Social Determinants of Health and Multimorbidity Among Adults 50 Years and Older in the United States.

BACKGROUND: Living with two or more chronic conditions simultaneously-known as multimorbidity-has become increasingly prevalent as the aging population continues to grow. However, the factors that influence the development of multimorbidity are still not fully understood. OBJECTIVES: The purpose of this study was to investigate the prevalence of multimorbidity among U.S. adults 50 years and older and identify associated factors with multimorbidity. METHODS: We used data from four cycles from the National Health and Nutrition Examination Survey (2011-2018) to examine the associations between social determinants of health and multimorbidity among American adults aged 50 years and older. A set of variables on socioeconomic status and health behaviors was chosen based on the social determinants of health conceptual framework developed by the World Health Organization. In our study, 4,552 participants were included. All analyses were accounted for a complex survey design and the use of survey weights. Multiple logistic regression analyses were performed to examine the associated factors with multimorbidity. RESULTS: The average age was 63.1 years, and 52.9% were female. The average number of chronic conditions was 2.27. The prevalence of multimorbidity was 63.8%, with high cholesterol and hypertension being the most prevalent conditions. In the adjusted model, age, gender, household income, citizenship status, health insurance, healthcare access, body mass index, and smoking status were found to be associated with living with multimorbidity. DISCUSSION: Our results indicate that continued efforts aimed at promoting smoking cessation and maintaining a healthy weight will be beneficial in preventing the onset of chronic conditions. Additional research is warranted to gain a deeper understanding of the interrelationships between gender, race/ethnicity, household income, citizenship status, health insurance, and healthcare access as social determinants of health in the context of multimorbidity. Further research will help us develop targeted interventions and policies to address disparities and improve health outcomes for individuals with multimorbidity.

The Impact of Parental Presence on Emergence Delirium in Pediatric Patients After General Anesthesia: A Systematic Review and Meta-analysis.

PURPOSE: This study reviewed existing literature on parental presence in cases of pediatric patients after general anesthesia and explored its effect on emergence delirium (ED) in the postanesthesia care unit (PACU). DESIGN: Systematic review and meta-analysis. METHODS: After protocol registration, we searched the PubMed, EMBASE, CINHAL, Web of Science, SCOPUS, and CENTRAL databases. Two authors independently searched and selected the relevant studies, assessed their risk of bias, and abstracted the data. The primary outcome was ED, and the additional outcome was pain. We provided the narrative synthesis and meta-analysis results. FINDINGS: Of the 296 articles retrieved, 6 were included in the narrative synthesis, and 5 were used for the meta-analysis. Four studies were randomized controlled trials, and two studies were nonrandomized controlled trials. There were 348 pediatric patients in the parental presence group and 314 pediatric patients in the usual care group. Parental presence effectively reduced the ED score (mean difference, -0.58; 95% confidence interval [CI], -0.84 to -0.31; P < .001). The ED incidence rate (log odds ratio, -0.58; 95% CI, -1.24 to 0.09; P = .090) and pain score (standardized mean difference, -0.24; 95% CI, -0.57 to 0.10; P = .163) were lower in the parental presence group than in the usual care group. However, the differences were not statistically significant. CONCLUSIONS: The presence of parents in the PACU can reduce ED in pediatric patients. Therefore, parental presence may be a useful intervention in the PACU.

A systematic review and pooled prevalence of symptoms among childhood and adolescent and young adult cancer survivors.

