Table 4 Impact of previous infections on G. duodenalis infection at the end of the trial

No infection at previous time points

1082

8.5 (7.0–10.3)

reference

Infection at one previous time point

254

26.3 (21.3–32.1)

2.05

1.47–2.86

< 0.001

Infection at two previous time points

90

53.3 (43.0–63.3)

3.81

2.62–5.56

< 0.001

Infection at three previous time points

26

53.8 (35.0–71.6)

3.88

2.13–7.07

< 0.001

Infection at four previous time points

12

66.7 (37.6–86.9)

5.55

2.55–12.10

< 0.001