Table 1. Components of tools by which to identify patients bearing insignificant PC.

		Prostate biopsy result
Reference	PSA (ng ml−1)	Number of positive cores	Core involvement	Clinical stage
Tosoian et al, 2011	Density ⩽0.15	⩽2	⩽50	T1
Adamy et al, 2011	⩽10	⩽3	⩽50	T1-2a
van den Bergh et al, 2009	⩽10 and density <0.2 ml−1	⩽2	—	T1c-2
Whitson et al, 2011	⩽10	⩽33% (of at least 6)	⩽50	T1c-2
Soloway et al, 2010	⩽15	⩽2	⩽50	T1c-2
D'Amico et al, 1998	⩽10	—	—	T1
Selvadurai et al, 2013	⩽15	—	⩽50	T1-2

Abbreviation: PC=prostate cancer.