Table 1.

Demographic characteristics and H. pylori status of participants at each visit, and anti-H. pylori therapy

Characteristics	Baseline n=800	6 years n=630	12 years n=612	16 years n=456	20 years n=356
Age in years, mean ± SD	51 ± 9	57 ± 8	62 ± 8	67 ± 8	69 ± 8
Males, n (%)	364 (46)	284 (45)	274 (45)	205 (45)	160 (45)
H. pylori positive, n (%)	776 (97)	345 (55)	322 (53)	201 (44)	146 (41)
Anti-H. pylori therapy†, n (%)	396 (50)	198 (31)	n/a	n/a	n/a

^†50% of individuals were randomized to receive eradication therapy at baseline and the other 50% were offered it at the end of the 6-year trial.

SD, standard deviation; n/a, not applicable.