Table 1.

Algorithm for the calculation of the Allred score [17,18].

Observed values	"Allocated" values for the calculation of the 0-8 Allred score
Percentage of positive cells
None	0
<1%	1
1% to 10%	2
10% to 33.3%	3
33.3% to66.7%	4
more than 66.7%	5
Intensity of staining
weak	1
intermediate	2
strong	3