60 endogenous depressive patients (DSM III: 296.2x, 3x, 296.5x) were studied according to the following diagnostic techniques: DST (Carroll's standardization), Phenyl-ethyl-amine (PEA) urinary quantification (Spatz's technique) and 3-Methoxy-4-Hydroxyphenylethyl Glycol (MHPG) urinary quantification (Bigelow's technique). Seven groups were thus obtained according to their being positive in, at least, one of those determinations. The above mentioned techniques allow the finest of discriminations since 5% of the patients only kept undetected. The critical path analysis to this conclusion is discussed.
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