Establishing a multivariate clinical laboratory data base

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Abstract
A regional or hospital-based “reference” value study is well within the range of every clinical laboratory. A program is described that samples one to two “health” subjects each working day under tightly controlled conditions. Sixty-seven variables are tested simultaneously to provide univariate age and sex ranges, and variance/covariance matrices from which associated correlation coefficients are obtained. This ongoing “reference” value program offers essential information for both univariate and multivariate interpretations along with validation and quality control for certain methods within the clinical laboratory.