Number Of Populations Research Articles

Fermentation characteristics of maize–forage legume mixtures ensiled in small-scale silos

This study was conducted to evaluate the ensiling characteristics of maize–forage legume mixtures in small-scale silos. Sole and intercrops forage materials were harvested 80 days after planting and ensiled in small-scale silos, that is: plastic bags, plastic drums, and small pits, for 60 days. After ensiling, samples were collected to examine the chemical composition, microbial community and fermentation quality. Mixed silages stored in the drum silos had significantly (p ≤ 0.05) higher DM content (35.69%) than that from pit and bag silos. The drum silos had significantly (p ≤ 0.05) higher crude protein concentration (20.57% DM) in sole legume silages than other silo types. Neutral detergent fibre concentration (39.76% DM) of sole forage silages was greatest in bag silos than in other silos. High in vitro dry matter digestibility and water-soluble carbohydrate values (58.15 and 12.19% DM respectively) for mixed silages were recorded in drum silos. Bag silos showed lower numbers of lactic acid bacteria and higher populations of enterobacteria (4.86 and 4.26 log10 CFU g−1 respectively) in sole forage silages than other silos. Mixed silages ensiled in drum silos produced significantly lower (p ≤ 0.05) pH (3.03) and ammonia nitrogen content (3.73% TN) compared to pit and bag silos. The study concluded that ensiling maize–forage legume mixtures in drum silos can have a positive effect on the nutritive value of ruminants’ feeds. Therefore, the recommended forage type for ensiling is mixed silages.

Spatiotemporal analysis of land use/cover change pattern and population growth in Ngawi Regency

Many factors drive land use and land cover change (LULC) including biophysical and socio-economic conditions. Since Ngawi Regency is one of the areas passed by the toll road, in this study we selected Ngawi as the study area to provide an understanding of the land use/cover dynamics caused by economic factors. This study aims to (1) analyse the distribution of land use/cover change before and after the toll road exists and (2) investigate its relationship with population growth. Data on land use/cover was visually interpreted from satellite imageries (2012 and 2020). Population data was taken from the regional statistics bureau. LULC was detected using a Geographic Information System (GIS). The results show that rice fields dominated land use (44.43% and 42.71% of all existing land use in 2012 and 2020, respectively). A land conversion from a rice field to a toll road has been observed covering 45.45 Ha. Although there was an increase in population from 2012 to 2015, the population number gradually decreased from 2016 to 2020. This result indicates that despite the existence of a toll road, it has less relation to the population dynamic in the study area in which other factors may play a role.

Hunting Resource Management by Population Size Control by Remote Sensing Using an Unmanned Aerial Vehicle

The study was carried out on the territory of the Kemerovo region-Kuzbass (Western Siberia, Russia). The purpose of the study was to obtain information on the species diversity and population of big-game animals. The monitoring was carried out on the forest territories of the region’s administrative districts. In the course of remote sensing using an unmanned aerial vehicle, the presence of all types of animals under consideration, except for the bear, was recorded. The deviation of the population number determined using the traditional method of digital technologies varied up to 50%. It was established that environmental measures organized and carried out by the regional administration and hunting farms improved the situation and stabilized the population of the main group of game animals. It was found that when using a sufficiently high sensitivity of the thermal imager (the used thermal imager had a very high sensitivity class ≤ 60 mK at 300 K), long-haired animals, which are characterized by a lower intensity of thermal radiation (for example, wolves) are identified and recognized in the images. The larger the animal and the worse the thermal insulation layer (wool or feathers), the easier it is to identify it in infrared images and the lower the sensitivity requirements of thermal imagers. The ability to recognize and record smaller animals and birds requires additional research on existing technologies. Our research has confirmed the validity of digital remote monitoring methods for managing the wildlife of hunting farms and nature conservation areas of the Siberian Taiga territories.

