breakfast regularly or those had not used more slat at the table in the past. From this study, were found out the subjects of this study had relatively desirable health-related habits. But as improper health-related habits are likely to result in inappropriate health status(eg, increase in WHR, triglyceride, total cholesterol and LDL-cholesterol), it is recommended that nutrition education in necessary as soon as possible to meet the health elderly.

• 사회복지연구
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• 제45권2호
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• pp.375-402
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• 2014

이 연구는 장애와 그에 따른 부가적 실체(낙인, 편견, 차별,, 사회적 제약 등)들로 인해 낮은 삶의 만족도를 나타내는 장애인들의 삶의 만족도 변화양상을 종단적으로 살펴보고, 그에 대한 예측요인으로서 사회자본의 구성개념인 네트워크와 사회참여의 영향력을 파악하는데 목적이 있다. 이를 위해 2차~5차 장애인고용패널조사 자료를 활용해, 3206명을 대상으로 잠재성장모형 분석을 실시하였다. 분석결과, 장애인의 삶의 만족도는 시간이 흐를수록 감소하는 경향을 나타냈으며, 초기 높은 삶의 만족도를 나타낸 장애인의 경우 시간이 흐를수록 완만하게 감소하고, 낮은 삶의 만족도를 나타낸 장애인의 경우 가파르게 감소하는 경향을 보였다. 삶의 만족에 영향을 미치는 네트워크와 사회참여의 영향력을 살펴보면, 네트워크는 삶의 만족도 초기 값에 정적인 영향을, 변화율에는 부적인 영향을 미쳤다. 사회참여는 삶의 만족도 초기 값에 정적인 영향을 미쳤으나, 변화율에는 영향을 미치지 못하였다. 이러한 결과를 바탕으로 실천적 개입방안과 정책적 함의를 제시하였다.

• 사회복지연구
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• 제48권2호
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• pp.303-329
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• 2017

본 연구에서는 아동발달의 변화성과 다양성을 고려하여 시간의 경과에 따라 학령기 아동의 게임 사용시간의 변화궤적을 유형화하고, 각 유형에 영향을 미치는 예측요인을 다차원적으로 검증하였다. 이를 위해 한국아동 청소년패널조사의 초1패널의 2차년도에서 6차년도까지의 자료를 활용하였으며, 본 연구의 최종 분석대상자는 총 1959명이다. 분석방법으로는 학령기 아동의 게임 사용시간 변화궤적 유형화를 위해서 잠재계층성장분석을 실시하였으며, 이후 다중로지스틱 회귀분석을 통해 유의미한 예측요인을 검증하였다. 분석결과, 학령기 아동의 게임 사용시간 변화궤적은 '게임 저사용 증가집단', '게임 초기 고사용-변동 집단', '게임 고사용 증가집단'으로 분류되었으며, 성별, 공격성, 주의집중, 방과후 보호자 부재, 주양육자의 교육수준, 형제자매, 방임, 가구소득, 연간 가족여행 횟수, 학교성적, 또래관계가 각 유형의 분류에 유의미한 영향을 미치는 예측변인으로 나타났다. 이러한 연구결과들을 바탕으로 학령기 초기 아동의 게임 과다사용에 대한 예방적 개입의 필요성을 강조하고 유용한 실천적 제언을 하였다.

• 사회복지연구
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• 제47권4호
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• pp.309-332
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• 2016

본 연구의 목적은 국민건강보험 지역가입자의 부담능력별로 수직적 형평성을 측정하고, 각 부담능력 및 인구학적 특성이 보험료의 변화와 인과관계를 보이는지 종단 분석하는 것이다. 분석대상은 한국복지패널 6차(2011년)-10차(2015년) 조사에 모두 참여한 지역가입자 가구주이다. 분석방법으로는 카크와니(Kakwani) 누적지수 산출 및 패널회귀분석을 적용하였다. 연구결과는 첫째, 2011년-2015년까지 카크와니 지수는 종합소득에 대한 보험료 부과가 역진적임을 나타내고 있다. 둘째, 패널회귀분석 결과 종합소득이 적은 가구일수록 보험료 부담이 통계상 유의미한 부(-)의 영향력을 보여 역진적임을 보였다. 이를 통해 국민건강보험 지역가입자의 보험료 부과체계 개편에 대한 정책적 함의를 제시하였다.

• 한국보건간호학회지
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• 제36권2호
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• pp.227-239
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• 2022

Purpose: This study aimed to examine the differences in the reciprocal causal relationship between cognitive function and depressive symptoms depending on whether older adults lived with others or alone. Methods: We used panel data retrieved from the sixth (Time 1) and seventh (Time 2) waves of the Korean Longitudinal Study of Aging (KLoSA). The study sample included 2,638 older adults living with others and 628 older adults living alone. We conducted cross-lagged panel analyses (CLPA) to identify the bidirectional causal relationship between cognitive function and depressive symptoms in the groups of older adults living with others and those living alone. Results: In the group of older adults living with others, cognitive function and depressive symptoms showed significant reciprocal relationships. In the group of older adults living alone, although the CLPA confirmed that higher levels of depressive symptoms at Time 1 influenced lower levels of cognitive function at Time 2, cognitive function at Time 1 was not associated with depressive symptoms at Time 2. Conclusion: The results suggest that the strategies for preventing cognitive decline and depressive symptoms should be developed according to whether the older adults live alone. Moreover, further studies should identify factors influencing depressive symptoms among older adults living alone, which will ultimately enable the management of depressive symptoms.

