Inter-provider variation in resource use intensity for elderly injury admissions : a multicenter cohort study

Authors: Farhat, Imen
Advisor: Clément, Julien
Abstract: Elderly trauma admissions are increasing exponentially. However, little is known about resource use for this population. To advance knowledge on resource use and its optimization, our objectives were to identify resource use determinants, assess inter-hospital variation in resource use, and examine the impact of hospital resource use on patient outcomes for elderly injured patients. We conducted a multicenter cohort study of elders (≥65 years) with trauma (N=16,463) and with fragility fractures (N=16,721) admitted in the Québec trauma system (2013-2016). We estimated resource use with activity-based costing. We used intraclass correlation coefficients (ICC) to examine inter-hospital variation in resource use, multilevel linear models to identify determinants, and Pearson correlation coefficients (r) to assess the impact of resource use on patient outcomes. Resource use increased with age and the number of comorbidities for both groups. Patients discharged to long-term care had higher resource use than those discharged home (geometric mean ratio [GMR]=1.68; 95% CI [1.61, 1.75] for trauma and GMR=1.28; 95% CI [1.24, 1.32] for fragility fractures). Risk-adjusted resource use varied significantly across trauma centers for elderly patients. There was greater variation for elders with fragility fractures (ICC=0.093; 95% CI [0.079, 0.102]) than with trauma (ICC=0.047; 95% CI [0.035, 0.051]). Trauma centers with higher risk-adjusted resource use tended to have a higher incidence of mortality (r=0.41; 95% CI [0.16, 0.60]) for fragility fractures and complications for trauma (r=0.55; 95% CI [0.33, 0.71]) and for fragility (r=0.54; 95% CI [0.32, 0.70]). Our results suggest that there is room for resource use optimisation for elders admitted for injuries. The observed increase in mortality and morbidity in hospitals with higher resource use might be due to residual confounding but could also be due to adverse effects of potentially unnecessary interventions and hospitals stays. These hypotheses need to be confirmed in future studies.
Document Type: Mémoire de maîtrise
Issue Date: 2019
Open Access Date: 14 February 2020
Grantor: Université Laval
Collection:Thèses et mémoires

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