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Table 2 Type of change in the laboratories after feedback per histologic grade

From: Grading variation in 2,934 patients with ductal carcinoma in situ of the breast: the effect of laboratory- and pathologist-specific feedback reports

Type of change

Totalnumber of laboratories (n = 31)

Laboratories with feedback on pathologist’ level (n = 10)

Laboratories without feedback on pathologist’ level (n = 21)

p-value

Grade I

No shift (≤2%)

8 (25.8%)

1 (10.0%)

7 (33.3%)

0.165*

Shift(> 2%)

 Less deviant

11 (35.5%)

6 (60.0%)

5 (23.8%)

0.147**

 More deviant

12 (38.7%)

3 (30.0%)

9 (42.9%)

 

Grade II

No shift (≤2%)

2 (6.5%)

1 (10.0%)

1 (4.8%)

0.579*

Shift (> 2%)

 Less deviant

18 (58.1%)

6 (60.0%)

12 (57.1%)

0.732**

 More deviant

11 (35.5%)

3 (30.0%)

8 (38.1%)

 

Grade III

No shift (≤2%)

3 (9.7%)

2 (20.0%)

1 (4.8%)

0.180*

Shift (> 2%)

 Less deviant

17 (54.8%)

6 (60.0%)

11 (52.4%)

0.328**

 More deviant

11 (35.5%)

2 (20.0%)

9 (42.9%)

 
  1. * p-value for shift vs. no shift between laboratories with and without feedback on pathologist’ level
  2. ** p-value for type of change when laboratories shifted > 2% after feedback between laboratories with and without feedback on pathologist’ level