Adjustment for Other Prognostic Factors

For example, imagine a a study of  prognosis after MI where the authors did account for age and gender, but not left ventricular function.  One variable might plausibly account for all the predictive power of another. Thus look for an assessment of independent prognostic variables.  The mathematical techniques, while familiar in name to most readers, are generally advanced, computer based models which don't really need to be understood in fine detail.