| Follow up period | No. of patients | Mean no. of H. pylori test | No. of reinfected patients | Patient-years (yr) | Annual reinfection rate (%) |
---|---|---|---|---|---|---|
 | 1 ≤ year <2 | 23 | 1.39 | 3 | 33.08 | 9.07 |
E | 2 ≤ year <3 | 18 | 2.22 | 3 | 42.25 | 7.10 |
B | 3 ≤ year <4 | 5 | 2.00 | 0 | 16.58 | 0 |
M | 4 ≤ year <5 | 8 | 2.63 | 0 | 34.67 | 0 |
T | 5 ≤ year <6 | 3 | 6.00 | 1 | 16.58 | 6.03 |
 | 6 ≤ year <7 | 1 | 5.00 | 0 | 6.5 | 0 |
7 ≤ year <8 | 1 | 5.00 | 0 | 7.5 | 0 | |
Total | 59 | 2.05 | 7 | 157.17 | 4.45 | |
 | 1 ≤ year <2 | 39 | 1.36 | 8 | 54.12 | 14.78 |
M | 2 ≤ year <3 | 37 | 2.05 | 8 | 91.75 | 8.72 |
E | 3 ≤ year <4 | 30 | 3.67 | 1 | 104.58 | 0.96 |
A | 4 ≤ year <5 | 10 | 3.80 | 2 | 43.33 | 4.62 |
 | Total | 116 | 2.31 | 19 | 294.08 | 6.46 |