Table 1.
Seropositivity for Helicobacter pylori strains affected by age, sex and area n (%)
| n | H. pylori infection rate |
H. pylori strains |
||
| I | II | |||
| Sex | ||||
| Male | 1005 | 851 (84.7) | 578 (57.5) | 273 (27.2) |
| Female | 1001 | 822 (82.1) | 546 (54.5) | 276 (27.6) |
| Age | ||||
| < 75 yr | 1368 | 1140 (83.3) | 792 (57.9) | 348 (25.4) |
| ≥ 75 yr | 638 | 533 (83.5) | 332 (52.0)a | 201 (31.5)b |
| Area | ||||
| Mountainous (huairou) | 518 | 472 (91.1) | 258 (49.8) | 214 (41.3) |
| Suburban (daxing) | 522 | 403 (77.2)d | 303 (58)d | 100 (19.2)d |
| Urban (xuanwu) | 966 | 798 (82.6)d | 563 (58.3)d | 235 (24.3)d |
| Total | 2006 | 1673 (83.4) | 1124 (56) | 549 (27.4) |
a
P < 0.05,
b
P < 0.01 vs young-old persons.
d
P < 0.01 vs among urban, suburban and mountainous areas. H. pylori: Helicobacter pylori.