AIMS AND OBJECTIVES: To systematically review the existing literature reporting symptoms in childhood and adolescent and young adult cancer survivors and to meta-analyse the pooled prevalence of symptoms. BACKGROUND: Cancer survivors experience various symptoms caused by cancer treatments and their late effects. These symptoms are associated with adverse health outcomes. However, estimates of symptom prevalence vary largely, and no comprehensive review of symptoms has been conducted for childhood and adolescent and young adult cancer survivors. DESIGN: A systematic review. METHODS: This systematic review is registered in PROSPERO registry and was performed following the PRISMA guidelines. PubMed, EMBASE, Cochrane Library, Web of Science, Scopus and CINAHL were searched up to July 2021. Three investigators assessed the eligibility of studies, extracted data and performed quality assessment. The pooled prevalence of symptoms was calculated using a random-effect model. Subgroup analysis was conducted to identify heterogeneity. RESULTS: Sixty-one studies were used to synthesise symptom prevalence, involving 114,184 participants. There were 24 physical symptoms and 10 psychological symptoms reported in two or more studies. The most studied physical symptoms were fatigue and sleep disturbance, and the most studied psychological symptoms were anxiety and depression. Among physical symptoms, drowsiness had the highest prevalence, followed by dry mouth and fatigue. Among psychological symptoms, worry and nervousness had the highest prevalence, followed by difficulty concentrating. CONCLUSIONS: Physical and psychological symptoms are common in the target population. This review provides an up-to-date overview of symptom prevalence, identifying areas for future research. RELEVANCE TO CLINICAL PRACTICE: Education about possible symptoms related to cancer and its treatment should be given while in treatment. Symptoms should also be monitored throughout the survivorship period. Nurses have a critical role in identifying and making referrals for psychological symptoms as well as promoting preventative strategies that enhance well-being.

Effectiveness of Pelvic Floor Muscle Training for Patients Following Low Anterior Resection: A Systematic Review and Meta-analysis.

PURPOSE: The purpose of this systematic review was to identify the effects of pelvic floor muscle training (PFMT) on bowel function and health-related quality of life among patients who have undergone low anterior resection. METHODS: A systematic review and meta-analysis of pooled findings was conducted according to PRISMA guidelines. SEARCH STRATEGY: A literature search was completed using PubMed, EMBASE, Cochrane, and CINAHL electronic databases; we searched studies published in English and Korean languages. Two reviewers independently selected relevant studies, evaluated their methodological quality, and extracted data. Meta-analysis was conducted of pooled findings. FINDINGS: Thirty-six of 453 articles retrieved were read in full and 12 articles were included in the systematic review. In addition, pooled findings from 5 studies were selected for meta-analysis. Analysis revealed that PFMT reduced bowel dysfunction (mean difference [MD] -2.39, 95% confidence interval [CI] -3.79 to -0.99) and improved several domains of health-related quality of life: lifestyle (MD 0.49, 95% CI 0.15 to 0.82), coping (MD 0.36, 95% CI 0.04 to 0.67), depression (MD 0.46, 95% CI 0.23 to 0.70), and embarrassment (MD 0.24, 95% CI 0.01 to 0.46). IMPLICATIONS: Findings suggested PFMT is effective for improving bowel function and enhancing multiple domains of health-related quality of life after low anterior resection. Further well-designed studies are required to confirm our conclusions and provide stronger evidence for the effects of this intervention.

Factors influencing quality of life among childhood cancer survivors in Korea: A quantile regression approach.

Cancer treatment in childhood may negatively affect survivors' quality of life. In this study, we aimed to determine the contributing factors for health-related quality of life (HRQOL) in survivors of childhood cancer in Korea using quantile regression analysis. This study was a secondary analysis. Data were collected from 130 childhood cancer survivors (CCS) from November 2018 to July 2019. Participants completed the Memorial Symptom Assessment Scale, Depression Anxiety Stress Scale, Health-Promoting Lifestyle Profile-II, and 36-Item Short Form Health Survey (physical component summary [PCS] and mental component summary [MCS]). Quantile and multiple linear regressions were used to analyze the factors contributing to HRQOL. The quantile and linear regression models revealed different results on the contributing factors to HRQOL in CCS. Mean PCS and MCS scores were 78.55 (SD = 15.08) and 64.02 (SD = 18.00), respectively. Symptoms (e.g., difficulty concentrating, worrying, pain, and lack of energy), physical activity, spiritual growth, interpersonal relationships, stress management, depression, and anxiety were significant influencing factors in some PCS quantiles, while symptoms, spiritual growth, interpersonal relationships, depression, and stress were significant influencing factors in some MCS quantiles. The findings of this study showed specific contributing factors in CCS with different levels of HRQOL. There is a need for targeted interventions related to risk reduction and stratification for CCS with different HRQOL levels. Symptom management strategies, early detection programs for CCS with psychological distress, and clinical and counseling interventions for CCS with poor HRQOL need to be developed.

