_______ 7 SAŽETAK Uvod/cilj: Dijabetesna ketoacidoza (DKA) je najznačajniji uzrok mortaliteta mladih sa tipom 1 dijabetesa melitusa (T1DM). Rezultati poslednjih istraživanja ukazuju na zabrinjavajuće visoku prevalenciju DKA u trenutku postavljanja dijagnoze T1DM kod mladih u Beogradu. Cilj ovog istraživanja bila je procena učestalosti DKA kod dece i adolescenata sa novootkrivenim T1DM tokom desetogodišnjeg perioda u tercijernom centru u Beogradu. Metode: Podaci su prikupljeni retrospektivnom pretragom medicinske dokumentacije sve dece i adolescenata sa novootkrivenim T1DM koji su bili hospitalizovani u našem centru tokom perioda od 1. januara 2007. godine do 1. januara 2017. godine. Rezultati: Dijagnoza novootkrivenog T1DM postavljena je kod ukupno 501 deteta (233 devojčice i 268 dečaka) prosečnog uzrasta 9,55 ± 4,26 godina, sa prosečnom vrednošću pH od 7,28 ± 0,14 (6,78-7,51) u trenutku postavljanja dijagnoze. Devojčice sa T1DM su u proseku bile mlađe u odnosu na dečake (9,05 ± 4,04 god. u odnosu na 9,98 ± 4,41 god, respektivno, p<0.05). Od ukupnog broja pacijenata, 191 (38,1%) je u trenutku postavljanja dijagnoze imao DKA, od čega je 47.6% bilo u blagoj, 26,2% u umerenoj, a 26,2% u teškoj ketoacidozi. U grupi mlađe dece, uočena je veća učestalost DKA (40%) u odnosu na grupu dece uzrasta > 11 godina (35%), ali ova razlika nije bila statistički značajna. Zaključak: Rezultati ukazuju na zabrinjavajuće visoku prevalenciju DKA u trenutku postavljanja dijagnoze T1DM kod mladih u Beogradu, bez značajne razlike u odnosu na uzrast. Ovi nalazi ukazuju na potrebu SUMMARY Introduction/Aim: Diabetic ketoacidosis (DKA) is one of the most important causes of acute mortality in youth with type 1 diabetes mellitus (T1DM). Recently published data suggested worryingly high frequency of DKA at the onset of T1DM in Belgrade youth. The goal of this study was to assess the frequency of DKA at the onset of T1DM and the associated risk factors in Belgrade youth during the previous 10 years at a tertiary centre. Methods: Data were collected retrospectively from the medical records of all children with new-onset T1DM admitted to our centre during the study period between 1st January 2007 and 1st January 2017. Results: During the study period, a total of 501 subjects (233 girls and 268 boys) were diagnosed with new-onset T1DM, with a mean age of 9.55 ± 4.26 years, and mean pH at the time of diagnosis of 7.28 ± 0.14 (6.78-7.51). Girls with T1DM were younger compared to boys (9.05 ± 4.04 years vs. 9.98 ± 4.41 years, respectively, p < 0.05). Of all patients, 191 (38.1%) presented with DKA, 47.6% of which were classified as mild, 26.2% as moderate and 26.2% as severe DKA. Slightly higher frequency of DKA was noticed in the younger age groups (40%) compared to the children > 11 years (35%), although this difference was not statistically significant. Conclusion: There is an alarmingly high rate of DKA at the onset of T1DM in Belgrade youth with no significant differences between different age groups. These findings emphasize the need for intens...