Nan Sook Park

Dr. Nan Sook Park

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Research Focus & Metrics

Academic Career Length

24Years (2003-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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3 February 2009 in Journal of Applied Gerontology
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NPNan Sook Park
Nan Sook Park
The purpose of this study is to explore social engagement and its relationship to the psychological well-being of older adults residing in assisted living facilities (ALFs). Drawing on activity theory, the study focuses on the salience of social relationships on residents' life satisfaction and depressive symptoms. A total of 82 residents were interviewed face-to-face in eight ALFs in a southern state of the United States. The data were analyzed using hierarchical regression models in that demographic and health variables, site characteristics, and social engagement variables were entered into the model in successive steps. Results indicate that perceived friendliness of residents and staff was significantly associated with life satisfaction and depressive symptoms controlling for other variables, and enjoyment of mealtimes was related to low depressive symptoms. Findings suggest that ALFs could promote residents' psychological well-being by encouraging residents to develop meaningful relationships within the facility and by designing enjoyable mealtimes.

28 August 2012 in The Journals of Gerontology, Series B: Psychological Sciences and Social Sciences
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NPNan Sook Park
Nan Sook Park
YJYuri Jang
Yuri Jang
BLBeom S. Lee
Beom S. Lee
WHWilliam E. Haley
William E. Haley
DCDavid A. Chiriboga
David A. Chiriboga
This study conceptualized loneliness as a mediator in the relation between social engagement and depressive symptoms and explored gender differences in the mediation model. Various indices of social engagement were considered including living arrangement, social network, and activity participation. Using data from 674 community-dwelling Korean American older adults, we first examined the mediation effect of loneliness in the relation between each of 3 indices of social engagement (not living alone, social network, and activity participation) and depressive symptoms. Subsequently, gender differences in the mediation model were examined. As hypothesized, loneliness was found to mediate the relation between each of the indices of social engagement and depressive symptoms in both men and women. We also observed gender differences in the strength of mediating effects; the effect of living alone was more likely to be mediated by loneliness among men, whereas women showed greater levels of mediation in the models with social network and activity participation. Our findings suggest that loneliness may explain the mechanism by which deficits in social engagement exerts its effect on depressive symptoms and that gender differences should be considered in interventions targeting social engagement for mental health promotion.

25 July 2013 in The Journals of Gerontology, Series B: Psychological Sciences and Social Sciences
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Journal Article
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NPNan Sook Park
Nan Sook Park
YJYuri Jang
Yuri Jang
BLBeom S. Lee
Beom S. Lee
JKJung Eun Ko
Jung Eun Ko
WHWilliam E. Haley
William E. Haley
DCDavid A. Chiriboga
David A. Chiriboga
In the context of social convoy theory, the purposes of the study were (a) to identify an empirical typology of the social networks evident in older Korean immigrants and (b) to examine its association with self-rated health and depressive symptoms. The sample consisted of 1,092 community-dwelling older Korean immigrants in Florida and New York. Latent class analyses were conducted to identify the optimal social network typology based on 8 indicators of interpersonal relationships and activities. Bivariate and multivariate analyses were conducted to examine how the identified social network typology was associated with self-rating of health and depressive symptoms. Results from the latent class analysis identified 6 clusters as being most optimal, and they were named diverse, unmarried/diverse, married/coresidence, family focused, unmarried/restricted, and restricted. Memberships in the clusters of diverse and married/coresidence were significantly associated with more favorable ratings of health and lower levels of depressive symptoms. Notably, no distinct network solely composed of friends was identified in the present sample of older immigrants; this may reflect the disruptions in social convoys caused by immigration. The findings of this study promote our understanding of the unique patterns of social connectedness in older immigrants.

