TABLE 1.

Studies comparing intensive with less intensive follow-up

Studies	Year	No	CEA testing	Liver imaging	5-y OS IFU (less IFU)	P value
Makela17	1995	106	Yes	Yes	59 (54)	0.26
Ohlsson18	1995	107	Yes	No	75 (67)	0.50
Kjeldsen19	1997	597	No	No	68 (70)	0.48
Schoemaler20	1998	325	No	Yes	76 (70)	0.20
Pietra21	1998	207	Yes	Yes	73 (58)	0.02
Secco22	2002	358	Yes	Yes	62 (43)	<0.05

Abbreviations: No = number of patients; OS = overall survival; IFU = intensive follow-up