Seroepidemiology of Helicobacter pylori infection in elderly people in the Beijing region, China

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)

^aP < 0.05,

^bP < 0.01 vs young-old persons.

^dP < 0.01 vs among urban, suburban and mountainous areas. H. pylori: Helicobacter pylori.

Table 2 Seropositivity of Helicobacter pylori strains affected by age

Age (yr)	n	H. pylori infection rate
		H. pylori cases	%
60-64	395	343	86.8
65-69	497	389	78.3
70-74	476	408	85.7
75-79	384	322	83.9
≥ 80	254	211	83.1
Total	2006	1673	83.4

H. pylori: Helicobacter pylori.

Table 3 Prevalence of Helicobacter pylori strains affected by previous occupation n (%)

	n	H. pylori infection rate	H. pylori strains
			I	II
Mental work	647	514 (79.5)	351 (54.3)	163 (25.2)
Manual work	928	788 (84.9)b	519 (55.9)	269 (29.0)
Total	1575	1302 (82.7)	870 (55.2)	432 (27.4)

^bP < 0.01 vs mental workers in the total Helicobacter pylori infection rate. H. pylori: Helicobacter pylori.

Table 4 Helicobacter pylori infection rate affected by diets n (%)

	n	H. pylori infection rate	H. pylori strains
			I	II
Vegetarian diet	593	524 (88.4)	345 (58.2)	179 (30.2)
High-protein diet	1413	1149 (81.3)b	779 (55.1)b	370 (26.2)
Total	2006	1673 (83.4)	1124 (56)	549 (27.4)

^bP < 0.01 vs elderly persons on a vegetarian diet. H. pylori: Helicobacter pylori.