Early and medium-term results after on-pump and off-pump coronary artery surgery: a propensity score analysis

Boening, Andreas; Friedrich, Christine; Hedderich, J.; Schoettler, Jan; Fraund, S.; Cremer, Jochen

doi:10.1016/s0003-4975(03)01298-0

Cited by 37 publications

(25 citation statements)

References 28 publications

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“…Off-pump coronary artery bypass surgery nonsignificantly reduced infarction (OR 0.79; 95% CI 0.50 to 1.25). The number of observational studies reporting riskadjusted effects on infarction was six (49,53,55,59,61,63). These studies showed OPCAB to be associated with significantly reduced infarction rates (OR 0.66; 95% CI 0.50 to 0.88).…”

Section: Resultsmentioning

confidence: 99%

Off-Pump Coronary Artery Surgery for Reducing Mortality and Morbidity

Wijeysundera

Beattie

Djaiani

et al. 2005

Journal of the American College of Cardiology

264

157

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Randomized controlled trials did not find, aside from atrial fibrillation, the statistically significant reductions in short-term mortality and morbidity demonstrated by observational studies. These discrepancies might be due to differing patient-selection and study methodology. Future studies must focus on improving research methodology, recruiting high-risk patients, and collecting long-term data.

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Section: Resultsmentioning

confidence: 99%

Off-Pump Coronary Artery Surgery for Reducing Mortality and Morbidity

Wijeysundera

Beattie

Djaiani

et al. 2005

Journal of the American College of Cardiology

264

157

View full text Add to dashboard Cite

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“…observational studies [30][31][32][33] . Propensity matching allowed us to match each patient within the smaller UKA cohort with the patient in the TKA cohort who had the most similar patient characteristics (nearest available matching).…”

Section: Discussionmentioning

confidence: 99%

Differences in Short-Term Complications Between Unicompartmental and Total Knee Arthroplasty

Duchman

Gao

Pugely

et al. 2014

The Journal of Bone and Joint Surgery

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“…The remaining 800 unmatched, untreated subjects are apparently “wasted,” since they are not used in estimating the effect of treatment on outcomes. Several studies in the medical literature have used many-to-one ( M :1) matching on the propensity score (8–18). Using this approach, M ( M > 1) untreated subjects are matched to each treated subject.…”

mentioning

confidence: 99%

Statistical Criteria for Selecting the Optimal Number of Untreated Subjects Matched to Each Treated Subject When Using Many-to-One Matching on the Propensity Score

Austin

2010

American Journal of Epidemiology

513

388

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Propensity-score matching is increasingly being used to estimate the effects of treatments using observational data. In many-to-one (M:1) matching on the propensity score, M untreated subjects are matched to each treated subject using the propensity score. The authors used Monte Carlo simulations to examine the effect of the choice of M on the statistical performance of matched estimators. They considered matching 1–5 untreated subjects to each treated subject using both nearest-neighbor matching and caliper matching in 96 different scenarios. Increasing the number of untreated subjects matched to each treated subject tended to increase the bias in the estimated treatment effect; conversely, increasing the number of untreated subjects matched to each treated subject decreased the sampling variability of the estimated treatment effect. Using nearest-neighbor matching, the mean squared error of the estimated treatment effect was minimized in 67.7% of the scenarios when 1:1 matching was used. Using nearest-neighbor matching or caliper matching, the mean squared error was minimized in approximately 84% of the scenarios when, at most, 2 untreated subjects were matched to each treated subject. The authors recommend that, in most settings, researchers match either 1 or 2 untreated subjects to each treated subject when using propensity-score matching.

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Early and medium-term results after on-pump and off-pump coronary artery surgery: a propensity score analysis

Cited by 37 publications

References 28 publications

Off-Pump Coronary Artery Surgery for Reducing Mortality and Morbidity

Off-Pump Coronary Artery Surgery for Reducing Mortality and Morbidity

Differences in Short-Term Complications Between Unicompartmental and Total Knee Arthroplasty

Statistical Criteria for Selecting the Optimal Number of Untreated Subjects Matched to Each Treated Subject When Using Many-to-One Matching on the Propensity Score

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