scholarly journals Is caffeine intake a risk factor leading to infertility? -An epidemiological systematic review of controlled clinical studies

2020 ◽  
Author(s):  
Bu Fanlong ◽  
Xue Feng ◽  
Xiao-Ying Yang ◽  
Jun Ren ◽  
Hui-juan Cao
Keyword(s):  
Systematic Review ◽  
Cohort Study ◽  
Clinical Studies ◽  
Case Control ◽  
Average Score ◽  
Caffeine Intake ◽  
High Risk Population ◽  
High Dose ◽  
Case Control Studies ◽  
High Doses

Abstract Background: Previous studies showed that high dose of caffeine intake may induce some specific human reproductive system diseases, even lead to infertility. This review is aimed to systematically review the evidence from all controlled clinical studies of caffeine intake for infertility. Methods: Relevant randomized/quasi-randomized controlled trials, non-randomized clinical studies, cohort studies, and case-control studies were included. Participants were either those without a history of infertility who are willing to have a baby (for prospective studies) or infertile patients with confirmed diagnosis (for retrospective studies). Caffeine or caffeine-containing beverage was observed as the exposure factor. The key outcome was the diagnosis of infertility. Results: Four studies (one cohort study and three case-control studies) involving 12912 participants were included. According NOS, the average score of case-control studies was 6, and the cohort study achieved 9. Meta-analysis and subgroup analysis were conducted. The results showed that low (OR 0.95, 95%CI 0.78-1.16), medium (OR 1.14, 95%CI 0.69-1.86) and high doses (OR 1.86, 95%CI 0.28-12.22) of caffeine intake may not increase the risk of infertility. The GRADE method was used to assess the certainty of the evidence and the results showed that the quality of the three evidence bodies were all low. Conclusion: Our study provides low quality evidence that regardless of low, medium and high doses of caffeine intake do not appear increase the risk of infertility. But the conclusion should be treated with caution. We suggest high-risk population of infertility may consider to control the dose of caffeine intake (less than 200mg/d). Systematic review registration: PROSPERO CRD42015015714

scholarly journals Relationship between caffeine intake and infertility: a systematic review of controlled clinical studies

2020 ◽  
Author(s):  
Bu Fanlong ◽  
Xue Feng ◽  
Xiao-Ying Yang ◽  
Jun Ren ◽  
Hui-juan Cao
Keyword(s):  
Systematic Review ◽  
Cohort Study ◽  
Clinical Studies ◽  
Meta Analysis ◽  
Case Control ◽  
Average Score ◽  
Caffeine Intake ◽  
High Dose ◽  
Case Control Studies ◽  
High Doses

Abstract Background: Previous studies showed that high dose of caffeine intake may induce some specific human reproductive system diseases, even lead to infertility. This review is aimed to systematically review the evidence from all controlled clinical studies of caffeine intake for infertility.Methods: Relevant randomized/quasi-randomized controlled trials, non-randomized clinical studies, cohort studies, and case-control studies were included. Participants were either those without a history of infertility who are willing to have a baby (for prospective studies) or infertile patients with confirmed diagnosis (for retrospective studies). Caffeine or caffeine-containing beverage was observed as the exposure factor. The key outcome was the diagnosis of infertility.Results: Four studies (one cohort study and three case-control studies) involving 12912 participants were included. According Newcastle - Ottawa Scale (NOS), the average score of case-control studies was 6, and the cohort study achieved 9. Meta-analysis and subgroup analysis were conducted. The results showed that low (OR 0.95, 95%CI 0.78-1.16), medium (OR 1.14, 95%CI 0.69-1.86) and high doses (OR 1.86, 95%CI 0.28-12.22) of caffeine intake may not increase the risk of infertility. The GRADE method was used to assess the certainty of the evidence and the results showed that the quality of the three evidence bodies were all low.Conclusion: Our study provides low quality evidence that regardless of low, medium and high doses of caffeine intake do not appear increase the risk of infertility. But the conclusion should be treated with caution. Systematic review registration: PROSPERO CRD42015015714

Does coffee, tea and caffeine consumption reduce the risk of incident breast cancer? A systematic review and network meta-analysis

2021 ◽  
pp. 1-13
Author(s):  
Shu Wang ◽  
Xiang Li ◽  
Yue Yang ◽  
Jingping Xie ◽  
Mingyue Liu ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Systematic Review ◽  
Postmenopausal Women ◽  
Meta Analysis ◽  
High Dose ◽  
Dependent Manner ◽  
Tea Consumption ◽  
Case Control Studies ◽  
High Concentration ◽  
Coffee Intake