Work schedule characteristics and occupational fatigue/recovery among rotating-shift nurses: A cross-sectional study.

AIMS: To determine the effects of work schedule characteristics on occupational fatigue and recovery among rotating-shift nurses in South Korea. BACKGROUND: Understanding the effects of work schedule characteristics on occupational fatigue is important to prevent adverse nurse outcomes and to ensure patient safety. METHODS: This study used secondary data analysis with a cross-sectional design. Data were collected on 436 rotating-shift nurses in 2018. Nurses' occupational fatigue and recovery were measured using the Occupational Fatigue Exhaustion/Recovery Scale. We used quantile regression models. RESULTS: The scores for acute and chronic fatigue and intershift recovery were 70.40, 73.39, and 29.82, respectively. Overtime hours, number of night shifts, number of consecutive days off, and breaks were significant influential factors in some quantiles of acute fatigue, chronic fatigue, and intershift recovery, while total working hours was only associated with chronic fatigue in the 25th quantile. CONCLUSIONS: The quantile and linear regression models revealed different results for work schedule factors that affect occupational fatigue and intershift recovery among rotating-shift nurses. IMPLICATION FOR NURSING MANAGEMENT: These findings have important implications for developing targeted strategies and policies to reduce occupational fatigue and improve intershift recovery for rotating-shift nurses with different levels of occupational fatigue and recovery.

Geospatial Analysis of Age-specific SARS-CoV-2 Transmission Patterns in Households, Korea.

We constructed an age-to-age infection matrix to characterize the household transmission pattern of coronavirus disease 2019 (COVID-19) in Korea. Among 4,048 household clusters, within-age group infection dominated the overall household transmissions. Transmission of severe acute respiratory syndrome coronavirus 2 was more common from adults to children than from children to adults.

Effects of Work Environments and Occupational Fatigue on Care Left Undone in Rotating Shift Nurses.

PURPOSE: This study aimed to examine the effects of work environments and occupational fatigue on care left undone in rotating shift nurses, and to identify the indirect (mediation) effect of work environments on care left undone through nurses' occupational fatigue in South Korean acute care hospitals. DESIGN: This study employed a cross-sectional design using an online survey to collect data from 488 rotating shift nurses of acute care hospitals in Korea between November and December 2018. METHODS: A mobile schedule management application for shift nurses was used to advertise the study and to send a link to the online survey. The survey included questions on the nurses' work environment characteristics, care left undone activities, and the Korean version of the Occupational Fatigue Exhaustion/Recovery scale. Poisson regression was used to explore the relationships among work environments, occupational fatigue, and care left undone. Hayes' Model 4 and a bootstrapping analysis were used to identify the mediating effect of occupational fatigue on the relationship between work environments and care left undone. FINDINGS: The average number of tasks left undone was 3.45 (SD = 2.19). The higher the acute and chronic fatigue levels noted among nurses, the higher were the occurrences of care left undone. Conversely, the higher the intershift recovery level, the lower were the occurrences of care left undone. The results showed a positive relationship between care left undone and overtime hours and the number of patients per nurse. Moreover, nurses' occupational fatigue mediated the relationship between work environments and care left undone. Night shifts per month and the number of consecutive days off had an indirect effect on care left undone through occupational fatigue. CONCLUSIONS: High levels of occupational fatigue and poor intershift recovery among nurses can lead to care left undone. Nurses' occupational fatigue mediates the effect of work environment on care left undone. CLINICAL RELEVANCE: It is crucial for healthcare administrators and leaders to develop policies and mandatory regulations to facilitate better working conditions for nurses, consequently reducing their occupational fatigue and decreasing the occurrence of care left undone in acute care hospitals.

