Novosibirsk City IDDM registry includes only children who lived at Novosibirsk City during the last year before the revealing of IDDM.

Novosibirsk area IDDM registry includes all children from Novosibirsk region without Novosibirsk City’s children.

Using method of capture-recapture we found out that completeness of IDDM revealing made up 95% for the primary source and 72% for the secondary source.