Table 5.

Initial characteristics of interval tumors and tumors detected within PEDBC

	True interval (%)	False negative (%)	Minimal signs (%)	Occult tumors (%)
Girona	54.5	13.6	13.6	18.2
Sabadell-Cerdanyola [15]	39.5	21.0	26.3	13.2
West Sussex [23]	54.3	33.6	-	12.1
Navarra [22]	57.7	12.3	15.0	15.0
Australia [20]	33.0	41.0	16.0	10.0
East Anglia [21]	66.2	17.2	5.4	11.3
Tarragona [25]	36.0	24.0	32.0	8.0
Barcelona [7]	52.3	20.0	6.2	21.5