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

Table 4 The association between the outcome of prostate biopsy and patient and prostate related factors, Hospital (2) sample

Variable	Prostate cancer detected			Prostate cancer not detected
	No of patients	Mean (SD)	%	No of patients	Mean (SD)	%	P-value
	N = 7			N = 16
Age	7	66.6 (5.2)		16	62.8 (6.7)		0.202
Prostate volume	7	35.0 (15.3)		16	49.8 (9.3)		0.025
PSA	7	15.9 (17.7)		16	7.9 (3.0)		0.189
Free/total PSA (%)	7	50.1 (26.3)		15	25.3 (19.9)		0.039
Velocity	7	4.3 (7.8)		16	0.8 (1.9)		0.256
DRE				16			0.457
1 (normal)	7		100.0	15		93.7
2 (abnormal)	0		0.0	1		6.3
Previous suspicious							0.907
Yes	1		14.3	2		12.5
No	6		85.7	14		87.5
Previous HGPIN							0.095
Yes	0		0.0	5		31.2
No	7		100.0	11		68.8

ISSN: 1471-2490