Oxidative Stress Markers in Prostate Cancer Patients after HDR Brachytherapy Combined with External Beam Radiation

Table 3

Statistically significant correlation coefficients between measured parameters.

Group	Parameters	𝑟
Control
	CAT/TBARSplasma	−0.37*
	CAT/TBARSeryth.	0.39*
	SOD/GPx	0.44*
	SOD/TBARSeryth.	0.37*
	GPx/TBARSeryth.	0.49**
Patients
Before therapy	SOD/TBARSplasma	0.39**
	GPx/TBARSeryth.	−0.30*
	TNM/TBARSeryth.	-0.30*
	Gleason score/GPx	0.27*
	Age/ASA class	0.27*
	Gleason score/TBARSeryth.	−0.33*
	Hb/TBARSeryth.	−0.31*
	Leukocyte count/TBARSeryth.	−0.32*
Immediately after radiotherapy	SOD/TBARSeryth.	0.45**
1.5–3 months after	CAT/TBARSplasma	−0.37*
2 years after radiotherapy	CAT/TBARSplasma	−0.67*

^*𝑃<0.05; ^**𝑃<0.01.
SOD: superoxide dismutase; CAT: catalase; GPx: glutathione peroxidase; TBARSs: thiobarbituric acid reactive substances, ASA: American Society of Anesthesiologists score.