Table 3. Prevalence of autoantibodies according to duration of type 1 diabetes.
| Positive/Total (%) | ||||||
|---|---|---|---|---|---|---|
| Duration (yr) | <1.0 | 1.0 – <3.0 | 3.0 – <6.0 | 6.0 – <9.0 | ≥9.0 | Pa |
| GADA | 413/569 (72.6) |
27/48 (56.2) |
36/67 (53.7) |
12/36 (33.3) |
9/30 (30.0) |
1.22 × 10–20 |
| IA2A | 418/569 (73.5) |
31/48 (64.5) |
24/67 (35.8) |
11/36 (30.6) |
6/30 (20.0) |
2.34 × 10–18 |
| GADA or IA2A | 509/569 (89.4) |
38/48 (79.2) |
44/67 (65.7) |
19/36 (52.8) |
11/30 (36.7) |
1.22 × 10–20 |
aχ2 test.
Abbreviations: GADA, Glutamic acid decarboxylase 65 autoantibody; IA2A, insulinoma-associated protein 2 autoantibody.