A comparison between manual and semiautomatic white cell differentiation.

: Manual and semiautomatic white cell differentiations have been found to produce comparable results. Semiautomatic counting can be accomplished with a smaller number of cells than required in manual counting without significant loss of accuracy. Cell types have been compared one by one to detect systematic deviations between the counting procedures. Complete differentials have been compared by means of a multivariate method called canonical correlation. The result of the canonical correlation is displayed graphically. Highly significant correlations have been found between 100-cell manual and 100-, 50-cell semiautomatic differentials.