Diagnostic Accuracy of Direct Immunofluorescence Test on Paraffin-Embedded Blocks in Comparison with Frozen Section Blocks in Renal Biopsies

Table 5

Sensitivity and Specificity for IgG, IgA, IgM, and C3 by IF-P method.

IF-F/IF-P	a (+/+)	b (−/+)	c (±)	d (−/−)	No of case	Sensitivity a/(a+c)	Specificity d/(d + b)
IgG	41	0	3	7	51	93.1%	100%
IgA	10	1	3	37	51	76.9%	97.3%
IgM	7	2	4	38	51	63.6%	95%
C3	8	0	16	27	51	33.3%	100%