Effects of Nurse-Led Pain Management Interventions for Patients with Total Knee/Hip Replacement.

BACKGROUND: A literature review was conducted to assess nurse-led nonpharmacologic pain management interventions intended for total knee/hip replacement patients. DESIGN: This was a systematic review and meta-analysis. DATA SOURCES: The PubMed, Embase, CINAHL, and Cochrane Library databases were searched to identify relevant studies. REVIEW METHODS: The systematic review was conducted based on the Cochrane Handbook for Systematic Reviews of Interventions and all Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) reporting guidelines. Two reviewers independently selected the studies and appraised their quality. Thereafter, the effects of all described nurse-led nonpharmacologic pain management interventions were estimated regarding pain, anxiety, and satisfaction through a meta-analysis. RESULTS: In total, 219 relevant studies were found through a search. Finally, 23 studies were selected for review, with 17 included in the meta-analysis. Nurse-led nonpharmacologic pain management was effective for pain relief (effect size, -0.22; 95% confidence interval [CI], -0.42 to -0.02), and educational interventions were especially effective (effect size, -0.36; 95% CI, -0.69 to -0.03). Although interventions reduced anxiety and improved satisfaction, these results were not statistically significant based on the analysis. CONCLUSION: Our findings support that nurse-led nonpharmacologic pain management interventions could help reduce pain in patients with total knee/hip replacement by supplementing pharmacologic pain management. IMPLICATIONS FOR NURSING: Nurse-led nonpharmacologic pain interventions should be considered to reduce patient pain with total knee/hip replacement.

The effectiveness of digital self-management interventions on health outcomes among childhood cancer survivors: A systematic review and meta-analysis.

AIMS: The study aimed to review the evidence about existing digital interventions for childhood cancer survivors and examine their effectiveness on health outcomes. DESIGN: Systematic review and meta-analysis. DATA SOURCES: PUBMED, EMBASE, Cochrane, CINAHL, Web of Science, PsycArticles, SCOPUS and PQDT Global databases were searched, and the date last searched was 16 September 2019. REVIEW METHODS: This systematic review followed PRISMA guidelines. Randomized and nonrandomized controlled trials, as well as before-and-after studies, were included. The main outcomes were health-related quality of life and moderate-to-vigorous physical activity. Two authors independently reviewed included studies and assessed methodological quality. Meta-analysis was conducted using statistical software STATA 16.0. RESULTS: Out of the eight eligible studies, four were included in the meta-analysis. The digital self-management interventions were not effective on health-related quality of life and moderate-to-vigorous physical activity. Additionally, the digital self-management interventions increased the moderate-to-vigorous physical activity over time but was not statistically significant. CONCLUSIONS: There is insufficient evidence on the effectiveness of digital self-management interventions in improving health outcomes among childhood cancer survivors. Future randomized controlled trials should be conducted from multiple locations and should include objective measures and means to encourage interaction with health care providers. IMPACT: Digital interventions are increasingly implemented to improve health outcomes among childhood cancer survivors, but their results are inconsistent. Well-designed digital interventions may be beneficial for this population over time. The recommendations proposed in the current review may be useful for developing digital interventions and designing related studies in the future, thereby reducing late effects and improving healthy behaviours among this population.

The effectiveness of preoperative stoma site marking on patient outcomes: A systematic review and meta-analysis.

