Nationwide trends in the prevalence and incidence of depressive disorders and their correlates among adults with disabilities in Korea from 2006 to 2017.

BACKGROUND: Evidence suggests that people with disabilities are more likely to suffer from depression. Previous studies have focused on depressive disorders in specific disability types or age groups using small-scale cross-sectional samples. We investigated longitudinal trends in the prevalence and incidence of depressive disorders according to disability types and severity levels in the entire Korean adult population. METHODS: The age-standardised prevalence and incidence of depressive disorders were investigated using National Health Insurance claims data from 2006 to 2017. The odds of depressive disorders by type and severity were examined using logistic regression after adjusting for sociodemographic characteristics and comorbidities based on merged 2006 to 2017 data. RESULTS: Both the incidence and prevalence of depressive disorders were higher among the disabled than the non-disabled, with the prevalence gap being larger than the incidence gap. In regression analyses, adjusting for sociodemographic characteristics and comorbidities considerably reduced the odds ratios, particularly for incidence. The severity of disabilities was inversely associated with the incidence of depressive disorders. Brain injury and disabilities in major internal organs were associated with lower odds of developing depressive disorders than in non-disabled individuals. CONCLUSIONS: A significant proportion of depressive disorders in disabled individuals are caused by financial hardships or comorbidities rather than disabilities themselves. We must pay special attention to those who cannot access healthcare services due to severe disabilities and those whose depressive disorders are misdiagnosed as intellectual disabilities. More research is required to elucidate the causal mechanisms underlying depressive disorders in people with various types and severities of disabilities.

U-shaped association between body mass index and health-related quality of life impairment in Korean cancer survivors: a nationwide representative cross-sectional survey.

PURPOSE: Although obesity is an important risk factor for cancer incidence, the effect of body mass index (BMI) on health-related quality of life (HRQoL) after cancer treatment remains unknown. This population-based cross-sectional study assessed different levels of BMI as an important factor associated with impaired HRQoL in long-term cancer survivors. METHODS: The study enrolled 1104 cancer survivors from the fourth to seventh Korea National Health and Nutrition Examination Surveys (KNHANES 2007-2018) who were alive at least 5 years after their cancer diagnoses. The BMI was classified into four categories: < 20 (underweight), 20-22.9 (healthy weight), 23-24.9 (overweight), and ≥ 25 kg/m2 (obese). Impaired HRQoL was defined as the lowest quartile of European Quality of Life 5-Dimensions (EQ-5D) questionnaire scores. RESULTS: Cancer survivors who were underweight or obese were more likely to report health problems on each dimension of the EQ-5D compared to the other BMI groups. In multivariate logistic regression analysis, the two extreme BMI categories were significantly associated with impaired HRQoL (BMI < 20 kg/m2: odds ratio [OR] = 1.73, 95% confidence interval [CI] = 1.08-2.86; BMI ≥ 25 kg/m2: OR = 2.14, 95% CI = 1.41-3.25; P trend = 0.049), especially in the gastrointestinal cancer group (P heterogeneity = 0.007). Moreover, the association between underweight/obese and impaired HRQoL showed a significant sex difference (P heterogeneity = 0.019). CONCLUSIONS: The results of this study suggest that deviations from normal BMI, such as being underweight or obese, are negatively associated with HRQoL in long-term cancer survivors; to some extent, this may depend on cancer type and sex. IMPLICATIONS FOR CANCER SURVIVORS: Reaching or maintaining a healthy weight should be emphasized for cancer survivors as a long-term goal even after cancer treatment.

Disparities in the Diagnosis and Treatment of Bile Duct Cancer in People with Disabilities: A National Cohort Study in South Korea.

We aimed to evaluate the impacts of disability on the diagnosis, treatment, and prognosis of bile duct cancer (BDC) according to the severity and type of disability. Patients diagnosed with BDC were selected from an age- and sex-matched population (1:3 ratio) with or without disabilities from the National Disability Database, the Korean Central Cancer Registry, and the Korean National Health Insurance claims database. The cohort included 15,065 patients with BDC, with a significantly lower rate in those with severe disabilities than in people without or with mild disabilities (110.6 vs. 136.5 vs. 147.6 per 105 persons, respectively). People with severe disabilities were diagnosed with BDC at an earlier age but were less likely to undergo surgery (adjusted odds ratio (aOR) = 0.52, 95% confidence interval (CI): 0.45-0.61) or chemotherapy (aOR = 0.76, 95% CI: 0.61-0.95) compared to those without disabilities. This trend was more evident in patients with mental disabilities. The overall and cancer-specific mortality rates were higher in patients (especially women) with disabilities than in those without. There needs systemic approach to ensure equal access to quality cancer care for people with disabilities.

