Age and total and free prostate-specific antigen levels for predicting prostate volume in patients with benign prostatic hyperplasia

Figures & data

Table 1. Correlations between age, TPSA, fPSA and prostate volume.

Correlation	Correlation coefficient	p Value
Age-TPSA	0.307	<0.001
Age-FPSA	0.382	<0.001
Age-PV	0.296	<0.001
TPSA-PV	0.410	<0.001
FPSA-PV	0.527	<0.001

TPSA, total prostate-specific antigen; FPSA, free prostate-specific antigen; PV, prostate volume.

Figure 1. ROC curves for total and free PSA to predict whether prostate volume is440 or540 ml.

Table 2. Area under curve estimates from receiver operating characteristic curves predicting prostate volüme >40 ml.

Variables	AUC	SE	p values	Asymptotic 95% CI
Total PSA	0.697	0.18	0.013	0.662–0.733
Free PSA	0.758	0.16	0.0001	0.727–0.789
Age	0.640	0.19	0.0001	0.603–0.677

SE, standard error; CI, confidence interval; PSA, prostate-specific antigen.