Abstract
<h3>Context:</h3> Information in primary care can be more actionable and guide planning if there is some population disaggregation based on differences in expected needs for care. Additionally, few studies have incorporated vulnerability into population segments, likely because of the complexity and evolving understanding of this construct, and because of the limits of routinely available data to measure it. <h3>Objective:</h3> To identify population segments, stratified by expected need for care, across three Canadian provinces (British Columbia-BC, Ontario-ON, Nova Scotia-NS) and report on variation in comparable primary care administrative data metrics by socioeconomic status (SES). <h3>Study Design and Analysis:</h3> Cross sectional study. We created four segments of the population: low need, multiple morbidities, medically complex, and frail using patient characteristics, physician and hospital billings, prescription medicines data, and emergency department visits within each province. We used descriptive statistics and rates to examine primary care performance where administrative data can be accurate. <h3>Dataset:</h3> Separate provincial administrative data (2013-2016): patient characteristics, physician billings, hospital billings and emergency department visits. <h3>Population Studied:</h3> adults (> 18 years) living in BC, ON, NS. <h3>Exposure:</h3> low/high SES within each segment. <h3>Outcome measures:</h3> % of pts (aged 65+) diagnosed with diabetes with Metformin as first hypoglycemic and emergency room visits for all. We also examined osteoporosis screening for those aged 65+ in BC and ON. <h3>Results:</h3> There were >1 million adults in each province who were eligible for health insurance during the study period. Regardless of SES status, NS had the highest emergency room visits for those in the multiple morbidity and medically complex segments compared to BC and ON. Compared to those in the high SES category within each segment, those in the low SES had a higher number of emergency room visits, those aged 65+ did not have Metformin as their first hypoglycemic if diagnosed with diabetes and were less likely to be screened for osteoporosis. More people in the low SES multiple morbidity, medically complex and frail segments are more likely to have 4 or more chronic conditions in all provinces. <h3>Conclusions:</h3> Four distinct population segments have potential utility for primary care performance measurement and reporting. Within each segment those with lower SES experienced health care disparities.
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