Prevalence of positive anti-glutamic acid decarboxylase antibody (GADA) results among 401 followed-up patients by medical institution (based on initial measurement)
| Types of medical institutions | Total | Negative | Gray zone | Positive |
| Total, n (%) | 401 (100.0) | 286 (71.3) | 35 (8.7) | 80 (20.0) |
| After adjustment* (%) | 70.0 | 9.0 | 21.0 | |
| University hospitals, n (%) | 271 (67.6) | 207 (76.4) | 18 (6.6) | 46 (17.0) |
| Hospitals, n (%) | 92 (22.9) | 61 (66.3) | 10 (10.9) | 21 (22.8) |
| Others†, n (%) | 38 (9.5) | 18 (47.4) | 7 (18.4) | 13 (34.2) |
*Weight adjustment factor was based on the data of GADA tests performed in Korea from August 2018 to July 2021 obtained from Healthcare Bigdata Hub by Health Insurance Review & Assessment Service, Korea (available at: https://opendata.hira.or.kr/home.do, online supplemental table S1).
†Others include local clinics, referral clinical laboratories, armed forces hospitals, and public medical centers.