Key result
Undergoing CABG at low-volume hospitals was associated with higher in-hospital mortality compared to high-volume hospitals (4.21% vs 3.54%; OR 1.26, 95% CI 1.15-1.39).
Why the study?
Does hospital CABG volume affect in-hospital mortality in patients undergoing CABG?
Population
228,738 patients who underwent coronary artery bypass graft surgery in 1998–2000 from the National Inpatient…
Comparison
CABG at low or medium-volume hospitals vs CABG at high-volume (≥500 cases/year) hospitals
Design
Cohort
Follow-up
in-hospital
Authors
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CABG mortality higher at low-volume hospitals; leaves open selective referral value given outcome heterogeneity and observational design.
Cohort (n=228,738)
Yes
Does hospital CABG volume affect in-hospital mortality in patients undergoing CABG?
Odds Ratio: 1.26 (95% CI 1.15–1.39)
Absolute Event Rate: 4.21% vs 3.54%
p-value: p=<0.001
While higher hospital CABG volume is associated with lower average in-hospital mortality, individual hospital volume is an unreliable marker of quality due to significant heterogeneity in outcomes.
Rathore et al. (2003) conducted a cohort in Coronary artery bypass graft (CABG) surgery (n=228,738). Low-volume hospital CABG (12-249 cases/year) vs. High-volume hospital CABG (≥500 cases/year) was evaluated on In-hospital mortality (OR 1.26, 95% CI 1.15-1.39, p=<0.001). Undergoing CABG at low-volume hospitals was associated with higher in-hospital mortality compared to high-volume hospitals (4.21% vs 3.54%; OR 1.26, 95% CI 1.15-1.39).
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