Table 1.

Demographic characteristics by case–control status (n, %)

	All (N = 3244)	Cases (N = 1447)	Controls (N = 1797)
Sex*
Female	1549 (47.75)	632 (43.68)	917 (51.03)
Male	1695 (52.25)	815 (56.32)	880 (48.97)
Age*
≤ 45 Years	367 (11.31)	131 (9.05)	236 (13.13)
45–55	931 (28.70)	421 (29.09)	510 (28.38)
56–65	1119 (34.49)	541 (37.39)	578 (32.16)
> 65	827 (25.49)	354 (24.46)	473 (26.32)
Smoke*
Never	1903 (58.68)	783 (54.11)	1120 (62.36)
Former	400 (12.33)	185 (12.79)	215 (11.97)
Current	940 (28.99)	479 (33.10)	461 (25.67)
H. pylori*
Negative	450 (13.87)	109 (7.53)	341 (18.98)
Positive	2794 (86.13)	1338 (92.47)	1456 (81.02)
Omp and HP0305 status*
Omp− and HP0305−	550 (16.95)	119 (8.22)	431 (23.98)
Omp + or HP0305+	863 (26.60)	356 (24.60)	507 (28.21)
Omp + and HP0305+	1831 (56.45)	972 (67.17)	859 (47.80)
VCA
< 25th percentile	821 (25.31)	371 (25.64)	450 (25.04)
25–75th percentile	1612 (49.69)	714 (49.34)	898 (49.97)
> 75th percentile	811 (25.00)	362 (25.02)	449 (24.99)
EBNA
< 25th percentile	842 (25.96)	393 (27.16)	449 (24.99)
25–75th percentile	1604 (49.45)	705 (48.72)	899 (50.02)
> 75th percentile	798 (24.60)	349 (24.12)	449 (24.99)
EA
< 25th percentile	821 (25.31)	372 (25.71)	449 (24.99)
25–75th percentile	1609 (49.60)	711 (49.14)	898 (49.97)
> 75th percentile	814 (25.09)	364 (25.16)	450 (25.04)
ZEBRA
< 25th percentile	855 (26.36)	406 (28.06)	449 (24.99)
25–75th percentile	1579 (48.67)	681 (47.06)	898 (49.97)
> 75th percentile	810 (24.97)	360 (24.88)	450 (25.04)

^*p ≤ 0.0001