Table 1.

Clinico-pathological characteristics and respective pre-operative serum CRP levels of 79 patients with high-grade osteosarcoma

Variable	N (%)	Mean pre-operative serum CRP level (SD)	p value (t-test)
Sex
Male	42 (53.2%)	0.42 (0.94)
Female	37 (46.8%)	0.66 (1.57)	0.417
Age
<40 years	74 (93.7%)	0.55 (1.31)
>40 years	5 (6.3%)	0.19 (0.27)	0.545
Post-operative infection
Yes	13 (16.5%)	0.25 (0.90)
No	66 (83.5%)	0.59 (1.33)	0.395
Histological response to chemotherapy
Yes	23 (29.1%)	0.37 (0.80)
No	56 (70.9%)	0.60 (1.42)	0.478
Tumor size
<10 cm	46 (58.2%)	0.50 (1.01)
>10 cm	33 (41.8%)	0.58 (1.59)	0.778
Histological subtype
Conventional	73 (92.4%)	0.38 (0.82)
Others	6 (7.6%)	2.40 (3.31)	<0.001
Metastatic disease
Yes	30 (38.0%)	0.81 (1.78)
No	49 (62.0%)	0.36 (0.80)	0.132
Death of Disease
Yes	22 (27.8%)	1.09 (2.02)
No	57 (72.2%)	0.32 (0.75)	0.015

CRP C-reactive protein, SD standard deviation