• 아동학회지
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• 제31권3호
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• pp.117-138
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• 2010

The purpose of this study was to investigate the effects of early storybook reading intervention participation on the first graders' language abilities in low income families. The subjects consisted of 148 first graders and their primary caregivers. The intervention group was composed of 100 first graders who participated in the early storybook reading intervention program in childcare or kindergarten. The comparison group comprised 48 first graders from equivalent social and economic backgrounds, who did not participate in the program. The language abilities of the children were tested and questionnaires regarding the home literacy environment, children's reading activities at home and parents' perceptions of their children's reading behaviors were completed by the children's primary caregivers. The data were analyzed by means of structural equation modeling. The results indicated that early intervention participation was directly associated with children's higher language abilities in first grade and indirectly influenced the children's language abilities through the home literacy environment, children's reading activities at home and parents' perceptions of their children's reading behaviors.

• 한국생활과학회지
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• 제21권6호
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• pp.1059-1082
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• 2012

The purpose of this study was to analyze the trends, research methodology and findings of various researches on family resilience published in Korea over the past 13 years. A total of 93 publications related to family resilience between 1999 and June of 2012 were analyzed; 72 journal articles and 21 doctoral dissertations which had not been published in academic journals. The results are as follows; (1) There has been steady increase in the number of related researches since 1999, with a significant increase since the mid-2000s as various nontraditional families emerged and the perception of family problems began to change. (2) With regards to the methodology, the majority of the studies were empirical, using quantitative methods in both data collection and analysis. Most measurement scales employed were based on inventories developed by foreign researchers. (3) The research subjects encompass a wide range of individuals and groups from both vulnerable families and families from the general population. Additionally, some researches focused on special interest areas including program development & evaluation and scale development. Although research on family resilience has increased in quantity, there needs to be more qualitative, longitudinal and theory grounded studies on different families and individual types to better understand family resilience in depth. In addition, specific measurement scales reflecting the unique Korean family culture should be developed. Other challenges and suggestions for future research on family resilience are discussed.

• 생물정신의학
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• 제28권2호
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• pp.36-49
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• 2021

Suicide is a leading cause of death worldwide, especially among adolescents and young adults. Considering this fact, it is imperative that we understand the neural mechanisms underlying suicidal thoughts and behaviors in youth from a neurodevelopmental perspective. In this review, we focused on the magnetic resonance imaging studies that examined the neural correlates of suicidal ideations (SI) or attempts (SA) in youth. We reviewed twenty-three cross-sectional studies reporting the structural and functional alterations in association with SI or SA among adolescents and young adults with various mental disorders. The previous literature suggests that the dorsolateral prefrontal cortex, anterior cingulate cortex, and ventral frontolimbic circuit, may play an important role in the pathophysiology of suicidal behavior in youth through altered top-down control over emotion and impulsivity. Future studies with a longitudinal design and using multimodal imaging techniques may be of help to identify novel therapeutic targets specific for youth with suicidal thoughts and behaviors.

• 대한간호학회지
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• 제24권2호
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• pp.278-302
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• 1994

This article reviewed and analyzed 39 studies on self efficacy theory applied to health related behavior. The following analysis was done : 1) study subjects 2) measurement tools 3) analysis according to the type of research design(intervention re-search, explanatory research). Some findings are summarized as follows : The study subjects were both healthy people in various developmental stages and patients with various illnesses. The health related behaviors examined in the studies were also various including exercise, smoking cessation, self care behaviors, etc. The measurement of self efficacy was done with specific tools in most studies. In the tools, activities that measured the health behavior domain were listed according to increasing difficulty or contexual arrangement or in combination of both of them The analysis of 17 intervention research studies showed that generally the intervention program increased the self efficacy level of subjects and then the increased strongly self efficacy influenced behavioral changes. Most studies used more than one intervention method for increasing the self efficacy level. these were derived from sources of self efficacy suggested by Bandura. The analysis of 21 explanatory research studies showed that self efficacy strongly influenced behavior change and persistence. The major independent variable to affect the self efficacy was performance accomplishment in the past. Self efficacy explained more of the variance in health related behavior when it was applied with the variables in the health belief model, health promotion model, and reasoned action theory. On the basis of the above findings, the following suggestions are made : 1. For a desirable research design, self efficacy should be the intervening variable. That is, desirable designs would include intervention-self efficacy-behavior in intervention research studies and antecedent-self efficacy-behavior in explanatory research studies. 2. More prospective, longitudinal studies are needed to test the effect of self efficacy on persistence in health related behavior. 3. Studies comparing the effects of intervention methods are needed for each health related behavior, subject group, and context. 4. It is necessary to develop a reliable, valid measurement tool for self efficacy for each health related behavior. 5. Studies to differenciate the effect of self efficacy from that of outcome expectation on the health related behavior are necessary. 6. The antecedents of self efficacy should be investigated further.