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Objective: Colorectal cancer (CRC) is a commonly diagnosed cancer. Previous studies investigating the relationship between periodontal disease (PD) and CRC showed controversial conclusions. This meta‐analysis is to explore the association between PD and CRC. Methods: Observational studies that explore the association between CRC and PD were included in this meta‐analysis. A comprehensive literature search in 7 electronic databases to identify all relevant studies published prior to February 2020. The Newcastle‐Ottawa Quality Assessment Scale was used to evaluate the quality each study. The pooled relative risk (RR) and 95% confidence interval (CI) were used to estimate the association between the PD and CRC risk. Results: A total of 838 articles were obtained from database searching and 4 articles were obtained from other sources, and 13 articles with 14 studies involving 634,744 participants were included. An association between PD and increased CRC incidence was found, periodontal disease patients were 21% (95%CI, [1.06, 1.38], I2=83.9%) more likely to develop colorectal cancer than people with healthy oral cavity. But there is no significant association between PD and CRC mortality. The heterogeneity of this meta‐analysis was relatively high, I2 was 83.9% (95%CI, [72.7%, 90.5%]), chi‐squared of Q test was 62.18, but sensitivity analysis confirmed the stability of the result. Funnel plot, Eggerʼs test and Beggʼs test found no publication bias of analysis. Conclusion: The current meta‐analysis demonstrates an association between PD and CRC, indicating that early CRC screening is necessary for people with poor oral health, and oral health improvement might be beneficial for reducing CRC risk. [ABSTRACT FROM AUTHOR]

The association between famine exposure and type 2 diabetes (T2DM) remains controversial. A meta-analysis was performed to clarify the relation of famine exposure to T2DM risk in detail. A systematic literature search was performed in PubMed, Cochrane library, Web of Science, China National Knowledge Infrastructure (CNKI), Sinomed (CBM), Wanfang Data Knowledge Service Platform and China Science and Technology Journal VIP Database. The articles were limited to be available in English or Chinese before 10 April 2019. The pooled relative risk (RR) with 95% confidence interval (CI) was used to estimate the effect of famine exposure on T2DM. The I square value (I 2 ) was used to assess heterogeneity, and the random effects model (REM) was adopted as the pooling method. This meta-analysis included 24 published articles with 1,660,385 subjects. A significant association of famine exposure with increased risk of T2DM was observed (RR = 1.433, 95% CI: 1.101–1.865). The pooled RRs were different in terms of publication year, location, study design, sample size, famine duration and definition of diabetes (criteria). Longer the famine exposure experienced, greater the effect of famine exposure on T2DM would be. Compared to WHO criteria, studies of which diabetes diagnosed by ADA criteria and other criteria might more likely to find this association. Compared to moderate famine exposure, the pooled RR in severe famine was statistically significant. Furthermore, the pooled RR adjusted for the most confounders in females was 1.517 (95% CI: 1.018–2.261). In terms of period of famine exposure, compared to adult exposure, people who exposure famine in fetal, childhood, and adolescent were likely to be diabetes. Famine exposure may increase the risk of T2DM. The risk may vary with famine duration, definition of diabetes, gender and period of famine exposure. [ABSTRACT FROM AUTHOR]

Aim: It is well known that the use of proton pump inhibitor (PPI) is widespread in patients with liver cirrhosis. PPI counteracts H2 receptor inhibitor (H2RA) with its strong acid suppression effect. However, there is always a concern that PPI use may increase spontaneous bacteria peritonitis (SBP) development in cirrhotic patients. We aimed to investigate the association between acid suppression therapy (i.e. PPI or H2RA) and SBP through meta‐analysis. Methods: We searched PubMed, Medline, Web of Science, Cochrane library, and Embase for relevant studies published up to April 2019. Pooled OR and 95% CI were calculated by a random‐effects model. Funnel plots and Egger's tests were performed for the evaluation of publication bias. Non‐parametric "trim‐and‐fill" tests were conducted for sensitivity analysis. Results: A total of 20 original articles including 9566 cirrhotic patients were analyzed. The overall meta‐analysis highlighted that PPI use was associated with the risk of SBP (pooled OR 1.77, 95% CI 1.49–2.11). The conclusion was irrespective of study methods, whereas the result was inconsistent only in South America. However, the conclusion might not be stable enough and should be extrapolated with caution. Unlike PPI, we found H2RA was not associated with SBP (pooled OR 1.06, 95% CI 0.75–1.48). Conclusions: In conclusion, PPI use, but not H2RA, will increase the incidence of SBP in cirrhotic patients. In addition, H2RA might be beneficial for patients who require long‐term acid suppression therapy. [ABSTRACT FROM AUTHOR]

Background: Stressful life events as important stressors have gradually been recognized as the potential etiology that may lead to adverse birth outcomes such as preterm birth (PTB), low birth weight (LBW), and small for gestational age (SGA). However, researches on this topic have shown relatively inconsistent results. This systematic review and meta-analysis was performed to synthesize available data on the association between prenatal stressful life events and increased risks of PTB, LBW, and SGA.Methods: Electronic databases were searched from their inception until September 2020. Pooled relative risks (RRs) and 95% confidence intervals (CIs) were calculated to assess the association between prenatal stressful life events and PTB, LBW, and SGA using random effects models. In addition, subgroup analyses, cumulative meta-analyses, sensitivity analyses, and publication bias diagnosis were conducted. STATA 14.0 was applied for statistical analyses.Results: Totally 31 cohort studies involving 5,665,998 pregnant women were included. Prenatal stressful life events were associated with a 20% higher risk of PTB (RR = 1.20, 95%CI = 1.10-1.32), a 23% increased risk for LBW (RR = 1.23, 95%CI = 1.10-1.39), and a 14% higher risk of SGA (RR = 1.14, 95%CI = 1.08-1.20). Sensitivity analysis indicated the results were stable.Conclusions: Findings indicated that pregnant women experiencing prenatal stressful life events were at increased risk of PTB, LBW, and SGA. This information provided additional supports that pregnant women experiencing prenatal stressful life events would benefit from receiving assessment and management in prenatal care services. [ABSTRACT FROM AUTHOR]