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

Table 4

Overall positivity and intensity of various Immunoreactants according to different methods.

Immunoreactants	Method	Negative	+1	+2	+3	Total positive
IgG (n = 51)	IF-F	7	18	16	10	44 (86.2%)
	IF-P	10	17	20	4	41 (80.3%)
IgM (n = 51)	IF-F	40	10	1	0	11 (21.5%)
	IF-P	42	8	1	0	9 (17.6%)
IgA (n = 51)	IF-F	38	6	7	0	13 (25.4%)
	IF-P	40	7	4	0	11 (21.5%)
C3 (n = 51)	IF-F	27	16	7	1	24 (47%)
	IF-P	43	8	0	0	8 (15.6%)