UNITED CITIES OF THE MOSCOW REGION: THE RESULT OF EVOLUTIONARY DEVELOPMENT OR ADMINISTRATIVE TRANSFORMATIONS

Using the example of the Moscow region and based on the analysis of various information, including data from cellular operators, we studied a poorly explored phenomenon of absorption of some cities (towns) by others. The objectives of the article included the development of an approach to the study of united cities (towns), including an assessment of the preservation of their self-sufficiency as autonomous centers, as well as the identification of factors and stages of integration.It is revealed that in the Soviet period the unification of cities (towns) in the Moscow region occurred as a result of the evolutionary development of neighboring centers and their merger. In recent decades the inclusion of cities (towns) into neighboring centers is mainly the result of artificial amalgamation during the current stage of municipal reform. Based on the example of the three largest takeover cases of recent times (Khimki - Skhodnya, Balashikha - Zheleznodorozhny, Podolsk - Klimovsk), and using the data of cellular operators, we analysed the borders, population numbers and the system of external relations of the population. It is shown that all united cities (towns) under consideration continue to be independent centers (in terms of population size and density, and their role as local centers of labor gravity).The study of the absorbed cities (towns) of the Moscow region made it possible to identify the stages of their integration. It is revealed that after formal administrative subordination, the united center goes through the stages of infrastructural and socio-cultural merger, ending with the stage of complete absorption. It is shown that under the influence of a number of factors (geographical proximity, population size, economic structure, etc.), merger processes can accelerate or slow down.A methodology proposed in the article is aimed at forming an approach to the study of absorbed cities (towns). The latter disappear from the field of view of official statistics and specialists, despite their continued functioning as independent centers for a long time.

Incidence of ADHD medication use among Finnish children and adolescents in 2008-2019: a need for practice changes?

This study examined the incidence of attention-deficit/hyperactivity disorder medication among children and adolescents by sex and age group in Finland during 2008-2019. The data on children and adolescents aged 6-18 years receiving reimbursement for any attention-deficit/hyperactivity disorder medication was collected from the nationwide register on reimbursed purchases. The incidence was calculated as a ratio of the number of new users and the number of age and sex-matched population at risk. Negative binomial models were used to calculate rate ratios (RRs). In 2019, the incidence of attention-deficit/hyperactivity disorder medication was 13.4 per 1000 boys and 4.8 per 1000 girls. Among boys, the incidence became 3.7 times greater during the observed years (RR 95% confidence interval (CI) 2.0, 6.5, P<0.0001), whereas in girls it was 7.6 times greater (RR 95% CI 2.1, 27.4, P=0.0019). The boys had 2.8 times the incidence rate compared with the girls (RR 95% CI 2.2, 3.6, P<0.0001). The increase was associated with age only among boys (P=0.0001). The highest incidence rate 23.4 per 1000 individuals (95% CI 22.5, 24.4) was found in 2019 among 6-8-year-old boys. The incidence of attention-deficit/hyperactivity disorder medication use among children and adolescents increased significantly in Finland during the study period. Incidence was higher among boys, but the increase was greater among girls. The most common group to start attention-deficit/hyperactivity disorder medication was 6-8-year-old boys. These findings warrant critical evaluation of the diagnostic and treatment policies currently available in Finland for the treatment of attention-deficit/hyperactivity disorder and related symptoms.

Social exclusion concepts, measurement, and a global estimate.

Multiple estimates exist of global monetary and multidimensional poverty, but populations at risk of social exclusion still lack a worldwide estimate. This paper fills this gap by providing the first estimates of the share and number of populations at risk of social exclusion worldwide. The paper contributes to the literature in three important respects. First, it develops a conceptual framework of social exclusion that emphasizes the relative, multidimensional, and dynamic features of exclusion. Second, it proposes a macro-counting methodology that allows measuring populations at risk of exclusion based on identity, circumstances, and socioeconomic conditions, while advancing a protocol to avoid double counting of individuals at risk of social exclusion. Third, the empirical strategy provides to the best of our knowledge, the first estimates of populations at risk of social exclusion by dimensions of exclusion on a global and regional scale. Overall, we estimate that between 2.33 and 2.43 billion people-roughly 32 per cent of the global population-are at risk of social exclusion. The South Asia and East Asia and Pacific regions contain 1.3 billion such people, with India and China alone home to 840 million of them. Meanwhile, 52 per cent of sub-Saharan Africa's population is vulnerable to exclusion, the greatest share of any region. Our findings have important policy implications. While antipoverty policies can support household consumption and smooth its volatility among the poor, they are unlikely to address social exclusion stemming from ethnic, racial, or gender discrimination. Therefore, addressing exclusion necessitates a suite of multiple interventions tailored to distinct groups and sustained over time.

