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J Diabetes Res. 2019 Sep 9;2019:3705264. doi: 10.1155/2019/3705264. eCollection 2019.

The Association between Helicobacter pylori Infection and Glycated Hemoglobin A in Diabetes: A Meta-Analysis.

Chen J1, Xing Y2, Zhao L2, Ma H1,3,4.

Author information

1
Department of Endocrinology, Hebei General Hospital, Shijiazhuang 050017, China.
2
Graduate School of Hebei Medical University, Shijiazhuang 050017, China.
3
Hebei Key Laboratory of Metabolic Diseases, Hebei General Hospital Shijiazhuang, Hebei 050051, China.
4
Department of Internal Medicine, Hebei Medical University, Shijiazhuang, Hebei 050017, China.

Abstract

Background:

The association between Helicobacter pylori infection and glycated hemoglobin A has been confirmed in many studies, but these conclusions are still contradictory and controversial. Therefore, we conducted a meta-analysis to resolve the problem of inconsistent results in diabetes.

Methods:

A comprehensive search was conducted on related researches published in PubMed, Embase, and China Academic Journal Full-text Database (CNKI) from the inception of each database to April 2019. Fixed or random effects model was used to pool the weighted mean difference with 95% confidence interval from individual studies. Subgroup and sensitivity analyses were also performed. Publication bias was estimated by funnel plot, Egger's test, and fail-safe numbers.

Results:

35 studies with 4,401 participants with diabetes were included in the meta-analysis. Glycated hemoglobin A levels were elevated in patients with Helicobacter pylori infection compared with patients without Helicobacter pylori infection (WMD = 0.50, 95% CI: 0.28-0.72, p < 0.001). In subgroup analysis by the subtype of diabetes, there was a correlation between Helicobacter pylori infection and elevated glycated hemoglobin A in type 1 diabetes (I 2 = 74%, p < 0.001, WMD = 0.46, 95% CI: 0.12-0.80), and in type 2 diabetes (I 2 = 90%, p < 0.001, WMD = 0.59, 95% CI: 0.28-0.90, p < 0.001). In subgroup analysis by the study design, there was a correlation in cross-sectional study (I 2 = 89%, p < 0.001, WMD = 0.42, 95% CI: 0.16-0.69, p ≤ 0.003) and in case-control study (I 2 = 83%, p < 0.001, WMD = 0.39, 95% CI: 0.14-0.64, p ≤ 0.003). By different methods for detecting Helicobacter pylori, there was a correlation in the biopsy group (I 2 = 83%, p < 0.001, WMD = 0.6, 95% CI: 0.11-1.09, p ≤ 0.03) and in other groups of test methods (I 2 = 87%, p < 0.001, WMD = 0.37, 95% CI: 0.17-0.56, p < 0.001). Sensitivity analysis showed that our results were reliable, and no evidence of substantial publication bias was detected.

Conclusion:

The meta-analysis might indicate a correlation between Helicobacter pylori infection and glycated hemoglobin A levels in diabetes.

Conflict of interest statement

The authors declare that they have no conflicts of interest.

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