7 May 2015 in Journal of Aging and Health
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Journal Article
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YJYuri Jang
Yuri Jang
NPNan Sook Park
Nan Sook Park
DCDavid A. Chiriboga
David A. Chiriboga
HYHyunwoo Yoon
Hyunwoo Yoon
JKJisook Ko
Jisook Ko
MKMiyong T. Kim
Miyong T. Kim
Objective: Given the importance of social ties and connectedness in the lives of older ethnic immigrants, the present study examined the prevalence of social isolation and its risk factors in older Korean Americans. Method: Using survey data from 1,301 participants ( Mage = 70.5, SD = 7.24), risk groups for marginal social ties with family and friends were identified and predictors of each type of social isolation explored. Results: Male gender and poorer rating of health were identified as common risk factors for marginal ties to both family and friends. Findings also present specific risk factors for each type of social isolation. For example, an increased risk of having marginal ties with friends was observed among individuals with perceived financial strain, greater functional impairment, and a shorter stay in the United States. Discussion: The common and specific risk factors should be incorporated in programs to reduce social isolation in older immigrant populations.

9 March 2017 in Aging & Mental Health
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Journal Article
Closed access
NPNan Sook Park
Nan Sook Park
YJY. Jang
Y. Jang
BLB.S. Lee
B.S. Lee
DCD.A. Chiriboga
D.A. Chiriboga
SCS. Chang
S. Chang
SKS.Y. Kim
S.Y. Kim
The objectives of this study were to (1) develop an empirical typology of social networks in older Koreans; and (2) examine its effect on physical and mental health. A sample of 6900 community-dwelling older adults in South Korea was drawn from the 2014 Korean National Elderly Survey. Latent profile analysis (LPA) was conducted to derive social network types using eight common social network characteristics (marital status, living arrangement, the number and frequency of contact with close family/relatives, the number and frequency of contact with close friends, frequency of participation in social activities, and frequency of having visitors at home). The identified typologies were then regressed on self-rated health and depressive symptoms to explore the health risks posed by the group membership. The LPA identified a model with five types of social network as being most optimal (BIC = 153,848.34, entropy = .90). The groups were named diverse/family (enriched networks with more engagement with family), diverse/friend (enriched networks with more engagement with friends), friend-focused (high engagement with friends), distant (structurally disengaged), and restricted (structurally engaged but disengaged in family/friends networks). A series of regression analyses showed that membership in the restricted type was associated with more health and mental health risks than all types of social networks except the distant type. Findings demonstrate the importance of family and friends as a source of social network and call attention to not only structural but also non-structural aspects of social isolation. Findings and implications are discussed in cultural contexts.

1 April 2008 in The Gerontologist
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Journal Article
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CGCarol A. Giuliani
Carol A. Giuliani
AGAnn L. Gruber-Baldini
Ann L. Gruber-Baldini
NPNan Sook Park
Nan Sook Park
LSLori A. Schrodt
Lori A. Schrodt
FRFranzi Rokoske
Franzi Rokoske
SZSheryl Zimmerman
Sheryl Zimmerman
Purpose: Researchers know little about the physical performance ability of residential care/assisted living (RC/AL) residents and its relationship to adverse outcomes such as fracture, nursing home placement, functional decline, and death. The purposes of this article are to (a) describe the functional characteristics of RC/AL residents, (b) examine the relationships between resident- and facility-level characteristics and physical performance, and (c) determine the predictive value of physical performance for adverse outcomes. Design and Methods: Data came from 1,791 residents in 189 RC/AL facilities participating in the Collaborative Studies of Long-Term Care. At baseline, residents were tested on four performance measures (grip strength, chair rise, balance, and walking speed), and other resident- and facility-level information was collected. Adverse outcomes were measured over 1 year. Results: Average grip strength was 14 ± 7 kg, 61% of residents walked <0.6 m/s (M = 0.41 m/s), 26% could perform five chair rises, and only 19% could perform a tandem stand for a least 1 s. Multivariable analyses showed that more cognitive and functional impairment, depressive symptoms and comorbid conditions, and for-profit ownership were associated with poorer physical performance. Controlling for individual characteristics, we found that better performance on the four physical performance measures was associated with a reduced risk of nursing home placement, fracture, and decline in function over 1 year. Implications: Simple performance measures identify modifiable functional deficits and suggest targeted interventions to prolong independent mobility and aging in place in RC/AL facilities.