Abstract Objective: We aimed to evaluate the association between coffee and/or tea consumption and breast cancer (BC) risk among premenopausal and postmenopausal women and to conduct a network meta-analysis. Design: Systematic review and network meta-analysis. Setting: We conducted a systematic review of electronic publications in the last 30 years to identify case–control studies or prospective cohort studies that evaluated the effects of coffee and tea intake. Results: Forty-five studies that included more than 3 323 288 participants were eligible for analysis. Network meta-analysis was performed to determine the effects of coffee and/or tea consumption on reducing BC risk in a dose-dependent manner and differences in coffee/tea type, menopause status, hormone receptor and the BMI in subgroup and meta-regression analyses. According to the first pairwise meta-analysis, low-dose coffee intake and high-dose tea intake may exhibit efficacy in preventing ER(estrogen receptor)− BC, particularly in postmenopausal women. Then, we performed another pairwise and network meta-analysis and determined that the recommended daily doses were 2–3 cups/d of coffee or ≥5 cups/d of tea, which contained a high concentration of caffeine, particularly in postmenopausal women. Conclusions: Coffee and tea consumption is not associated with a reduction in the overall BC risk in postmenopausal women and is associated with a potentially lower risk of ER− BC. And the highest recommended dose is 2–3 cups of coffee/d or ≥5 cups of tea/d. They are potentially useful dietary protectants for preventing BC.

Respiratory disturbances in fibromyalgia: a systematic review and meta-analysis of case control studies

2021 ◽  
Author(s):  
Araceli Ortiz-Rubio ◽  
Irene Torres-Sánchez ◽  
Irene Cabrera-Martos ◽  
Laura López-López ◽  
Janet Rodríguez-Torres ◽  
...  
Keyword(s):  
Systematic Review ◽  
Meta Analysis ◽  
Case Control ◽  
Case Control Studies

scholarly journals The Effect of Prophylactic HPV Vaccines on Oral and Oropharyngeal HPV Infection—A Systematic Review

Viruses ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1339
Author(s):  
Kristoffer Juul Nielsen ◽  
Kathrine Kronberg Jakobsen ◽  
Jakob Schmidt Jensen ◽  
Christian Grønhøj ◽  
Christian Von Buchwald
Keyword(s):  
Cohort Study ◽  
Oropharyngeal Cancer ◽  
Hpv Infection ◽  
Case Control ◽  
Igg Antibodies ◽  
Hpv Vaccines ◽  
Case Control Studies ◽  
Cross Sectional ◽  
Post Vaccination ◽  
Cross Sectional Studies

Human papillomavirus (HPV) imposes an increased risk of developing cervical, anal and oropharyngeal cancer. In the Western world, HPV infection is currently the major cause of oropharyngeal cancer. The effectiveness of HPV vaccines for oral or oropharyngeal HPV infection is yet to be determined. This study conducted a systematic literature search in Pubmed and Embase. Studies investigating the impact of HPV vaccines on oral or oropharyngeal HPV infection were enrolled. This review reports the relative prevention percentage (RPP), including a risk of bias assessment as well as a quality assessment study. Nine studies were included (48,777 participants): five cross-sectional studies; one randomized community trial study (RCT); one longitudinal cohort study; and two case-control studies. A significant mean RPP of 83.9% (66.6–97.8%) was calculated from the cross-sectional studies, 82.4% in the included RCT and 83% in the longitudinal cohort study. Further, two case-control studies that measured antibody response in participants immunized with HPV vaccines were included. Respectively, 100% and 93.2% of participants developed HPV-16 Immunoglobulin G (IgG) antibodies in oral fluids post-vaccination. Analysis of the studies identified a significant decrease in vaccine-type oral or oropharyngeal HPV infections in study participants immunized with HPV vaccines across study designs and heterogenous populations. Further, a significant percentage of participants developed IgG antibodies in oral fluid post-vaccination.

scholarly journals Running and Knee Osteoarthritis: A Systematic Review and Meta-analysis

2016 ◽  
Vol 45 (6) ◽  
pp. 1447-1457 ◽  
Author(s):  
Kate A. Timmins ◽  
Richard D. Leech ◽  
Mark E. Batt ◽  
Kimberley L. Edwards
Keyword(s):  
Systematic Review ◽  
Full Text ◽  
Meta Analysis ◽  
Positive Association ◽  
Case Control ◽  
Case Control Studies ◽  
Eligibility Criteria ◽  
Knee Oa ◽  
Knee Joint Surgery ◽  
Newcastle Ottawa Scale