Complicated Appendicitis Among Adults With and Without Disabilities: A Cross-Sectional Nationwide Study in South Korea.

Objective: Appendicitis is usually diagnosed based on a reliable set of signs and symptoms, and can be effectively treated with surgery, with low morbidity and mortality rates. However, appendicitis is often overlooked in vulnerable populations, including people with disabilities. This study compared 10-year trends of complicated appendicitis between South Koreans with a disability, according to disability severity and type, and those without disabilities. Methods: To identify cases of appendicitis, we used the DRG codes in the National Health Information Database of South Korea. Patients with appendicitis were classified in terms of severity based on the DRG codes. Age-standardized incidence rates were calculated for each year during 2008-2017 according to the presence, type, and severity of the disability. Factors associated with complicated appendicitis were examined by multivariate logistic regression using the most recent data (i.e., 2016-2017). Results: The incidence of complicated appendicitis was higher in people with disabilities, especially those with severe disabilities (26.9 vs. 11.6%). This difference was particularly marked when considering those with a severe disability (aOR = 1.868, 95% CI:1.511-2.309), internal organ problems (aOR = 10.000, 95% CI:5.365-18.638) or a mental disability (aOR = 2.779, 95% CI:1.563-4.939). Conclusions: The incidence of complicated appendicitis was higher in people with disability than in those without disability in all years. There was a substantial difference in the incidence of complicated appendicitis between the severe disability and non-disabled groups. Among the various disability types, the incidence of complicated appendicitis was highest for major internal organ problems, followed by intellectual or psychological disabilities. Our findings may be explained by barriers to healthcare access among people with disabilities, particularly those with a severe disability, internal organ problem, or mental disability.

Impact of hospital volume on people with disability and outcomes for cancer surgery.

BACKGROUND: This study was performed to examine the association between hospital volume and mortality in people with disability. METHODS: A retrospective cohort study was conducted using a data set linking the Korean National Health Service database, disability registration data, and Korean Central Cancer Registry data. Data was gathered from all patients undergoing the four major surgical procedures for cancer care during an 11-year period from 2003 to 2013. RESULTS: For all procedures, patients with disability were more likely to visit low-volume hospitals compared with those without disability. The 30-day mortality rate after each type of surgery at low-surgery-volume hospitals was higher in patients with disability; especially, the mortality rates after colectomy were 1.1% for patients without disabilities and 2.6% for patients severely disabilities. In univariate logistic regression analyses, patients with disability, especially those with severe or intellectual/psychological disabilities, were significantly less likely to undergo treatment at a high-volume hospital compared with patients without disability. In contrast, multiple logistic regression analysis indicated that patients with disability were significantly more likely to undergo gastrectomy (OR 3.76, 95% CI 1.64-8.58), colectomy (OR 3.08, 95% CI 1.46-6.48), and mastectomy (OR 3.92, 95% CI 1.25-12.33) at a high-volume hospital compared with patients without disability. CONCLUSION: Public health policies should focus on patients with disability to reduce health disparities and educate health care professionals, as well as the patients and their families, to alleviate negative perceptions about the need for equal diagnosis and treatment.

Disparities in prostate cancer diagnosis, treatment, and survival among men with disabilities: Retrospective cohort study in South Korea.

BACKGROUND: Disparities in cancer care have not been well documented for individuals with disability. OBJECTIVE: To investigate potential disparities in the diagnosis, treatment, and survival of prostate cancer (PC) patients according to disability status. METHODS: A retrospective cohort study using disability registration data linked to Korean National Health Insurance and national cancer registry data. Totals of 7924 prostate cancer cases among patients with disabilities (diagnosed between 2005 and 2013) and 34,188 PC patients without disability were included. RESULTS: While overall PC stage distribution at diagnosis was similar, unknown stage was more common in patients with severe disabilities compared to those without disabilities (18.1% vs. 16.2%, respectively). People with disabilities were less likely to undergo surgery (33.1% vs. 38.6%, respectively; adjusted odds ratio [aOR] 0.79, 95% confidence interval [CI] 0.74-0.84), and more likely to receive androgen deprivation therapy (ADT) (57.9% vs. 55%, respectively; aOR 1.10, 95% CI 1.04-1.16) compared to those without disabilities. This was more evident for people with severe brain/mental impairment (aORs 0.29 for surgery; 1.52 for ADT). Patients with disabilities had higher overall mortality (adjusted hazard ratio [aHR] 1.20; 95% CI, 1.15-1.25), but only slightly higher PC-specific mortality after adjustment for patient factors and treatment (aHR 1.11, 95% CI 1.04-1.18) than people without disability. CONCLUSIONS: PC patients with disabilities underwent less staging work-up and were more likely to receive ADT than surgical treatment. Overall mortality of PC patients with disabilities was greater than those of PC patients without disability, but PC-specific mortality was only slightly worse.

