• Journal of applied mathematics & informatics
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• v.18 no.1_2
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• pp.311-320
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• 2005

Studies in the evolutionary biology of aging require good estimates of the age-dependent mortality rate coefficient (one of the Gompertz parameters). In this paper we introduce an alternative algorithm for estimating this parameter. And we discuss the sensitivity of the estimates to changes in the other model parameters.

• Nutrition Research and Practice
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• v.14 no.4
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• pp.352-364
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• 2020

BACKGROUND/OBJECTIVES: Given the increasing proportion of the Korean population that is aged 65 years and older, the present study analyzed the relationship between diet quality and sarcopenia in elderly persons by using data from the 2008-2011 Korea National Health and Nutrition Examination Survey (KNHANES). SUBJECTS/METHODS: Data for 3,373 persons aged 65 years and over (men: 1,455, 43.1%) were selected from the 2008-2011 KNHANES. Sarcopenia assessments are based on a formula that divides a subject's appendicular skeletal muscle mass (ASM) by their weight (wt) and multiplies that result by 100 ([ASM/wt] × 100). Sarcopenia is present if the subject's result was less than one standard deviation (SD) below the sex-specific mean for a young reference group. For evaluation of diet quality, data obtained via the 24-hour recall method were used to calculate the Diet Quality Index for Koreans (DQI-K). A general linear model was applied in order to analyze general information and nutritional intake according to sarcopenia status. For analysis of the relationship between diet quality and sarcopenia, a binominal logistic regression analysis was undertaken. RESULTS: The sarcopenia prevalence rate among the study subjects aged 65 years and over was 37.6%. The DQI-K of those without sarcopenia was 3.33 ± 0.04 points, while that of those with sarcopenia was 3.45 ± 0.04 points (P < 0.05). The relationship between diet quality and sarcopenia revealed that subjects aged 75 and older had a poor diet quality, and their odds ratio (OR) of sarcopenia presence was significantly higher (OR: 1.807, 95% confidence interval: 1.003-3.254, P < 0.05). CONCLUSIONS: This study revealed that poor diet quality was related to sarcopenia presence in Koreans aged 75 and older. In order to improve the diet quality of the elderly (aged 75 and older), it is necessary to develop dietary improvement guidelines.

• Journal of Korean Public Health Nursing
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• v.35 no.2
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• pp.254-267
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• 2021

Purpose: This study aimed at identifying the factors affecting the service satisfaction of urban elderly, focusing on the outreach community health service in Seoul, and suggesting policy directions for the successful implementation of community care. Method: Individuals aged 65 and 70 who used the outreach community health service from July 2017 to June 2019 were eligible for the survey. A total of 2,028 people were sampled using a proportional allocation method for each autonomous district in the survey which covered 25 districts. A multi-level logistic regression analysis was conducted, taking into account the individual's socioeconomic level, health status, type of service provided, and the healthcare-related environment and service provision period of the autonomous district. Result: The results revealed that the health status of the urban elderly, the type of services provided (health screening, linkage to community health center and clinic/hospital, medical checkup results counseling, frailty evaluation), and personal experience of the service were the major factors associated with the satisfaction with the outreach health services. Conclusion: The development of customized health services based on the close relationship between visiting nurses and the elderly may be considered to promote a sustainable community health care model.