Table 1.

Current status of the PRISMA study (initiation April 1998)

Endoscopy-histologically screened men between 55 and 65 years of age	Cases (n = 1526)	%
Presence of histological inclusion criteria	n = 279	18.3
Patients randomized	n = 167	58.8a
Non-randomized patients continuing follow-up	n = 109	39.1a
Patients with study endpoints	3	1.8b
Cumulative follow-up (months/years)	3046/253.8

^aPercentage of those who meet all inclusion criteria

^bPercentage of all randomized patients.