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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 changeTotalnumber 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 deviant11 (35.5%)6 (60.0%)5 (23.8%)0.147**
 More deviant12 (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 deviant18 (58.1%)6 (60.0%)12 (57.1%)0.732**
 More deviant11 (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 deviant17 (54.8%)6 (60.0%)11 (52.4%)0.328**
 More deviant11 (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