503 - Disparities in Health Outcomes by the Age of Five Among Preterm Children in Rural Versus Urban Communities in British Columbia

Poster Number: 503
Publication Number: 503.1249

Background: Health disparities exist between than urban and rural communities, as rates of preterm birth, severe maternal morbidity and severe neonatal morbidity are higher in rural areas. There are limited population-based studies on early childhood health outcomes among those born preterm by geographical area.

Objective: To compare health service use, morbidity, and medication use for up to five years of age between preterm children in rural versus urban residences.

Design/Methods: The study included liveborn infants at 22-44 weeks’ gestational age (GA) in British Columbia (BC), Canada, 2004-2014. Follow-up data to December 2019 included linked health information from four provincial databases (perinatal database, outpatient visits, hospitalizations, and outpatient prescriptions). Urban-rural status was based on maternal residence at birth. Rate ratios (RR) of health service use, childhood morbidity and medication use were compared within GA categories (22-27, 28-33, 34-36, 37-44) by rural vs. urban region using Poisson regression.

Results: There were 49,555 (10.9%) rural and 406,149 (89.1%) urban children included in this study. 42,789 children were born at < 37 weeks GA, and the preterm birth rate was 9.4%. Compared to urban areas, children in rural regions had more hospitalizations (28-33 weeks: RR 1.35, 95% CI: 1.19-1.51; 34-36 weeks: RR 1.35, 95% CI 1.27-1.44; 37-44 weeks: RR 1.32, 95% CI 1.29-1.34) by five years of age; and significantly fewer outpatient visits (22-27 weeks: RR 0.90, 95% CI: 0.87-0.93; 28-33 weeks: RR 0.81, 95% CI: 0.80-0.82; 34-36 weeks: RR 0.75, 95% CI 0.74-0.75; 37-44 weeks: RR 0.71, 95% CI 0.71-0.71; Table 1). Rural children born at 34-36 weeks had significantly higher rates of bronchiolitis (RR: 1.35, 95% CI: 1.16-1.56) compared to urban children. They were prescribed more antibiotics and bronchodilators (RR: 1.15, 95% CI: 1.13-1.17, and RR: 1.12, 95% CI: 1.05-1.19, respectively).

Conclusion(s): Compared with urban areas, preterm children living in rural regions of BC had higher rates of hospitalization, higher rates of bronchiolitis and more frequent prescriptions of antibiotics and bronchodilators by five years of age. These disparities in health status and service use warrant further research and public health interventions.