Influenza vaccination before and during the COVID-19 pandemic in the elderly in South Korea.

Background: Influenza epidemics are a significant cause of mortality and morbidity in older adults; thus, vaccination is recommended. However, the coronavirus disease 2019 (COVID-19) pandemic could affect influenza vaccination.

Methods: The influenza vaccination rate was estimated from the Korea Community Health Survey data from 2011 to 2021 using Joinpoint regression.

Long-Term Survival Prediction Model for Elderly Community Members Using a Deep Learning Method.

In an aging society, maintaining healthy aging, preventing death, and enabling a continuation of economic activities are crucial. This study sought to develop a model for predicting survival times among community-dwelling older individuals using a deep learning method, and to identify the level of influence of various risk factors on the survival period, so that older individuals can manage their own health. This study used the Korean National Health Insurance Service claims data.

The Effect of Neighborhood Deprivation on Mortality in Newly Diagnosed Diabetes Patients: A Countrywide Population-Based Korean Retrospective Cohort Study, 2002-2013.

Background: Neighborhood environmental factors along with individual factors are beginning to make a mark as factors which influence individual health outcomes. The goal of this study is to look at the combined impact of individual and neighborhood socioeconomic status on all-cause mortality in diabetic patients who have just been diagnosed.

Methods: The Korean National Health Insurance (2002-2013) was employed in this cohort research, which used a stratified random sample.

Complete Multipartite Genome Sequence of the Cupriavidus basilensis Type Strain, a 2,6-Dichlorophenol-Degrading Bacterium.

We report the complete 8.94-Mb genome sequence of the type strain of (DSM 11853 = CCUG 49340 = RK1), formed by two chromosomes and six putative plasmids, which offers insights into its chloroaromatic-biodegrading capabilities.

Measuring of quality of care in patients with stroke and acute myocardial infarction: An application of algebra effectiveness model.

Ischemic stroke, hemorrhagic stroke, and acute myocardial infarction (AMI) are diseases with golden hour. This study aimed to identify and compare factors that affect in-hospital mortality in patients with stroke and AMI who admitted via the emergency department.This study used the Korean National Health Insurance claims data from 2002 to 2013.

The effect of neonatal hypothyroidism and low family income on intellectual disability: A population-based cohort study.

Background: To investigate relationships among neonatal hypothyroidism, family income, and intellectual disability, as well as the combined effects of neonatal hypothyroidism and low family income on intellectual disability.

Methods: Data were extracted from the National Health Insurance Service-National Sample Cohort from 2002 to 2011. This retrospective study included 91,247 infants.

Differences in Fracture Incidence According to Caregiver Type in Stroke Survivors.

Background: To assess whether the type of primary caregiver is a risk factor of the incidence of fracture among older adults who have survived a stroke.

Methods: Data from 4282 stroke survivors in the National Health Insurance Service-Senior Cohort (2002-2013) were used in this study. We categorized type of primary caregiver as none, spouse/family caregiver, and formal caregiver.

The effects of continuity of care on hospital utilization in patients with knee osteoarthritis: analysis of Nationwide insurance data.

Background: Korea's rapidly aging population has led to a rise in the prevalence of knee osteoarthritis (which reached upwards of 21.3% in 2017) in elderly people aged 65 years and over. Most patients with knee osteoarthritis require ongoing management in the community or through primary care.

Effects of inhaled corticosteroids /long-acting agonists in a single inhaler versus inhaled corticosteroids alone on all-cause mortality, pneumonia, and fracture in chronic obstructive pulmonary disease: A nationwide cohort study 2002-2013.

Background: Both inhaled corticosteroids (ICS) and long-acting ?-agonists (LABA) have been recommended for the treatment of severe/moderate chronic obstructive pulmonary disease (COPD), but mild COPD has not been frequently studied.

Methods: We performed a prospective cohort study to compare the effect of inhaled corticosteroid (ICS) and ICS/long-acting ?-agonist (LABA) in a single inhaler on all-cause mortality and adverse events, such as pneumonia and fracture, in patients with newly diagnosed chronic obstructive pulmonary disease (COPD). We used representative nationwide cohort data from the Korean National Health Insurance claims database (2002-2013).

The impact of sitting time and physical activity on major depressive disorder in South Korean adults: a cross-sectional study.

Background: Previous studies have examined associations between sitting time and negative health outcomes and mental health. However, the relationship between overall sitting time and major depressive disorder (MDD) in South Korea has not been studied. This study examined the association between MDD and overall sitting time and physical activity in South Koreans.

The association between number of doctors per bed and readmission of elderly patients with pneumonia in South Korea.

Background: There is an urgent need to reduce readmission of patients with pneumonia and improve quality of care. To assess the association between hospital resources and quality of care, we examined the effect of number of doctors per bed on 30-day readmission and investigated the combined effect of number of doctors per bed and number of beds.

Methods: We used nationwide cohort sample data of health insurance claims by the National Health Insurance Service (NHIS) from 2002 to 2013.

Incidence of Pressure Ulcers During Home and Institutional Care Among Long-Term Care Insurance Beneficiaries With Dementia Using the Korean Elderly Cohort.

Objective: To assess whether type of long-term care service is a risk factor of the incidence of pressure ulcers among older adults with dementia who are receiving long-term care insurance (LTCI).

