Development and validation of risk score for predicting positive repeat prostate biopsy in patients with a previous negative biopsy in a UK population

Table 1 B Repeat prostate biopsy outcome and patient and prostate related factors, Hospital (1) sample

Variable	Prostate cancer detected			Prostate cancer not detected
	No of patients	Mean (SD)	%	No of patients	Mean (SD)	%	P-value
	N = 27			N = 59
Mean Age (years)	27	66.7 (7.8)		59	65.2 (7.5)		0.411
Prostate volume (ml)	22	51.1(27.3)		59	61.1 (24.5)		0.097
PSA (ng/ml)	27	12.4 (7.0)		59	11.7 (9.7)		0.735
Free-to-total PSA (%)	24	13.8 (7.4)		56	16.9 (8.4)		0.131
Velocity (ng/ml/year)	21	3.3 (3.2)		43	-0.8 (7.7)		0.023
DRE							0.443
1 (normal)	20		74.1	48		81.4
2 (abnormal)	7		25.9	11		18.6
Previous suspicious							0.867
Yes	2		7.4	5		8.5
No	25		92.6	54		91.5
Previous HGPIN							0.777
Yes	10		37.0	20		33.9
No	17		63.0	39		66.1

SD – standard deviation
P-value derived from logistic regression model
DRE 1 refers to a palpably normal gland, DRE 2 to a abnormal digital rectal examination

ISSN: 1471-2490