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Ten latex-fixation kits (both slide and tube) were evaluated by use of a reference serum containing 250 IU of rheumatoid factor (Communicable Disease Center). All tests were performed with serial dilution of serum; adjacent tubes differed by a factor of 0.10 log10. Geometric titers, means, standard deviations, and variance analysis were used to evaluate commercial kits. Three levels of variance were applied: (1) 0.18 or less for intralaboratory variation when the same serum is tested with the same kit; (2) 0.18-0.35 when various lots or batches of the same serum were used; (3) 1.0 or less when various commercial kits were tested with the same serum. The sensitivity of each commercial kit was determined by assigning to it a value (the minimum detectable unit) arrived at by dividing the number of units in the standard by the titer obtained. The technic presented could be applicable to other serologic tests, and thus provide a general method for their standardization and quality control.
J M Singer, and
S C Edberg, and
R L Markowitz, and
J D Glickman, and
L Miller, and
R Marchitelli
February 1969,
Journal of chronic diseases,
J M Singer, and
S C Edberg, and
R L Markowitz, and
J D Glickman, and
L Miller, and
R Marchitelli
December 1956,
The American journal of medicine,
J M Singer, and
S C Edberg, and
R L Markowitz, and
J D Glickman, and
L Miller, and
R Marchitelli
April 1975,
American journal of clinical pathology,
J M Singer, and
S C Edberg, and
R L Markowitz, and
J D Glickman, and
L Miller, and
R Marchitelli
July 1974,
American journal of clinical pathology,
J M Singer, and
S C Edberg, and
R L Markowitz, and
J D Glickman, and
L Miller, and
R Marchitelli
November 1973,
American journal of clinical pathology,
J M Singer, and
S C Edberg, and
R L Markowitz, and
J D Glickman, and
L Miller, and
R Marchitelli
January 1974,
Revista brasileira de pesquisas medicas e biologicas,
J M Singer, and
S C Edberg, and
R L Markowitz, and
J D Glickman, and
L Miller, and
R Marchitelli
October 1957,
Proceedings of the Society for Experimental Biology and Medicine. Society for Experimental Biology and Medicine (New York, N.Y.),
J M Singer, and
S C Edberg, and
R L Markowitz, and
J D Glickman, and
L Miller, and
R Marchitelli
April 1957,
Canadian Medical Association journal,
J M Singer, and
S C Edberg, and
R L Markowitz, and
J D Glickman, and
L Miller, and
R Marchitelli
February 1963,
Turk Tip Cemiyeti mecmuasi,
J M Singer, and
S C Edberg, and
R L Markowitz, and
J D Glickman, and
L Miller, and
R Marchitelli
November 1958,
Lancet (London, England),
