Table 2.

Analysis for Serum Malondialdehyde (MDA) Levels According to Age of Patient and Tumor Advancement (Before and After Chemotherapy)

Characteristics		Level of Serum MDA (Mean ± SD)		p-value
		Before Chemotherapy	After Chemotherapy
Age group	< 20 Years	5.7937 ± 0.17655	4.3488 ± 0.08459	< 0.001
	40–60 Years	5.6020 ± 0.37797	4.5840 ± 0.26252	< 0.001
	60 Years	5.4663 ± 0.24727	4.5938 ± 0.22614	0.969
Tumor size	< 20 mm	±12,662	4.5233 ± 0.33858	0.045
	>20 mm	5.6617 ± 0.29951	4.5135±0.22534	< 0.001
Lymph node metastasis	Present	5.8350 ± 0.17113	4.3938±16,928	< 0.006
	Absent	5.4833± 0.32193	4.5683 ± 0.23976	0.007
Stage of tumor	Early stage	5.3600±0.1770	4.5233 ± 0.2471	0.007
	Advanced stage	5.840± 0.2021	4.5135±0.1667	< 0.001