AIMS: This study systematically reviews the literature regarding preoperative stoma site marking and discusses the effectiveness of the procedure on complication rates, self-care deficits and health-related quality of life (HRQOL). DESIGN: Systematic review and meta-analysis. DATA SOURCE: Our review was conducted following the PRISMA guidelines. PubMed, EMBASE, Cochrane and CINAHL databases were searched to obtain articles published in English. Articles were also retrieved from Korean databases as well. Our last search was conducted on 2 June 2019. REVIEW METHODS: Two reviewers independently selected relevant studies, evaluated their methodological quality and extracted data. Experimental and observational studies were included. Our main focus was on complication rates, self-care deficits and HRQOL. We conducted meta-analysis using the statistical software spss 25.0 and Stata 13.0. RESULTS: Of the 1,039 articles reviewed, 20 were included for review, and 19 were used for quantitative synthesis. Preoperative stoma site marking reduced complication rates (odds ratio [OR]: 0.47; 95% confidence interval [CI]: 0.36-0.62; I2 : 70.6%), lowered self-care deficits (OR: 0.34; 95% CI: 0.18-0.64; I2 : 0%), and increased HRQOL (standardized mean difference, 1.05; 95% CI: 0.70-1.40; I2 : 0%). Quality appraisal results for both the individual studies and the studies overall were excellent. The possibility of publication bias was low. CONCLUSIONS: Our findings indicate that preoperative stoma site marking improves patient outcomes: stoma-related complication rates and self-care deficits decrease and HRQOL rises. For this reason, preoperative stoma site marking should be a mandatory procedure in clinical settings. The practice should also be supported by policymakers and healthcare expert associations. IMPACT: Preoperative stoma site marking reduces overall complication rates by 53% and skin problems by 59%. Preoperative stoma site marking also improves self-care and health-related quality of life. We recommend that preoperative stoma site marking should be a mandatory procedure in clinical settings.

Development of a discharge education program using the teach-back method for heart failure patients.

BACKGROUND: Heart failure (HF) patients have difficulties in self-management after discharge. This study aimed to develop a discharge education program for HF patients using the teach-back method (TBM). METHODS: As a methodological study to develop a program, we applied the analysis, design, development, implementation, and evaluation (ADDIE) model comprised of (1) analysis using EMR data, systematic review, and focus group interviews, (2) design and development of a program draft, (3) tests of program validity using 15 experts, 10 nurses, and 10 patients, and (4) development of the final program. The content validity index (CVI), and understandability and actionability of the educational material were used. RESULTS: The discharge education program provides definitions and information about medication, symptom/weight/diet management, physical activity, and other precautions. The educational method uses TBM. The overall CVI for the program was 0.96, and all item CVIs were greater than 0.8. The understandability and actionability were 90.2 and 91.3 % in patients, and 94.6 and 86.8 % in nurses. The contents and methods of the program were appropriate for patients and providers. CONCLUSIONS: We expect the discharge education program using TBM to enhance self-management among HF patients. The process we used to develop this program could guide researchers and clinical practice.

Developing an integrated curriculum for patient safety in an undergraduate nursing program: a case study.

BACKGROUND: Nursing students' practical training should begin when students can apply core knowledge, skills, and attitudes related to patient safety. This necessitates an integrated curriculum in nursing education that links practice to the theory concerning patient safety to enhance patient safety competencies and quality in nursing care. This study aimed to develop an integrated curriculum that incorporates patient safety factors in the existing curriculum to increase patient safety competencies in nursing students. METHOD: A case study approach was adopted to explain the development processes of a new curriculum integrating patient safety in the existing outcome-based curriculum of a nursing college. Based on the existing outcome-based curriculum of a nursing college, a four-step process was performed to integrate patient safety component, including quality improvement, into the curriculum: 1) literature review, 2) analysis of course syllabus, 3) selection of courses related to patient safety topics, and 4) development of evaluation tool. RESULTS: The integrated patient safety curriculum was based on six topics: patient safety principles, teamwork, communication, patient engagement, risk management and, quality improvement, and International Patient Safety Goals. Based on the characteristics of the course according to the level of students in each year, the curriculum was integrated to address patient safety topics in seven courses (four theoretical and three practical). A Patient safety Competency self-assessment checklist was developed for students to naturally acquire patient safety competencies in clinical settings. CONCLUSIONS: This study demonstrated that patient safety topics should be addressed in both theoretical and practical settings across the entire nursing curriculum per the continuity and sequence of education principles.

Coronavirus Disease Outbreak in Call Center, South Korea.

