Table 2.

Cathepsin K immunohistochemical expression concerning the different histologic grades using Pearson chi-square test

Histologic grade	Cathepsin K		Total	Pearson Chi-Square Asymp. Sig. (2-sided)
	Negative or Weak expression	Moderate or Strong expression
Low grade carcinomas % within Histologic grade	12	0	12	.000
	100.0%	0.0%	100.0%
High grade carcinomas % within Histologic grade	4	29	33
	12.1%	87.9%	100.0%
Total % within Histologic grade	16	29	45
	35.6%	64.4%	100.0%

The mean difference is significant at the 0.05 level, Pearson Chi square test