Distribution, population size and conservational status of the regionally endangered Large Banded Grasshopper (Arcyptera fusca) in Hungary (Orthoptera: Acrididae)

Summary The abandonment of grasslands is a major threat to the local biodiversity of these habitats. Secondary succession may have a negative effect on species richness, especially in mountain meadows. The Large Banded Grasshopper, Arcyptera fusca (Pallas, 1773) is a typical example throughout Europe. According to former publications and our field survey of 2021, the extant number of populations of this species in Hungary has decreased from 31 to eight in the last decades. Based on the population size estimation carried out in 2021, some of the recent populations of A. fusca in Hungary count only dozens of adult specimens, while the largest ones consist of several hundreds. Their habitats cover ca. 40 hectares in all, in the North Hungarian Mountains. According to the IUCN guidelines, A. fusca should be considered endangered (EN) in Hungary. Our results show that active conservational measures with long term monitoring are important, and necessary to preserve this species together with its biodiversity-rich mountainous habitats in Hungary.

A dataset of genetic diversity studies in the China Seas

Genetic diversity, a fundamental aspect of biodiversity, greatly influences the ecological and evolutionary characteristics of populations and species. Compiling genetic data is crucial as the initial step in comprehending and applying genetic resources; however, regional collating work is still insufficient, especially in marine ecosystems. Here, by conducting a thorough literature search and quality-control procedures, we provide a dataset of genetic diversity studies on marine species in the China Seas. The final dataset comprised a total of 746 studies (encompassing 840 data sets and 3658 populations) across 343 species from 1998 to 2022. For each data set, information including publication year, publication language, studied species, belonged taxonomic group, applied molecular markers, and sampling strategies (number of populations, total number of individuals, etc.) was collated to analyse the scope, strengths, and omissions of these works. This dataset offers a comprehensive overview of genetic diversity studies in the China Seas, which may help to adjust future research focuses, promote conservation and macrogenetics studies in this region, and also facilitate regional cooperation.

Unveiling the Genetic Secrets of Chinese Indigenous Pigs from Guizhou Province: Diversity, Evolution and Candidate Genes Affecting Pig Coat Color.

The local pig breeds in Guizhou possess exceptional meat quality, robust adaptability, and resilience to harsh feeding conditions, making them ideal for producing high-quality pork. With over 10 local pig breeds in the region, we focused on 7 specific breeds: Baixi pigs (BX), Congjiang Xiang pigs (CJX), Guanling pigs (GL), Jianhe White Xiang pigs (JHBX), Jiangkou Luobo pigs (JKLB), Kele pigs (KL), and Qiandong Hua pigs (QDH). Unfortunately, these breeds face threats such as introduced species and inbreeding, resulting in a decline in population size and numbers. To better protect and utilize these breeds, we employed genome-wide single-nucleotide polymorphism (SNP) markers to investigate the population structure, genetic diversity, and selection characteristics of 283 pigs across these seven breeds. Our findings revealed distinct ancestral sources between Chinese and Western pig breeds, as demonstrated by principal component analysis, adjacent tree analysis, and ADMIXTURE analysis. Notably, JHBX exhibited a distant genetic relationship from the other six local pig breeds in Guizhou province, showcasing unique genetic characteristics. While the genetic diversity of the six Chinese native pig populations, excluding JHBX, was generally moderate in Guizhou province, the JHBX population displayed low genetic diversity. Therefore, it is imperative to intensify selection efforts to prevent inbreeding decline in JHBX while further enhancing the protection measures for the other six pig populations. Additionally, we identified candidate genes influencing the size disparity among pigs in Guizhou province through signal selection. Our study outcomes serve as a reference for developing effective conservation and utilization plans for pig breeds in Guizhou province and deepen our understanding of the genetic mechanisms underlying pig body size.

Students Error Analysis in Descriptive Text of UNCP

This research deals with the the kinds of errors of the first semester students of Elementary School Teacher Education Study Program of Palopo Cokroaminoto University mostly do in their writing. The population of this research is the first semester students of Elementary School Teacher Education Study Program of Palopo Cokroaminoto University in academic year 2023. The total number of population was 200 students. The researcher applied the purposive sampling technique and there are 20 students as sample. Writing test is the instrument of this research. Based on the findings and discussion in the previous chapter, the researcher concludes the kinds of errors of the first semester students of Elementary School Teacher Education Study Program of Palopo Cokroaminoto University mostly do in their writing is selection. It can be proven by the kinds of error made by the students are selection error (21 errors or 53.84%), omission error (9 errors or 23.07%), and addition error (9 errors or 23.07%).

Saving the Last West African Giraffe Population: A Review of Its Conservation Status and Management.