We describe the epidemiology of a coronavirus disease (COVID-19) outbreak in a call center in South Korea. We obtained information on demographic characteristics by using standardized epidemiologic investigation forms. We performed descriptive analyses and reported the results as frequencies and proportions for categoric variables. Of 1,143 persons who were tested for COVID-19, a total of 97 (8.5%, 95% CI 7.0%-10.3%) had confirmed cases. Of these, 94 were working in an 11th-floor call center with 216 employees, translating to an attack rate of 43.5% (95% CI 36.9%-50.4%). The household secondary attack rate among symptomatic case-patients was 16.2% (95% CI 11.6%- 22.0%). Of the 97 persons with confirmed COVID-19, only 4 (1.9%) remained asymptomatic within 14 days of quarantine, and none of their household contacts acquired secondary infections. Extensive contact tracing, testing all contacts, and early quarantine blocked further transmission and might be effective for containing rapid outbreaks in crowded work settings.

Contact Tracing during Coronavirus Disease Outbreak, South Korea, 2020.

We analyzed reports for 59,073 contacts of 5,706 coronavirus disease (COVID-19) index patients reported in South Korea during January 20-March 27, 2020. Of 10,592 household contacts, 11.8% had COVID-19. Of 48,481 nonhousehold contacts, 1.9% had COVID-19. Use of personal protective measures and social distancing reduces the likelihood of transmission.

Symptom clusters in childhood cancer survivors in Korea: A latent class analysis.

OBJECTIVE: To identify the occurrence of late symptom effects among childhood cancer survivors (CCS), generate subgroups using a latent class analysis and determine whether the subgroups differ in demographic and health-related characteristics and health-promoting lifestyle. METHODS: A cross-sectional survey was conducted on 130 adult CCS in Korea. The Memorial Symptom Assessment Scale was used to perform a latent class analysis based on symptom occurrence to generate subgroups. RESULTS: Difficulty in concentration, lack of energy, worrying, drowsiness, irritability, pain, difficulty in sleeping, nervousness, sadness and dry mouth appeared in more than 50% of the CCS. The three symptom subgroups identified were "all high" (46.2%), "high physical moderate psych" (26.9%) and "moderate physical low psych" (26.9%). The percentage of non-smokers was the highest in the moderate physical low psych subgroup (85.7%; p = .009), and the percentage of heavy alcohol consumption was the highest in the high physical moderate psych subgroup (31.4%; p = .013). Spiritual growth scores and interpersonal relationship scores were statistically different between subgroups (F = 3.35, p = .038; F = 7.55, p = .001 respectively). CONCLUSION: The results could guide the development of intervention programmes to strengthen spiritual growth and interpersonal relationships and facilitate further examination of the causal relationship between smoking and drinking and late symptoms of CCS.

Association between nurses' breaks, missed nursing care and patient safety in Korean hospitals.

AIMS: To examine the relationship between breaks and patient safety in Korean hospitals and determine the mediating effect of missed nursing care on this relationship. BACKGROUND: Breaks during working hours can affect patient safety; however, few studies have examined the relationship between breaks and patient safety in hospitals and their findings were conflicting. METHODS: A cross-sectional online survey was conducted with 399 nurses in Korean hospitals. Multiple linear regression was used to explore the association between breaks, missed nursing care and patient safety. Model 4 of Hayes's (2018) and bootstrapping analysis were employed to identify the mediating effect of missed nursing care. RESULTS: Average break time per shift was about 15 min; most participants had breaks of less than 30 min. Missed nursing care was a complete mediator of the relationship between breaks and patient safety. CONCLUSION: Break length has an indirect effect on patient safety, medication errors and falls with injury through missed nursing care. IMPLICATIONS FOR NURSING MANAGEMENT: More discussion is needed to develop policy and mandatory regulations to ensure sufficient breaks and adequate nurse staffing to reduce missed nursing care and enhance patient safety.

The Effect of a Parental Visitation Program on Emergence Delirium Among Postoperative Children in the PACU.

