Cystic fibrosis: the prognosis for five-year survival.

Statistical discriminant analysis is applied to 41 concomitant variables obtained during the 
first year of study of 226 patients with cystic fibrosis. A 
discriminant function based on six variables is developed which can be 
used as a predictive index. This index estimates the probability of 
5-year survival for an individual patient and can also be used 
to classify patients into one of two groups: (1) will live 
for 5 years or (2) will die within 5 years. Speculation 
A classification rule for cystic fibrosis is presented which correctly assigns 
90% of the 5-year survivors and 84% of those who expire. 
Such a classification scheme is useful for clinical and research purposes. 
