What question did this study set out to answer?

To identify early clinical predictors and evaluate multivariable discriminant models for assessing 30-day mortality and survival following acute myocardial infarction.

June 1, 1979CirculationOpen Access

Prognosis after acute myocardial infarction: a multivariate analysis of mortality and survival.

Q: What is the clinical evidence from this study?

Study design: Cohort. Population: Acute myocardial infarction (n=371). Intervention: Multivariate predictive model (discriminant function analysis). Primary outcome: Early mortality (within 30 days) and survival (beyond 30 days).

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Key result

A multivariate model combining 11 clinical and hemodynamic variables accurately identified 86% of early deaths and 96% of survivors (93% overall accuracy) after acute myocardial infarction.

Why the study?

Does a multivariate model combining clinical and hemodynamic variables accurately predict early mortality and survival in patients after acute myocardial infarction?

Population

371 patients after acute myocardial infarction (221 in initial series, 150 in validation series)

Design

Cohort

Follow-up

30 days and beyond

Authors

HHHartmut HenningNaval Medical Center San Diego EGE A GilpinNational Foundation for Cancer Research JCJ W CovellKirklees College

Discussion

Member takes

Implication

May refine post-AMI risk stratification; leaves open prospective validation before clinical use.

Key Points

To identify early clinical predictors and evaluate multivariable discriminant models for assessing 30-day mortality and survival following acute myocardial infarction.
Screened 158 admission variables in an initial cohort of 221 patients using stepwise discriminant function analysis with jackknife resampling to estimate 95% confidence intervals.
Validated the classification model in a subsequent series of 150 patients and in a combined cohort of 371 patients randomly split into derivation and validation subsets.
Combining patient history, physical examination, and noninvasive findings classified 70% of deaths (95% CI, 48–80%) and 94% of survivors (95% CI, 90–98%).
Incorporating 11 selected variables including hemodynamic data increased detection to 86% of deaths (95% CI, 66–98%) and 96% of survivors (95% CI, 92–100%), achieving 93% overall accuracy.
Validation across split samples confirmed that classification rates consistently fell within predicted 95% confidence intervals.

Study Design

Type

Cohort (n=371)

Structured PICO

Does a multivariate model combining clinical and hemodynamic variables accurately predict early mortality and survival in patients after acute myocardial infarction?

Population

371 patients after acute myocardial infarction (221 in initial series, 150 in validation series)

Intervention

Stepwise discriminant function analysis using clinical, noninvasive, and hemodynamic variables measured soon after admission

Outcome

Early mortality (within 30 days) and survival (beyond 30 days)hard clinical

A multivariate discriminant function analysis combining clinical and hemodynamic variables provides a reliable approach for predicting early death or survival after acute myocardial infarction.

Limitations

The number of patients studied hemodynamically in the validation series was unrepresentative and too small to allow overall predictive accuracy.

Cite This Study

Henning et al. (1979) conducted a cohort in Acute myocardial infarction (n=371). Multivariate predictive model (discriminant function analysis) was evaluated on Early mortality (within 30 days) and survival (beyond 30 days). A multivariate model combining 11 clinical and hemodynamic variables accurately identified 86% of early deaths and 96% of survivors (93% overall accuracy) after acute myocardial infarction.

synapsesocial.com/papers/6a11fed10514fa642cccda2f https://doi.org/10.1161/01.cir.59.6.1124

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Prognosis after acute myocardial infarction: a multivariate analysis of mortality and survival.

Discussion

Member takes

Implication

Key Points

Study Design

Structured PICO

Limitations

Cite This Study

Prognosis after acute myocardial infarction: a multivariate analysis of mortality and survival.

Discussion

Member takes

Implication

Key Points

Study Design

Structured PICO

Limitations

Cite This Study

Also Consider

Also Consider