41 Evaluating Immunization Status and Barriers to Immunization for Patients Admitted to the Stollery Children's Hospital

Abstract Introduction/Background Routine immunization is an effective public health intervention. Despite this, immunization coverage in Alberta remains below national targets. While vaccine hesitancy is a frequently cited barrier, underimmunization is likely multifactorial. Previous research has shown that hospitalization presents an opportunity to “catch-up” children who are underimmunized. Unfortunately, this is not readily available at the Stollery Children’s Hospital (SCH), a paediatric tertiary care facility serving a large catchment area. Objectives The primary objective of this study was to assess the immunization status of children admitted to paediatric clinical teaching units (CTUs) at SCH. Our secondary objective was to assess potential barriers caregivers face while attempting to immunize their children. Design/Methods Between July 2021 and October 2022, we prospectively gathered the immunization status of children aged 2 months to 18 years admitted to paediatric clinical teaching units (CTUs) at SCH. Two hundred and fifty children and their caregivers were enrolled in the research study. Demographic data and immunization records were documented, and immunization status of each participant was classified as up-to-date or not-up-to-date based on the Alberta Routine Childhood Immunization Schedule. Caregivers completed a standardized survey, Searching for Hardships and Obstacles to Shots (SHOTS), to assess potential barriers they face while attempting to immunize their children, including three subscales (access to shots, concerns about shots and importance of shots). Results Of the 250 children enrolled, immunization data was available for 240 children. Of these, 142 (59%) were up-to-date on their immunizations. Assessment of demographic data revealed no difference in immunization status between urban and rural addresses. When evaluating barriers that families face when approaching immunization, concerns about immunization were most commonly cited as barriers for all patients. However, caregivers whose children were not up-to-date on immunizations scored higher on all subscales compared to those whose children were up-to-date. Conclusion The immunization status of children admitted to paediatric CTUs at SCH falls far below national targets. Due to logistical issues, it is challenging to access routine immunizations during hospitalization. Caregivers of children who are underimmunized also identify a higher rate of barriers to immunization. These underimmunized patients represent a missed opportunity, and improving access to routine immunization while in hospital could improve the overall immunization rates for both hospitalized children and the broader community.