Artificial neural network(ANN) approach was applied to classification
of normal persons and lung cancer patients based on the metal content
of hair and serum samples obtained by inductively coupled plasma atomi
c emission spectrometry (ICP-AES) for the two groups. This method was
verified with independent prediction samples and can be used as an aid
ing means of the diagnosis of lung cancer. The case of predictive clas
sification with one element missing in the prediction samples was stud
ied in details, The significance of elements in hair and serum samples
for classification prediction was also investigated.