Prapai DejkhamronJeerunda SantiprabhobSupawadee LikitmaskulChaicharn DeerochanawongPetch RawdareeThipaporn TharavanijSirimon ReutrakulChawkaew KongkankaChittiwat SuprasongsinNawaporn NumbenjaponTaninee SahakitrungruangRaweewan LertwattanarakPontipa EngkakulApiradee SriwijitkamolManassawee KorwutthikulrangsriRattana LeelawattanaMattabhorn PhimphilaiSomkiat PotisatPanthep KhananuraksaCherdchai NopmaneejumruslersWannee NitiyanantSiriraj HospitalNational Health Security OfficeFaculty of Medicine, Chiang Mai UniversityFaculty of Medicine, Prince of Songkia UniversityRangsit UniversityVajira HospitalFaculty of Medicine Ramathibodi Hospital, Mahidol UniversityThailand Ministry of Public HealthFaculty of Medicine, Thammasat UniversityThammasat UniversityQueen Sirikit National Institute of Child HealthPhramongkutklao College of MedicineFaculty of Medicine, Chulalongkorn University2022-08-042022-08-042021-04-01Journal of Diabetes Investigation. Vol.12, No.4 (2021), 516-52620401124204011162-s2.0-85103805010https://repository.li.mahidol.ac.th/handle/20.500.14594/78306Aims/Introduction: The Thai Type 1 Diabetes and Diabetes Diagnosed Before Age 30 Years Registry, Care and Network was established in 2014 and involved 31 hospitals. The objective of the registry was to evaluate glycemic control and complications of patients with type 1 diabetes. Materials and Methods: Patients’ demographics, clinical data, frequencies of daily self-monitoring of blood glucose (SMBG), glycemic control and complications were collected. Results: Among the 1,907 type 1 diabetes patients, the mean age was 21.2 ± 11.3 years. The mean glycated hemoglobin level was 9.35 ± 2.41%, with significant variations among age groups (P < 0.001). Conventional insulin treatment and intensive insulin treatment were used in 43 and 57% of patients, respectively. Mean glycated hemoglobin levels were significantly higher in patients treated with conventional insulin treatment compared to those treated with intensive insulin treatment (9.63 ± 2.34 vs 9.17 ± 2.46%, P = 0.002). Compared to the conventional insulin treatment group, significantly more patients in the intensive insulin treatment group achieved good glycemic control (P < 0.001), and fewer had diabetic retinopathy (P = 0.031). The prevalence of microvascular complications increased significantly with age (P < 0.001). Multivariate analysis showed good glycemic control to be associated with age 25 to <45 years, intensive insulin treatment with SMBG three or more times daily and diabetes duration of 1 to <5 years. Conclusions: Most Thai type 1 diabetes patients were not meeting the recommended glycemic target. As a result of this study, the national program to improve the quality of diabetes treatment and education has been implemented, and the results are ongoing.Mahidol UniversityMedicineArticleSCOPUS10.1111/jdi.13390