Table 5

Assessment runs April 1994 to June 1998; differences in the distribution of marks for UK NEQAS and in house slides, measures of correlation between the two sets of scores, and details of the pass rates at each assessment

Distribution differences (E) and (F)Spearman's correlation (rs)Pass rate
Run no.Wilcoxon (Z)p ValuersSEp ValueNEQ (E)In house (F)
Pass rate refers to the proportion of participants achieving a score > 12 out of 20 (acceptable staining).
NEQ (E) refers to UK NEQAS slides circulated to each participating laboratory.
In house (F) refers to the participants own in house tumours.
26−0.189< 0.8500.4360.152< 0.00773%81%
29−3.612< 0.00010.3140.126< 0.01874%94%
32−5.705< 0.00010.4620.099< 0.000160%89%
34−4.962< 0.00010.4850.092< 0.000175%90%
36−7.333< 0.00010.3360.090< 0.000170%97%
38−7.990< 0.00010.2800.070< 0.000168%91%
39−6.464< 0.00010.3560.069< 0.000173%94%
40−10.705< 0.00010.3070.068< 0.000164%97%
41−10.345< 0.00010.3040.068< 0.000156%98%
42−10.769< 0.00010.3270.064< 0.000143%87%