Impact and Outcomes of Pretreatment Total Serum Testosterone on Localized Prostate Cancer Patients

Table 3

Predicted change over time relative to baseline testosterone level by treatment modality. The change was determined by linear regression modelling.

Therapy	Predicted change in testosterone level/year from baseline	95% confidence interval	value	R-squared	Statistical interpretation
Brachytherapy	0.17	−12.9 to 13.2	0.979	<0.001	No significant change
EBRT	4.8	−10.3 to 19.8	0.529	0.005	No significant change
EBRT + LDR	−13.2	−0.6 to 24.1	0.482	0.008	No significant change
Surgery	−20.5	−88.7 to 47.6	0.54	0.016	No significant change
All treatments combined	−0.0	−0.03 to 0.02	0.780	<0.001	No significant change