Disparities in the Diagnosis, Treatment, and Survival Rate of Cervical Cancer among Women with and without Disabilities.

INTRODUCTION: Not much is known regarding the disparities in cancer care between women with and without disabilities. OBJECTIVES: The aim of this study was to investigate the potential disparities in the diagnosis, treatment, and survival of women with cervical cancer with and without disabilities. METHODS: We performed a retrospective cohort study and linked the National Disability Database, Korean Central Cancer Registry, and Korean National Health Insurance claims database. Charlson comorbidity index was used for adjusting the comorbidity. The study population comprised 3 185 women with disabilities (physical/brain, communication, mental, cardiopulmonary, and other impairment) who were diagnosed with cervical cancer and 13 582 age- and sex-matched women without disability who were diagnosed with cervical cancer for comparison. RESULTS: Distant metastatic stage (7.7% vs 3.7%) and unknown stage (16.1% vs 7.0%) were more common in cervical cancer women with grade 1 disabilities, compared with women without disabilities. Women with cervical cancer with disabilities were less likely to undergo surgery (adjusted odds ratio (aOR) 0.81, 95% confidence interval (CI) 0.73-0.90) or chemotherapy (aOR 0.86, 95% CI 0.77-0.97). Lower rate of surgery was more evident in patients with physical/brain impairment (aOR 0.46, 95% CI 0.37-0.58) and severe mental impairment (aOR 0.57, 95% CI 0.41-0.81). The overall mortality risk was also higher in patients with disabilities (adjusted hazard ratio (aHR) 1.36, 95% CI 1.25-1.48). CONCLUSION: Women with cervical cancer with disabilities, especially with severe disabilities, were diagnosed at later stages, received less treatment, and had higher mortality rates, compared with patients who lacked disabilities. Social support and policies, along with education for women with disabilities, their families, and healthcare professionals, are needed to improve these disparities.

Disparities in the Diagnosis and Treatment of Gastric Cancer in Relation to Disabilities.

INTRODUCTION: We investigated potential disparities in the diagnosis, treatment, and survival of gastric cancer (GC) patients with and without disabilities. METHODS: We linked Korean National Disability Registry data with the Korean National Health Insurance database and Korean Central Cancer Registry data. This study included a total of 16,849 people with disabilities and 58,872 age- and sex-matched control subjects in whom GC had been diagnosed. RESULTS: When compared to GC patients without disabilities, patients with disabilities tended to be diagnosed at a later stage (localized stage 53.7% vs 59.0% or stage unknown 10.7% vs 6.9%), especially those with severe disabilities (P < 0.001). This was more evident in patients with mental impairment (localized stage 41.7% and stage unknown 15.2%). In addition, not receiving treatment was more common in patients with disabilities than those without disabilities (29.3% vs 27.2%, P < 0.001), and this disparity was more evident in those with severe disabilities (35.4%) and in those with communication (36.9%) and mental (32.3%) impairment. Patients with disabilities were at slightly higher risk of overall mortality as well as GC-specific mortality compared to people without disabilities (adjusted hazard ratio [aHR] = 1.18, 95% confidence interval: 1.14-1.21 and aHR = 1.12, 95% confidence interval: 1.09-1.16, respectively), and these disparities were more pronounced in those with severe disabilities (aHR = 1.62 and 1.51, respectively). DISCUSSION: Patients with disabilities, especially severe disabilities, were diagnosed with GC at a later stage, received less staging evaluation and treatment, and their overall survival rate was slightly worse compared to those without disabilities.

Differences in diagnosis, treatment, and survival rate of acute myeloid leukemia with or without disabilities: A national cohort study in the Republic of Korea.

We analyzed the patterns of diagnosis, treatment, and prognoses of acute myeloid leukemia (AML) patients with and without disabilities. The data were collected from the National Disability Database, the Korean Central Cancer Registry, and the Korean National Health Insurance claim database. We built a cohort of 2 776 450 people with disabilities and a nondisabled cohort of 8 329 350 people who were selected at a ratio of 1:3 by matching age and sex. From this population, adult patients who were diagnosed with AML were analyzed. The number of patients with AML were 26.74 per 100 000 in people without disabilities and 20.39 per 100 000 in those with disabilities (P < .0001). The proportion of AML patients receiving chemotherapy and those of patients receiving transplants were significantly lower in the disabled population than that of nondisabled populations (71.2% vs 77.1%, P = .0031, and 17.5% vs 26.9%, P = .002). This trend was more pronounced in subgroups of communication disability and major internal organ disorder. The median survival was 10.8 months for patients with disabilities, which was significantly shorter than 17.1 months for those without a disability (P = .002). Individuals with disabilities have a low diagnosis rate of AML and undergo less active treatment, which results in inferior prognosis.