The West African giraffe (Giraffa camelopardalis peralta) was historically spread across much of the Sudano-Sahelian zone but is now restricted to Niger. Several factors resulted in their dramatic decline during the late 20th century. In 1996, only 49 individuals remained, concentrated in the 'Giraffe Zone'. Conservation activities implemented by the Government of Niger, supported by local communities and NGOs, facilitated their population numbers to increase. This review summarizes past and present conservation activities and evaluates their impact to advise and prioritize future conservation actions for the West African giraffe. The long-term conservation of the West African giraffe is highly dependent on the local communities who live alongside them, as well as supplementary support from local and international partners. Recent conservation initiatives range from community-based monitoring to the fitting of GPS satellite tags to better understand their habitat use, spatial movements to expansion areas, and environmental education to the establishment of the first satellite population of West African giraffe in Gadabedji Biosphere Reserve, the latter serving as a flagship for the future restoration of large mammal populations in West Africa. The integration of modern technologies and methods will hopefully provide better-quality data, improved spatial analyses, and greater understanding of giraffe ecology to inform the long-term management of West African giraffe.

Evaluación de los niveles de metales pesados (As, Hg, Zn, Cu y Se) en aves rapaces silvestres y hábitats acuáticos

Birds are used as bioindicators to determine the negative effects of environmental pollution on human, animal, and environmental health. Among the terrestrial bird species in the study are: the common buzzard (Buteo buteo); black kite (Milvus migrans), common kestrel (Falco tinnunculus); among the aquatic bird species, marsh harrier (Circus aeruginosus), white stork (Ciconia ciconia), gray heron (Ardea cinerea) were used. Heavy metals As, Hg, Zn, Cu, and Se were analysed in blood samples by inductively coupled plasma mass spectrometry (ICP–MS). In the study, Hg and Se concentrations were generally higher and As concentrations were generally lower than those reported in the literature. In black kites, which are vulnerable to environmental contamination and pollution has serious effects on population numbers, it was observed that heavy metals other than As metal were generally higher than the values determined in the studies. Pollutants in nature need to be evaluated by taking into account species–specific differences, age, gender, habitats, migration periods, biomass and feeding habits.

Physical Activity and Quality of Life in the Island Community of Pulau Manado Tua

The quality of life of elderly is a form of satisfaction with the needs of the elderly, which can be influenced by various factors such as physical health, psychological health, social relationships, and environment. In elderly, weaknesses, limitations, and disabilities in performing daily activities can result in a decline in quality of life. The increase in the number of elderly population in Indonesia is also accompanied by an increase in the issues faced by the elderly, which impact the decline in quality of life. Physical activity is one of various factors that influence quality of life. The elderly living in island areas may have a lifestyle that differs from those living in urban areas, which can impact the quality of life experienced by the elderly. Pulau Manado Tua is an island area that is part of the Manado City in North Sulawesi Province, Indonesia. With 141 respondents, this study measures the level of physical activity and quality of life among the elderly in island areas. The research design was cross-sectional study of the elderly population in Pulau Manado Tua. Data collection methods include using the IPAQ questionnaire to measure physical activity and EQ-5D to measure quality of life. Univariate and bivariate analyses were conducted using appropriate statistical tests. The main results indicate a relationship between physical activity and quality of life in the community of Pulau Manado Tua. It is hoped that the results of this study can serve as a basis for the formulation of health policies related to quality of life and its influencing factors.

The Impacts of Arctic Climate Change on Polar Bear Biodiversity and Associated Analysis

The Arctic is undergoing rapid weather changes, posing a grave threat to the iconic animal that inhabits the region - the polar bear. This paper reviews the tremendous impacts of climate change on the ecological diversity of polar bears, examining in detail the changes to their distribution, habitat use, food supply, and population numbers. The current understanding of their environmental evolution and adaptability remains insufficient. This conference underscores that studying polar bears benefits the whole world, as they are a fascinating megafauna and a defining symbol of the Arctic. The report consolidates obvious survey findings, articulates the urgent need to study environmental conservation issues further, and proposes initiatives going forward. In summary, this story ties the conservation of polar bears to maintaining the fragile balance in the Arctic, as climate change brings growing disturbances to ecosystems globally. Further investigating these interlinked relationships and taking targeted conservation measures will aid efforts to preserve this vibrant yet fragile polar region.

Forecasting the potential impact of cell and gene therapies in France: projecting product launches and patients treated.

