Helicobacter pylori incidence and re-infection in the Aklavik H. pylori Project

Figures & data

Fig. 1 Participation of the incidence/re-infection study among participants aged≥15 years.

Table I Frequency of new H. pylori infections among participants in the Aklavik H. pylori Project, Northwest Territories, Canada

					Incidence
	Tested, N	New cases	Person-years at risk	Mean (median)-years at risk	Proportion (%) 95% CI	Rate (% per year) 95% CI
Total	79*	5	239.3	3.0 (3.0)	(6.3) 2.1–14	(2.1) 0.7–4.9
Baseline-negative	36*	3	126.4	3.5 (3.8)	(8.3) 1.8–22	(2.4) 0.5–6.9
H. pylori-cleared	43	2	112.9	2.6 (2.8)	(4.7) 0.6–16	(1.8) 0.2–6.4
Male	32	1	94.8	3.0 (3.0)	(3.1) 0.1–16	(1.1) 0.3–4.7
Female	47	4	144.6	3.1 (2.8)	(8.5) 2.4–20	(2.7) 0.03–5.9
Age: 15–34 years	15	3	41.1	2.7 (2.8)	(20) 4.3–48	(7.3) 1.5–21.0
Age: 35–54 years	41	2	124.7	3.0 (3.0)	(4.9) 0.6–17	(1.6) 0.2–5.8
Age: 55 years and above	23	0	73.5	3.2 (3.0)	(0) 0–15^†	(0) 0–5.0^†
Inuvialuit^‡	41	4	121.5	3.0 (2.9)	(9.8) 2.7–33	(3.3) 0.9–8.4
Gwich'in^‡	23	1	68.3	3.0 (2.8)	(4.3) 0.1–22	(1.5) 0.04–8.2
Other Aboriginal^‡	2	0	7.6	3.5 (3.8)	(0) 0–84^†	(0) 0–49.0^†
Non-Aboriginal^‡	9	0	28.6	3.2 (3.2)	(0) 0–34^†	(0) 0–13.0^†

* Excludes 2 with uncertain results.

† One-sided, 97.5% confidence interval.

‡ Of 79 with classifiable results, excludes number of patients who declined to identify ethnicity.