m In the detection of color vision deficiencies, the focus is not only on the disturbed color axis, but also on the degree of disturbed color vision. Therefore, in order to find out the normal sum of errors, we evaluated this color test in a normal population. Methods: 95 subjects (m:f=71:24) without any ocular or general chronic disease were tested monocularly with tie desaturated Roth 26 HUE ...

A sequence of transforming functions is proposed to convert nongaussian distributions often seen in laboratory data to gaussian form. These transforms are chosen to eliminate or substantially reduce nongaussian characteristics of positive skewness and peakedness that result from two factors: (a) increases in variance with increasing mean values, and (b) general heterogeneity among intrapersonal...

Trimester specific reference ranges of hematological indices were described in several populations; however, comparable reports among Sudanese women with normal pregnancy are lacking. To evaluate trimester pattern of change and reference ranges of hematological profile among Sudanese women with normal pregnancy, we followed 143 women with singleton gestation since early pregnancy until the thir...

The determination of plasma fibrinogen, either as clottable protein or protein precipitable with glycine or ammonium sulfate, is evaluated in terms of principles of analysis, analytic error, normal and abnormal ranges, physiologic stability, and pathologic variability of fibrinogen concentration. The quantitative comparison of analytic error, population ranges, and individual variability should...