Methods: Data from LTCI beneficiaries (benefit level 1 or 2) with dementia, aged 60 and older (n = 7841), in the Korean Elderly Cohort data set from 2008 to 2013 were used. Type of long-term care service was categorized into home or institutional care using the LTCI Claims Database.

The synergistic effect of breastfeeding discontinuation and cesarean section delivery on postpartum depression: A nationwide population-based cohort study in Korea.

Background: The relationships between breastfeeding discontinuation and cesarean section delivery, and the occurrence of postpartum depression (PPD) remain unclear. Therefore, we aimed to investigate the association of breastfeeding discontinuation and cesarean section delivery with PPD during the first 6 months after delivery.

Methods: Data were extracted from the Korean National Health Insurance Service-National Sample Cohort for 81,447 women who delivered during 2004-2013.

Change in household income and risk for attention deficit hyperactivity disorder during childhood: A nationwide population-based cohort study.

Background: Childhood attention deficit hyperactivity disorder (ADHD) is reported to be more prevalent among socioeconomically disadvantaged groups in various countries. The effect of poverty on child development appears to depend on how long poverty lasts. The timing of poverty also seems to be important for childhood outcomes.

Disparities in Kidney Transplantation Access among Korean Patients Initiating Dialysis: A Population-Based Cohort Study Using National Health Insurance Data (2003-2013).

Background: The socioeconomic status of a person has an impact on his or her access to kidney transplantation as has been reported in western countries. This study examined the association between income level and kidney transplantation among chronic kidney disease patients undergoing dialysis in South Korea.

Methods: We analyzed data from 1,792 chronic kidney disease patients undergoing dialysis and listed in the Korean National Health Insurance Claim Database (2003-2013).

The impact of living arrangements on quality of life among Korean elderly: findings from the Korean Longitudinal Study of Aging (2006-2012).

Purpose: To investigate the impact of different living arrangements on quality of life (QoL) and health-related quality of life (HRQoL) in the elderly.

Methods: We used data from the first to fourth wave of the Korean Longitudinal Study of Aging. Using the first wave as a baseline, the data included 5050 individuals aged 60 years and older with at least one living child.

Discrepancy between short-term and long-term effects of bone marrow-derived cell therapy in acute myocardial infarction: a systematic review and meta-analysis.

Background: Bone marrow-derived cell therapy has been used to treat acute myocardial infarction. However, the therapeutic efficacy of this approach remains controversial. Here, we performed a systematic review and meta-analysis to evaluate short-term and long-term effectiveness of bone marrow-derived therapy.

Impact of continuity of care on preventable hospitalization of patients with type 2 diabetes: a nationwide Korean cohort study, 2002-10.

Objective: To determine whether patients with greater continuity of care (COC) have fewer preventable hospitalizations.

Design: We conducted a cohort study using a stratified random sample of Korean National Health Insurance enrollees from 2002 to 2010. The COC index was calculated for each year post-diagnosis based on ambulatory care visits.

Disparities in the experience and treatment of dental caries among children aged 9-18 years: the cross-sectional study of Korean National Health and Nutrition Examination Survey (2012-2013).

Background: The aim of this study is to examine the association between parental socioeconomic status (SES) and the experience as well as treatment of dental caries among children aged 9 to 18 years.

Methods: Data from 1253 children aged 9-18 years from the Korean National Health and Nutrition Examination Survey (2012-2013) were analyzed. Parental socioeconomic status was measured using household income level and maternal educational level.

Greater continuity of care reduces hospital admissions in patients with hypertension: An analysis of nationwide health insurance data in Korea, 2011-2013.

Objectives: To measure the association between time-dependent COC and recurrent hospital admissions in patients with hypertension.

Data Sources: Korean National Health Insurance Claims Database (KNHI), between 2011 and 2013.

Methods: We used Korean National Health Insurance Claims Database (KNHI) during 2011-2013 to evaluate the association between continuity of care and hospital admission in adult patients with hypertension.

Effects of individual and neighborhood socioeconomic status on the risk of all-cause mortality in chronic obstructive pulmonary disease: A nationwide population-based cohort study, 2002-2013.

Background: Numerous previous studies have shown that individual socioeconomic status (SES) is associated with mortality in patients with chronic obstructive pulmonary disease (COPD), but few empirical studies have evaluated the effects of individual SES and neighborhood deprivation on mortality in COPD patients.

Methods: We performed a prospective cohort study to examine the effect of socioeconomic disparity on all-cause mortality in newly diagnosed COPD patients in a setting with universal health care coverage. We used representative population-based nationwide cohort data from the Korean National Health Insurance claims database (2002-2013).

Impact of Market Competition on Continuity of Care and Hospital Admissions for Asthmatic Children: A Longitudinal Analysis of Nationwide Health Insurance Data 2009-2013.

Background: Ambulatory care-sensitive conditions, including asthma, can be managed with timely and effective outpatient care, thereby reducing the need for hospitalization.

Objective: This study assessed the relationship between market competition, continuity of care (COC), and hospital admissions in asthmatic children according to their health care provider.

Methods: A longitudinal design was employed with a 5-year follow-up period, between 2009 and 2013, under a Korean universal health insurance program.

Association between employment status change and depression in Korean adults.

Objectives: This study investigated the association between employment status and depression.

Methods: Data from the Korea Welfare Panel Study (KOWEPS) collected from 2008 to 2011 were used. A total of 7368 subjects were included in this study after exclusion of subjects with missing data and those who were self-employed or could not work.