Skip to main content

Table 1 Characteristics of selected studies for oipA gene on/off and presence/absence status analysis

From: Association of presence/absence and on/off patterns of Helicobacter pylori oipA gene with peptic ulcer disease and gastric cancer risks: a meta-analysis

Author

Ethnicity

Year

Region

gastritis or FD

PUD

GU

DU

GC

oipA+/total (%)d

oipA+/tota (%)d

oipA+/total (%)d

oipA+/total cases (%)d

oipA+/total cases (%)d

For oipA functional status (on/off) studies

Markovska, R.

Bulgarian

2011

Europe

23/35(65.7%)

33/34(97.1%)

/

/

/

Oleastro, M.

Portuguese

2010

Europe

18/60(30.0%)

40/57(70.2%)

/

/

/

Schmidt, H. M.

Chinese

2010

Asia

45/52(86.5%)

14/16(87.5%)

/

14/16(87.5%)

19/22(86.4%)

Chiarini, A.

Italian

2009

Europe

17/21(81.0%)

7/10(70.0%)

/

/

/

LI, N.

Chinese

2009

Asia

66/86(76.7%)

12/12(100.0%)

12/12(100.0%)

/

2/2(100.0%)

Oleastro, M.

Portuguesea

2008

Europe

28/56(50.0%)

34/50(68.0%)

/

/

/

Portugueseb

2008

Europe

17/53(32.1%)

26/31(83.9%)

/

/

/

Yamaoka, Y.

Colombian

2006

America

24/40(60.0%)

36/40(90.0%)

/

36/40(90.0%)

36/40(90.0%)

American

2006

America

25/40(62.5%)

34/40(85.0%)

/

34/40(85.0%)

/

de Jonge, R.

Dutch

2004

Europe

18/29(62.1%)

39/49(79.6%)

16/21(76.2%)

23/28(82.1%)

8/9(88.9%)

Zambon, C. F.

Itilian

2003

Europe

15/31(48.4%)

14/19(73.7%)

/

/

/

Yamaoka, Y.

American

2002

America

25/40(62.5%)

37/41(90.2%)

/

37/41(90.2%)

20/30(66.7%)

Colombian

2002

America

26/40(65.0%)

36/40(90.0%)

/

36/40(90.0%)

34/41(82.9%)

Yamaoka, Y.

Japanese

2000

Asia

40/40(100.0%)

40/40(100.0%)

/

40/40(100.0%)

/

For oipA gene (presence/absence) studies

Ji, C. W.

Chinese

2011

Asia

26/46(56.5%)

45/58(77.6%)

45/58(77.6%)

/

33/43(76.7%)

Ben, M. K.

Tunisian

2010

Africa

186/195(95.4%)

63/78(80.8%)

/

/

/

Xie, J.

Chinese

2010

Asia

16/51(31.4%)

12/39(30.8%)

6/19(31.6%)

6/20(30.0%)

19/27(70.4%)

Dabiri, H.

Persians

2009

Asia

36/57(63.2%)

2/13(15.4%)

/

/

0/4(0.0%)

Turkish

2009

Asia

7/21(33.3%)

3/5(60.0%)

/

/

1/7(14.3%)

Kurds, etc.c

2009

Asia

8/13(61.5%)

4/4(100.0%)

/

/

/

Zhou, M.

Chinese

2009

Asia

21/40(52.5%)

37/40(92.5%)

/

37/40(92.5%)

18/20(90.0%)

Salih, B. A.

Turkish

2007

Asia

17/21(81.0%)

13/14(92.9%)

/

/

/

Zhang, J.

Chinese

2004

Asia

11/42(26.2%)

16/16(100.0%)

16/16(100.0%)

/

/

  1. a, for adult study population; b, for children study population; c, Kurds, Lurs, Afghanis, Arabs; d, for oipA gene presence/absence studies, oipA(+) means oipA gene positive, while for oipA functional status on/off studies, oipA(+) means oipA gene “on” status.
  2. Abbreviations: FD functional dyspepsia, PUD peptic ulcer disease, GU gastric ulcer, DU duodenal ulcer, GC gastric cancer.