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Table 2 Previous studies investigating the impact of HP infection on sperm parameters

From: Sperm parameters and anti-Müllerian hormone remain stable with Helicobacter pylori infection: a cross-sectional study

Study

Public year

Country

HP (+ vs. −)

CagA (+ vs. −)

Results

Population

Conc

PR (%)

Population

Conc

PR (%)

Moretti [9]

2017

Italy

32 vs. 41

38.0 vs. 55.0*

17 .0 vs. 34.0***

20 vs. 12

33.4 vs. 42.5

10.5 vs. 22.5***

HP+ reduced conc. and PR

Moretti [17]

2015

Italy

28 vs.81

61 vs. 72

32 vs. 32

12 vs. 16

61 vs. 61.5

24 vs. 36.5*

CagA+ reduce PR

El-Garem [18]

2014

Egypt

NA

NA

NA

22 vs. 201

NA

NA

HP treatment improved PR

Moretti [16]

2013

Italy

NA

NA

NA

37 vs. 50

58 vs. 63

18 vs. 32**

CagA+ reduced PR

Moretti [7]

2012

Italy

27 vs. 51

94 vs. 72

32 vs. 30

11 vs. 16

65 vs. 94

24 vs. 38**

CagA+ reduced PR

Collodel [6]

2010

Italy

36 vs.44

24.5 vs. 23.5

22 vs. 28.5

17 vs. 19

25.5 vs. 23

18 vs. 29*

CagA+ reduced PR

  1. NA: not available; Conc.: sperm concentration; PR: progressive motility; CagA: cytotoxin-associated gene A
  2. *P < 0.05; **P < 0.01; ***P < 0.001