To evaluate the potential impact of cell and gene therapies (CGTs) in France by forecasting the number of patients that will be treated with CGTs over the period 2023-2030 by therapeutic area and region. A review of CGTs in clinical development and related disease epidemiology was conducted to forecast the number of CGT launches and patient population between 2023 and 2030. The number of expected launches was identified by filtering the clinical development pipeline with estimated time to launch and probability of success values from Project ALPHA. Disease prevalence and incidence in France were combined with projected adoption rates derived from historical data to forecast the patient population to be treated. Up to 44 new CGTs are forecasted to launch in France in the period 2023-2030, which translates into more than 69,400 newly treated patients in 2030. Leading indications in terms of newly treated patients per year include cardiovascular disease, hematological cancers and solid tumors with 27,300, 15,200 and 13,000 newly treated patients in 2030, respectively. The forecast suggests that the future landscape of CGTs will undergo a shift, moving from CGTs targeting (ultra) rare diseases to more prevalent diseases. In France, this will likely pose organizational challenges hindering patient access to these transformative therapies. Further research and planning around network organization and patient distribution are needed to assess and improve the readiness of the French healthcare system for ensuring access for this growing number of patients to be treated with CGTs.

Chronic diseases spectrum and multimorbidity in elderly inpatients based on a 12-year epidemiological survey in China

BackgroundThe number and proportion of the elderly population have been continuously increasing in China, leading to the elevated prevalence of chronic diseases and multimorbidity, which ultimately brings heavy burden to society and families. Meanwhile, the status of multimorbidity tends to be more complex in elderly inpatients than community population. In view of the above concerns, this study was designed to investigate the health status of elderly inpatients by analyzing clinical data in Chinese People's Liberation Army (PLA) General Hospital from 2008 to 2019, including the constitution of common diseases, comorbidities, the status of multimorbidity, in-hospital death and polypharmacy among elderly inpatients, so as to better understand the diseases spectrum and multimorbidity of elderly inpatients and also to provide supporting evidence for targeted management of chronic diseases in the elderly.MethodsA clinical inpatients database was set up by collecting medical records of elderly inpatients from 2008 to 2019 in Chinese PLA General Hospital, focusing on diseases spectrum and characteristics of elderly inpatients. In this study, we collected data of inpatients aged ≥ 65 years old, and further analyzed the constitution of diseases, multimorbidity rates and mortality causes in the past decade. In addition, the prescriptions were also analyzed to investigate the status of polypharmacy in elderly inpatients.ResultsA total of 210,169 elderly patients were hospitalized from January 1st, 2008 to December 31st, 2019. The corresponding number of hospitalizations was 290,833. The average age of the study population was 72.67 years old. Of the total population, 73,493 elderly patients were re-admitted within one year, with the re-hospitalization rate of 25.27%. Malignant tumor, hypertension, ischemic heart disease, diabetes mellitus and cerebrovascular disease were the top 5 diseases. Among the study population, the number of patients with two or more long-term health conditions was 267,259, accounting for 91.89%, with an average of 4.68 diseases. In addition, the average number of medications taken by the study population was 5.4, among which, the proportion of patients taking more than 5 types of medications accounted for 55.42%.ConclusionsBy analyzing the constitution of diseases and multimorbidity, we found that multimorbidity has turned out to be a prominent problem in elderly inpatients, greatly affecting the process of healthy aging and increasing the burden on families and society. Therefore, multidisciplinary treatment should be strengthened to make reasonable preventive and therapeutic strategies to improve the life quality of the elderly. Meanwhile, more attention should be paid to reasonable medications for elderly patients with multimorbidity to avoid preventable side effects caused by irrational medication therapy.

