The final sample was narrowed down to 88 newborns out of 9383 live births in Iceland in that period, 7 medical records could not be processed further and were consequently omitted.
Sjö sjúkraskrár fundust ekki í tæka tíð og voru því ekki teknar með. Endanlegt úrtak var því 88 nýburar af 9383 lifandi fæddum börnum á Íslandi á þessu tímabili.