Unplanned index hospital admissions among new older high-cost health care users in Ontario: a population-based matched cohort study

Background:

Most health care spending is concentrated within a small group of high-cost health care users. To inform health policies, we examined the characteristics of index hospital admissions and their predictors among incident older high-cost users compared to older non–high-cost users in Ontario.

Methods:

Using Ontario administrative data, we identified incident high-cost users aged 66 years or more and matched them 1:3 on...