Background: Osteoarthritis (OA) is a chronic condition characterized by pain, impaired function, and reduced quality of life. A number of risk factors for knee OA have been identified, such as obesity, occupation, and injury. The association between knee OA and physical activity or particular sports such as running is less clear. Previous reviews, and the evidence that informs them, present contradictory or inconclusive findings. Purpose: This systematic review aimed to determine the association between running and the development of knee OA. Study Design: Systematic review and meta-analysis. Methods: Four electronic databases were searched, along with citations in eligible articles and reviews and the contents of recent journal issues. Two reviewers independently screened the titles and abstracts using prespecified eligibility criteria. Full-text articles were also independently assessed for eligibility. Eligible studies were those in which running or running-related sports (eg, triathlon or orienteering) were assessed as a risk factor for the onset or progression of knee OA in adults. Relevant outcomes included (1) diagnosis of knee OA, (2) radiographic markers of knee OA, (3) knee joint surgery for OA, (4) knee pain, and (5) knee-associated disability. Risk of bias was judged by use of the Newcastle-Ottawa scale. A random-effects meta-analysis was performed with case-control studies investigating arthroplasty. Results: After de-duplication, the search returned 1322 records. Of these, 153 full-text articles were assessed; 25 were eligible, describing 15 studies: 11 cohort (6 retrospective) and 4 case-control studies. Findings of studies with a diagnostic OA outcome were mixed. Some radiographic differences were observed in runners, but only at baseline within some subgroups. Meta-analysis suggested a protective effect of running against surgery due to OA: pooled odds ratio 0.46 (95% CI, 0.30-0.71). The I2 was 0% (95% CI, 0%-73%). Evidence relating to symptomatic outcomes was sparse and inconclusive. Conclusion: With this evidence, it is not possible to determine the role of running in knee OA. Moderate- to low-quality evidence suggests no association with OA diagnosis, a positive association with OA diagnosis, and a negative association with knee OA surgery. Conflicting results may reflect methodological heterogeneity. More evidence from well-designed, prospective studies is needed to clarify the contradictions.

scholarly journals Association Between Glucocorticoids Treatment and Viral Clearance Delay in Patients with COVID-19: A Systematic Review and Meta-Analysis

2021 ◽  
Author(s):  
Jianbo Li ◽  
Xuelian Liao ◽  
Yue Zhou ◽  
Luping Wang ◽  
Hang Yang ◽  
...  
Keyword(s):  
Systematic Review ◽  
Meta Analysis ◽  
Severity Of Illness ◽  
Viral Clearance ◽  
Cochrane Library ◽  
High Dose ◽  
Hazard Ratios ◽  
Subgroup Analyses ◽  
High Doses ◽  
Critical Ill

Abstract BackgroundEvidence of glucocorticoids on viral clearance delay of COVID-19 patients is not clear. MethodsIn this systematic review and meta-analysis, we searched studies on Medline, Embase, EBSCO, ScienceDirect, Web of Science, Cochrane Library, and ClinicalTrials.gov from 2002 to December 2, 2020. We mainly pooled the adjusted hazard ratios (HRs), mean difference (MD) or risk ratios (RRs) of viral clearance delay and did subgroup analyses by doses and the severity of illness.ResultsOne trial and 38 observational studies, with a total of 7119 patients, were identified. Glucocorticoids treatment was associated with delayed viral clearance in COVID-19 (Adjusted HR 1.71, 95% CI 1.51 to 1.94, I2=22%, PI 1.45 to 2.01), based on moderate-quality evidence. In subgroup analyses, risk of viral clearance delay was significantly higher among COVID-19 patients being mild or moderate ill (adjusted HR 1.94, 95% CI 1.39 to 2.70, I2=52%; MD 2.59, 95% CI 1.21 to 3.97, I2=24%), but not in those of being severe or critical ill (adjusted HR 1.85, 95% CI 1.05 to 3.26; MD 0.22, 95% CI -1.85 to 2.29, I2=56%); taking high doses (adjusted HR 1.49, 95% CI 1.03 to 2.15; unadjusted RR 1.47, 95% CI 1.12 to 1.94) rather taking low doses (adjusted HR 1.39, 95% CI 0.93 to 2.08; unadjusted RR 1.33, 95% CI 1.00 to 1.77) or pulse (unadjusted RR 1.85, 95% CI 0.66 to 5.19).ConclusionsGlucocorticoids treatment delayed viral clearance in COVID-19 patients of being mild or moderate ill or taking a high dose, rather in those of being severe or critical ill or taking low dose or pulse.

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