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Background: With increased awareness of type 2 diabetes (T2D) in children and adolescents, an overview of country-specific differences in epidemiology data is needed to develop a global picture of the disease development. Summary: This study examined country-specific prevalence and incidence data of youth-onset T2D published between 2008 and 2019, and searched for national guidelines to expand the understanding of country-specific similarities and differences. Of the 1,190 articles and 17 congress abstracts identified, 58 were included in this review. Our search found the highest reported prevalence rates of youth-onset T2D in China (520 cases/100,000 people) and the USA (212 cases/100,000) and lowest in Denmark (0.6 cases/100,000) and Ireland (1.2 cases/100,000). However, the highest incidence rates were reported in Taiwan (63 cases/100,000) and the UK (33.2 cases/100,000), with the lowest in Fiji (0.43 cases/100,000) and Austria (0.6 cases/100,000). These differences in epidemiology data may be partly explained by variations in the diagnostic criteria used within studies, screening recommendations within national guidelines and race/ethnicity within countries. Key Messages: Our study suggests that published country-specific epidemiology data for youth-onset T2D are varied and scant, and often with reporting inconsistencies. Finding optimal diagnostic criteria and screening strategies for this disease should be of high interest to every country. Trial Registration: Not applicable. [ABSTRACT FROM AUTHOR]

Background: Youth-onset type 2 diabetes (T2D) is increasing in many countries, creating large personal and societal burdens. While many primary health-care professionals (HCPs) are aware of the classic symptoms of T2D, there are several other manifestations that could indicate its presence. Summary: This narrative review summarizes information on these symptoms and indicators, focusing on those less well known. The classic symptoms and comorbidities include frequent urination, excessive thirst, metabolic syndrome, and obesity. In addition to these, the presence of dermatological (e.g., acanthosis nigricans, granuloma annulare, necrobiosis lipoidica diabeticorum, and scleredema), gynecological (e.g., polycystic ovary syndrome, oligomenorrhea, and vulvovaginitis), hepatological (e.g., nonalcoholic fatty liver disease), and psychiatric diseases (e.g., psychosis, depression, and autism) could indicate that a patient has T2D or is at increased risk of T2D. Other less well-known indicators include abnormal blood tests (e.g., oxidized lipids, inflammation markers, hepatokines, and adipokines), prescriptions for antipsychotic medications or statins, and disrupted sleep patterns. Key Message: Due to the diversity of T2D manifestations in young people, primary HCPs need to remain alert to its possible presence. [ABSTRACT FROM AUTHOR]