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Comparative Study
Journal Article
Research Support, Non-U.S. Gov't
Off-pump coronary bypass provides reduced mortality and morbidity and equivalent 10-year survival.
Annals of Thoracic Surgery 2008 October
BACKGROUND: This study compared in-hospital major adverse cardiac events (MACE) and long-term survival after off-pump (OPCAB) vs on-pump (CPB) coronary artery bypass grafting (CABG).
METHODS: Reviewed were 12,812 consecutive isolated CABG patients from 1997 to 2006. A propensity score (PS), including 40 preoperative risk factors, balanced characteristics between OPCAB and CPB groups. Multiple logistic regression models tested whether gender or surgery type, or their interaction, were associated with in-hospital mortality and MACE. A proportional hazards regression model and Kaplan-Meier curves related long-term survival with gender, surgery type, and their interaction, adjusted for PS and age.
RESULTS: OPCAB was associated with a significant reduction in operative mortality (adjusted odds ratio [AOR], 0.68; p = 0.045), stroke (AOR, 0.48; p < 0.001), and MACE (AOR, 0.66; p = 0.018). Female gender was associated with higher rates of death (AOR, 1.93), stroke (AOR, 1.82), myocardial infarction (AOR, 2.19), and MACE (AOR, 1.97; each p < 0.001). Women disproportionately benefited from OPCAB in operative mortality (p = 0.04). Odds of death for women on CPB were higher than for women treated with OPCAB (AOR, 2.07, p = 0.005). Odds of death for men on CPB were not significantly higher than for men treated with OPCAB (AOR, 1.16, p = 0.51). Male gender was associated with longer-term survival (p = .011), but surgery type (OPCAB vs CPB) was not (p = 0.23).
CONCLUSIONS: OPCAB provides significant early mortality and morbidity advantages, especially for women. During the 10-year follow-up, OPCAB and CPB result in similar survival, regardless of gender.
METHODS: Reviewed were 12,812 consecutive isolated CABG patients from 1997 to 2006. A propensity score (PS), including 40 preoperative risk factors, balanced characteristics between OPCAB and CPB groups. Multiple logistic regression models tested whether gender or surgery type, or their interaction, were associated with in-hospital mortality and MACE. A proportional hazards regression model and Kaplan-Meier curves related long-term survival with gender, surgery type, and their interaction, adjusted for PS and age.
RESULTS: OPCAB was associated with a significant reduction in operative mortality (adjusted odds ratio [AOR], 0.68; p = 0.045), stroke (AOR, 0.48; p < 0.001), and MACE (AOR, 0.66; p = 0.018). Female gender was associated with higher rates of death (AOR, 1.93), stroke (AOR, 1.82), myocardial infarction (AOR, 2.19), and MACE (AOR, 1.97; each p < 0.001). Women disproportionately benefited from OPCAB in operative mortality (p = 0.04). Odds of death for women on CPB were higher than for women treated with OPCAB (AOR, 2.07, p = 0.005). Odds of death for men on CPB were not significantly higher than for men treated with OPCAB (AOR, 1.16, p = 0.51). Male gender was associated with longer-term survival (p = .011), but surgery type (OPCAB vs CPB) was not (p = 0.23).
CONCLUSIONS: OPCAB provides significant early mortality and morbidity advantages, especially for women. During the 10-year follow-up, OPCAB and CPB result in similar survival, regardless of gender.
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