Burnout Among oncologists in the Republic of Korea: A nationwide survey.

PURPOSE: Burnout in oncologists negatively impacts patient care and health care system, as it is associated with poor patient satisfaction, medical errors, leaving current practice, and/or early retirement. Because the quality of life of oncologists is influenced by various factors and ultimately affects the patient's treatment and medical system, we aimed to investigate burnout among oncologists and to identify factors affecting burnout. MATERIALS AND METHODS: A total of 130 oncologists recruited from 13 cancer centers participated in a nationwide survey. Professional Quality of Life scale used to evaluate burnout and multiple regression analysis was performed to identify factors affecting burnout. RESULTS: A total of 144 oncologists were invited, 134 (93.1%) responded, and 130 (90.2%) of those completed the survey. Burnout score of all participants was 49.9, and males was 48.8, females was 53.9, females score was higher than males. According to the hours worked per session, the average burnout score increased with the hours worked per session. Multiple regression analysis showed that influencing or predictive factors in burnout were sex and hours worked per session. CONCLUSION: To reduce burnout in oncologists, organization-directed interventions should be implemented to prevent work overload.

Breast cancer screening disparities between women with and without disabilities: A national database study in South Korea.

BACKGROUND: Health disparities among individuals with disabilities remain underrecognized. The objective of the current study was to investigate: 1) whether disparities exist in breast cancer screening rates among women with disabilities compared with women without disabilities; 2) whether breast cancer screening rates vary according to the type and severity of disabilities; and 3) trends in breast cancer screening disparities according to disability status over time. METHODS: Using national administrative databases concerning disability status and national cancer screening programs in Korea, age-standardized participation rates were calculated according to the type and severity of disabilities. RESULTS: The age-standardized rate for breast cancer screening in individuals with disabilities increased from 30.2% in 2006 to 53.7% in 2015 (change of +23.5%), whereas that among those without a disability increased from 29.3% to 60.1% (change of +30.8%). In general, disability was associated with slightly lower breast cancer screening rates (adjusted odds ratio [aOR], 0.824; 95% CI, 0.820-0.828). However, screening rates were especially low in women with severe disabilities (aOR, 0.465; 95% CI, 0.461-0.469) and among women with autism (aOR, 0.235; 95% CI, 0.143-0.388), renal failure (aOR, 0.342; 95% CI, 0.337-0.348), brain injury (aOR, 0.349; 95% CI, 0.346-0.352), intellectual disabilities (aOR, 0.403; 95% CI, 0.397-0.410), mental disorders (aOR, 0.494; 95% CI, 0.488-0.501), or ostomies (aOR, 0.529; 95% CI, 0.512-0.546). CONCLUSIONS: Even without a cost barrier, significant disparities were found in breast cancer screening participation, especially in women with severe disabilities and brain-related and/or mental disabilities. Policy efforts, such as ensuring the accessibility of information and equipment, transportation support, and access to a usual source of care, should be made to decrease this disparity.

The Effect of Disability on the Diagnosis and Treatment of Multiple Myeloma in Korea: A National Cohort Study.

PURPOSE: This study aimed to determine whether the diagnosis, treatment approach, and prognosis of multiple myeloma (MM) vary according to the presence and type of disability. Materials and Methods: Demographic, socioeconomic, and medical data were obtained from the National Disability Database, the Korean Central Cancer Registry, and the Korean National Health Insurance claims database. An age- and sex-matched cohort was established using a 1:3 ratio constituted with 2,776,450 people with disabilities and 8,329,350 people without disabilities. Adult patients diagnosed with MM were subsequently selected from this cohort. Disabilities were categorized as physical, communication, intellectual or psychological, and affecting the major internal organs. RESULTS: The cohort included 4,090 patients with MM, with a significantly lower rate per 100,000 persons among people with disabilities than among people without disabilities (29.1 vs. 39.4, p < 0.001). People with disabilities were more likely to undergo dialysis treatment at the time of diagnosis (16.3% vs. 10.0%, p < 0.001), but were less likely to undergo autologous stem cell transplantation (37.5% vs. 43.7%, p=0.072). This trend was more evident among patients with intellectual or psychological disabilities. The median overall survival among patients with disabilities was significantly shorter than that among patients without disabilities (36.8 months vs. 51.2 months, p < 0.001). CONCLUSION: In Korea, people with disabilities generally have a lower rate of MM diagnosis, receive less intensive treatment, and have a lower survival rate than people without disabilities.