Table 1. Frequency of positive islet cell antibodies and insulin autoantibodies in type 1 diabetes in Mexican-American patients and their first-degree relatives

Initial screen Type 1 diabetes Parents Siblings Control

ICA positive1 (40/108) 37% (8 /163) 5% (13 /197) 7% (1 /72) 1%
IAA positive NT2 (3 /75) 4% (5 /78) 6% (0 /50) 0%

1 Positive ICA results ranged from 5 to 320 JDF units.

2 NT, Not tested.