Prevalence and trends in obesity and severe obesity in Korean children and adolescents, 2007-2020: A population-based study.

BACKGROUND: The age-adjusted prevalence of child and adolescent obesity has been stabilized in the Korean population, although severe obesity has increased with adverse health effects. In this study, we detailed the prevalence of and trends in overweight, obesity, and severe obesity in Korean children and adolescents by age group and sex from a nationally representative sample, using a new, 2017 age- and sex-specific reference for body mass index. METHODS: We collected Korea National Health and Nutrition Examination Survey data from the years 2007-2020. A total of 23,595 subjects (11,210 females) aged 2-18 years were included in this study. We calculated the recent prevalence of overweight and obesity, including severe obesity, by weighted data from 2019 and 2020. RESULTS: The prevalence of overweight and obesity (class II and class III obesity) was 23.5% and 14.2% (2.5% and 0.5%), respectively. Males showed a higher prevalence of overweight and obesity. Adolescents aged 13-15 years showed the highest prevalence of severe obesity. A positive linear trend was significant for overweight (p = 0.025), class I obesity (p < 0.001), and class II obesity (p = 0.002) for both sexes and all ages combined. However, the trend of obesity prevalence was different in each subgroup. Comparing pre- and post- COVID-19 pandemic, obesity prevalence seemed to increase, but not significantly. CONCLUSIONS: Despite previous reports that obesity in children and adolescents has remained stable, we found that the prevalence of overweight, obesity, and severe obesity has increased in Korean children and adolescents. The effects of COVID-19 on this trend require further evaluation.

Does coronavirus disease 2019 affect body mass index of children and adolescents who visited a growth clinic in South Korea?: a single-center study.

PURPOSE: This study investigated the impact of coronavirus disease 2019 (COVID-19) on body mass index (BMI) of children and adolescents. METHODS: From May to July 2020, the obesity rate of children and adolescents was compared retrospectively to the corresponding rate in the same period in 2019. The change in height, weight, and BMI of the girls who received a gonadotropin releasing hormone agonist (GnRHa) for precocious puberty (n=53) and the controls (n=31) who visited a growth clinic for early breast budding but were not treated with GnRHa in the first half of 2020 were compared to the corresponding change in the first half of 2019 using a paired t-test. RESULTS: The rate of overweight or obesity in new outpatients (n=113, 83 girls, 30 boys) who visited growth clinics from May to July 2019 was 25.3% for girls and 23.3% for boys. The corresponding rate for the same period in 2020 (n=201, 153 girls, 48 boys) was 31.4% for girls and 45.8% for boys. There was a significant increase in the rate of overweight or obesity. The BMI of the GnRHa treatment group increased significantly from May to July 2019 than during the same period in 2020 (P<0.01). There was no significant difference in BMI between those periods in the control group. CONCLUSION: During the social distancing period, the incidence of obesity was higher in boys than in girls. The obesity rate in girls who visited the growth clinic for early breast budding during routine follow-ups did not increase.

Multisystem Inflammatory Syndrome in Adults or Hemophagocytic Lymphohistiocytosis: A Clinical Conundrum in Fully Vaccinated Adults With Breakthrough COVID-19 Infections.

Hyperinflammatory syndrome with breakthrough coronavirus disease 2019 (COVID-19) infection in a fully vaccinated patient is not a common finding. To the best of our knowledge, this is the first such case of a patient who received the Spikevax/Moderna (elasomeran mRNA-1273) vaccine. The patient exhibited clinical characteristics consistent with both multisystem inflammatory syndrome in adults (MIS-A) and hemophagocytic lymphohistiocytosis (HLH), thus posing a diagnostic challenge. Multi-inflammatory syndrome in COVID-19 patients is frequently seen in the pediatric population, but it is a rare entity in adults especially after receiving COVID-19 vaccination. The pathophysiology of MIS-A is not completely understood yet, but it is believed that this likely occurs due to antibody-mediated immune dysregulation. There is a possibility of enhanced serologic response in patients like ours who are vaccinated and have breakthrough COVID-19 infection, thus paving the way for overwhelming antibody-mediated immune activation. There is a significant overlap between symptoms of MIS-A and other hyperinflammatory syndromes such as HLH; hence, a high degree of clinical suspicion and thorough diagnostic workup is required to explore all differentials. Our case raises concerns regarding the lack of clear algorithms and guidelines to diagnose and manage MIS-A in adults post-COVID-19 vaccination.

Pediatric Endocrinology of Post-Pandemic Era.

The COVID-19 pandemic has brought about significant changes in the global health and medical environment. In order to prevent viral transmission, governments implemented strong social distancing, even lockdowns. The closure of schools has reduced physical activity among children and adolescents. Children, especially those with chronic diseases, are often reluctant to visit or even give up visiting hospitals, resulting in delayed diagnosis or missing the right timing for treatment. New guidelines are needed for the management of patients with endocrine diseases such as diabetes or thyroid disease, as well as children with chronic diseases who need regular clinical monitoring. Therefore, it is necessary to analyze the previous research on pediatric endocrinology reported during COVID-19, guide the direction for future research, and establish guidelines to care for pediatric patients with endocrine diseases in the post-pandemic era.