PURPOSE: The purpose of this study was to examine the effects of parental presence on the incidence of emergence delirium (ED) of children in the postanesthesia care unit (PACU). DESIGN: A quasi-experimental pretest and post-test study with nonequivalent and nonsynchronized control groups. METHODS: About 93 children aged 3 to 6 years undergoing general anesthesia for tonsillectomy were divided into two groups: parental presence and absence. ED was recorded using the Pediatric Anesthesia Emergence Delirium Scale at 0, 10, 20, and 30 minutes after PACU admission. FINDINGS: ED score at each time point in the experimental group was lower than the control group, but not statistically significant. ED score in the experimental group significantly decreased over time (F = 6.98; P = .010). CONCLUSIONS: Parental visitation programs could be effective on the degree of ED in children in the PACU setting. This result may contribute to the establishment of PACU visitation program policy in South Korea.

Rapid Annealing of Cu-In-Ga-Se Precursors by Electron Beam Irradiation Method.

Cu-In-Ga-Se precursors were prepared by RF- and DC-sputtering methods and then irradiated with an in-situ electron beam irradiation unit. Ternary (In,Ga)Se2 and binary CuSe targets were simultaneously used for preparation of precursors. The electron dose and irradiation time were kept constant at 300 seconds and 200 W of RF power, respectively, while intensities of accelerated electrons were varied from 2.5 to 4.5 keV. The thickness of all e-beam irradiated CuInGaSe2 (CIGS) films decreased from 1,250 nm to 470 nm. The crystalline properties of e-beam irradiated CIGS films were clearly shown on all samples and the highest intensity of (112) peak at 3.5 keV. The compositional ratio of Cu/(In + Ga) in the e-beam sample irradiated at 3.5 keV was coincident with that of the precursors. The degree of Ga content on the depth of the e-beam sample irradiated at 3.5 keV was uniformly distributed between the TCO/CdS layer and Mo back contact. Electron beam irradiation onto Cu-In-Ga-Se precursors as a rapid annealing method could be an excellent candidate for crystallization to the Cu(In,Ga)Se2 films.

Multimorbidity and its Associated Factors in Korean Shift Workers: Population-Based Cross-Sectional Study.

BACKGROUND: Multimorbidity is a crucial factor that influences premature death rates, poor health, depression, quality of life, and use of health care. Approximately one-fifth of the global workforce is involved in shift work, which is associated with increased risk for several chronic diseases and multimorbidity. About 12% to 14% of wage workers in Korea are shift workers. However, the prevalence of multimorbidity and its associated factors in Korean shift workers are rarely reported. OBJECTIVE: This study aimed to assess multimorbidity prevalence, examine the factors associated with multimorbidity, and identify multimorbidity patterns among shift workers in Korea. METHODS: This study is a population-based cross-sectional study using Korea National Health and Nutrition Examination Survey data from 2016 to 2020. The study included 1704 (weighted n=2,697,228) Korean shift workers aged 19 years and older. Multimorbidity was defined as participants having 2 or more chronic diseases. Demographic and job-related variables, including regular work status, average working hours per week, and shift work type, as well as health behaviors, including BMI, smoking status, alcohol use, physical activity, and sleep duration, were included in the analysis. A survey-corrected logistic regression analysis was performed to identify factors influencing multimorbidity among the workers, and multimorbidity patterns were identified with a network analysis. RESULTS: The overall prevalence of multimorbidity was 13.7% (302/1704). Logistic regression indicated that age, income, regular work, and obesity were significant factors influencing multimorbidity. Network analysis results revealed that chronic diseases clustered into three groups: (1) cardiometabolic multimorbidity (hypertension, dyslipidemia, diabetes, coronary heart disease, and stroke), (2) musculoskeletal multimorbidity (arthritis and osteoporosis), and (3) unclassified diseases (depression, chronic liver disease, thyroid disease, asthma, cancer, and chronic kidney disease). CONCLUSIONS: The findings revealed that several socioeconomic and behavioral factors were associated with multimorbidity among shift workers, indicating the need for policy development related to work schedule modification. Further organization-level screening and intervention programs are needed to prevent and manage multimorbidity among shift workers. We also recommend longitudinal studies to confirm the effects of job-related factors and health behaviors on multimorbidity among shift workers in the future.