Primary hyperparathyroidism: diagnostic value of a model of multivariate statistical analysis

In examining a group of 90 hypercalcaemic patients (37 with primary hyperparathyroidism), a comparison was made of the diagnostic reliability of: 1) tests commonly used for diagnosis of primary hyperparathyroidism; 2) radioimmunoassay of plasma parathormone; 3) a recently introduced model of multivariate statistical analysis. The results indicate that, at present, the model of multivariate statistical analysis used is of higher diagnostic reliability in the diagnosis of primary hyperparathyroidism than renal phosphate excretion tests and the radioimmunoassay of PTH itself.