Table 1. Summary of clinicopathologic data and ABC immunostaining in osteosarcoma tumor tissue microarray.

	Total	ABC positive nuclear staining			ABC negative nuclear staining	P value
Total	40	34 (85%)			6 (15%)
Gender
Male	27	22 (81.5%)			5 (18.5%)	0.64a
Female	13	12 (92.3%)			1 (7.7%)
Mean Age (years)		28.91			44.67	0.01b
Scores/Tumor Stage		1+	2+	3+	0
IA	2	1	0	0	1	0.04c
IB	3	1	1	0	1
IIA	9	6	0	1	2
IIB	26	21	2	1	2

Table summarizes that there is significant correlation between positive ABC nuclear staining intensity and age of patient and tumor stage. There is no correlation between positive ABC nuclear staining intensity and gender. Statistical analysis for gender, age, and tumor stage was done using unpaired student's t-test, non-parametric Mann-Whitney test and Kruskal-Wallis trend test respectively; P < 0.05.

^aIndicates the P value for nuclear ABC staining in males vs females.

^bIndicates the P value for difference between mean ages of patients in positive and negative ABC staining groups.

^cIndicates the P value for nuclear ABC staining across different stages of OS tumor (IA, IB, IIA & IIB).