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Table 1 Questionnaire results from the 41 participant centres

From: External quality assessment (EQA) program for the immunohistochemical detection of ER, PR and Ki-67 in breast cancer: results of an interlaboratory reproducibility ring study in China

 

ER, N (%)

 

PR, N (%)

 

Ki-67, N (%)

Immunostaining procedure

 Automated

34 (82.9)

 

34 (82.9)

 

34 (82.9)

 Manual

7 (17.1)

 

7 (17.1)

 

7 (17.1)

Type of antibody

 SP1(Ventana)

26 (63.4)

1E2(Ventana)

19 (46.3)

30–9(Ventana)

12 (29.3)

 EP1(Dako)

10 (24.4)

EP2(BIO-SB)

9 (22.0)

MIB-1(Maxim)

14 (34.1)

 6F11(Leica)

2 (4.9)

PgR36(Dako)

4 (9.7)

UMAB107(Origene)

7 (17.1)

 others

3 (7.3)

others

9 (22.0)

others

8 (19.5)

Antigen retrieval

 Automated

33 (80.5)

 

33 (80.5)

 

33 (80.5)

 Pressure cookers

8 (19.5)

 

8 (19.5)

 

8 (19.5)

Chromogen

 DAB

41 (100)

 

41 (100)

 

41 (100)

Evaluation

 Pathologist

41 (100)

 

41 (100)

 

41 (100)

Artificial intelligence

0

 

0

 

0