Karaceper, Maria DKhangura, Sara DWilson, KumananCoyle, DougBrownell, MarniDavies, ChristineDodds, LindaFeigenbaum, AnnetteFell, Deshayne BGrosse, Scott DGuttmann, AstridHawken, StevenHayeems, Robin ZKronick, Jonathan BLaberge, Anne-MarieLittle, JulianMhanni, AizeddinMitchell, John JNakhla, MerandaPotter, MurrayPrasad, ChitraRockman-Greenberg, CherylSparkes, RebeccaStockler, SylviaUeda, KeikoVallance, HilaryWilson, Brenda JChakraborty, PraneshPotter, Beth K2019-03-242019-03-242019-03-22Orphanet Journal of Rare Diseases. 2019 Mar 22;14(1):70http://hdl.handle.net/1880/110098https://doi.org/10.11575/PRISM/45111Abstract Background We describe early health services utilization for children diagnosed with medium-chain acyl-CoA dehydrogenase (MCAD) deficiency through newborn screening in Ontario, Canada, relative to a screen negative comparison cohort. Methods Eligible children were identified via newborn screening between April 1, 2006 and March 31, 2010. Age-stratified rates of physician encounters, emergency department (ED) visits and inpatient hospitalizations to March 31, 2012 were compared using incidence rate ratios (IRR) and incidence rate differences (IRD). We used negative binomial regression to adjust IRRs for sex, gestational age, birth weight, socioeconomic status and rural/urban residence. Results Throughout the first few years of life, children with MCAD deficiency (n = 40) experienced statistically significantly higher rates of physician encounters, ED visits, and hospital stays compared with the screen negative cohort. The highest rates of ED visits and hospitalizations in the MCAD deficiency cohort occurred from 6 months to 2 years of age (ED use: 2.1–2.5 visits per child per year; hospitalization: 0.5–0.6 visits per child per year), after which rates gradually declined. Conclusions This study confirms that young children with MCAD deficiency use health services more frequently than the general population throughout the first few years of life. Rates of service use in this population gradually diminish after 24 months of age.Journal Article2019-03-24enThe Author(s).https://doi.org/10.1186/s13023-019-1001-0