A56 EVALUATING THE DYNAMICS OF CYP3A11 AND REG3G MODULATION BY IL-22

Abstract Background IL-22 is a cytokine produced by a number of immune cell populations, including type 3 innate lymphoid cells. We have shown previously that IL-22 suppresses the expression Cyp3a11 in the mouse intestine, a gene that encodes a drug metabolizing enzyme that accounts for roughly 70% of total drug metabolism. In addition, IL-22 induces the expression of Reg3g, the gene that encodes an antimicrobial C-type lectin that has bactericidal activity against Gram+ bacteria in the small intestine. Modulation of these proteins can influence both the oral bioavailability of drugs and microbial composition. Aims The aim of this study was to define the existence of reversible modulation of IL-22 on Cyp3a11 and Reg3g expression in the intestinal epithelium. Methods In vitro enteroids from each part of the mouse small intestine were cultured in 3D in the presence or absence of IL-22 for 5 days. Cyp3a11 and Reg3g transcript expression was evaluated by qPCR followed by protein analysis to define their modulation at varying timepoints after IL-22 treatment cessation. Results IL-22 reduced Cyp3a11 expression, an effect that normalized the day after treatment cessation. However, 4 days after treatment cessation there was rebound hyperexpression of Cyp3a11 in duodenal enteroids, which normalized the following day. IL-22 reduced the expression and activity of Cyp3a11 which normalized soon after stopping IL-22 treatment. In contrast, IL-22 induced the expression of Reg3g, an effect that lasted up to 5 days after treatment cessation. The effect of IL-22 on Cyp3a11 expression and activity was rapidly reversed in contrast to the effect on Reg3g which was more prolonged. Conclusions IL-22 suppresses the expression of Cyp3a11 and induces the expression of Reg3g. The reversible nature of these effects is different between both, with the increased expression of Reg3g 5 days after IL-22 treatment cessation. These data suggest that the regulation of gene expression, protein or enzyme activity by IL-22 may exhibit varying temporal effects and should be considered when assessing its role in intestinal mucosal biology. Funding Agencies This work was funded by the Dr. Lloyd Sutherland Chair in IBD/GI Research and the Weston Foundation.

Pyroxasulfone Metabolism in Resistant Lolium rigidum: Is It All Down to GST Activity?

Resistance to the herbicide pyroxasulfone has slowly but steadily increased in agricultural weeds. The evolved resistance of one Lolium rigidum population has been attributed to the conjugation of pyroxasulfone to reduced glutathione, mediated by glutathione transferase (GST) activity. To determine if GST-based metabolism is a widespread mechanism of pyroxasulfone resistance in L. rigidum, a number of putative-resistant populations were screened for GST activity toward pyroxasulfone, the presence of GSTF13-like isoforms (previously implicated in pyroxasulfone conjugation in this species), tissue glutathione concentrations, and response to inhibitors of GSTs and oxygenases. Although there were no direct correlations between pyroxasulfone resistance levels and these individual parameters, a random forest analysis indicated that GST activity was of primary importance for L. rigidum resistance to this herbicide.

The Effect Of Population Size And Number Of Motor Vehicles On Local Tax Revenue With GRDP As A Moderating Variable

Local taxes play a crucial role in advancing a region. Besides financing local government expenditures, local taxes also enable regional governments to create greater fiscal autonomy, providing flexibility in fund allocation. However, the contribution of local taxes to regional revenue remains relatively small, at only 38%. Therefore, it is essential to identify factors influencing local tax revenues across all provinces in Indonesia to optimize local tax revenue. This research employs linear regression with generalized least square (GLS). The results indicate that the population size, the number of motorized vehicles, Gross Regional Domestic Product (GRDP), interaction between population size and GRDP, and interaction between the number of motor vehicles and GRDP, have a significant effect on local tax revenues simultaneously. However, partially, the population size does not affect local tax revenues. On the other hand, the number of motor vehicles and GRDP positively influence local tax revenues. Furthermore, the moderation regression analysis reveals that GRDP strengthens the influence of the population size on local tax revenues. Conversely, the interaction between GRDP and the number of motor vehicles shows that GRDP weakens the positive effect of the number of motor vehicles on local tax revenues.

Age- and cause-specific contributions to increase in life expectancy at birth in Korea, 2000–2019: a descriptive study

BackgroundKorea’s life expectancy at birth has consistently increased in the 21st century. This study compared the age and cause-specific contribution to the increase in life expectancy at birth in Korea before and after 2010.MethodsThe population and death numbers by year, sex, 5-year age group, and cause of death from 2000 to 2019 were acquired. Life expectancy at birth was calculated using an abridged life table by sex and year. The annual age-standardized and age-specific mortality by cause of death was also estimated. Lastly, the age and cause-specific contribution to the increase in life expectancy at birth in the two periods were compared using a stepwise replacement algorithm.ResultsLife expectancy at birth in Korea increased consistently from 2010 to 2019, though slightly slower than from 2000 to 2009. The cause-specific mortality and life expectancy decomposition analysis showed a significant decrease in mortality in chronic diseases, such as neoplasms and diseases of the circulatory system, in the middle and old-aged groups. External causes, such as transport injuries and suicide, mortality in younger age groups also increased life expectancy. However, mortality from diseases of the respiratory system increased in the very old age group during 2010–2019.ConclusionsLife expectancy at birth in Korea continued to increase mainly due to decreased mortality from chronic diseases and external causes during the study period. However, the aging of the population structure increased vulnerability to respiratory diseases. The factors behind the higher death rate from respiratory disease should be studied in the future.