内镜治疗急性胆源性胰腺炎的系统评价

目的:评价内镜治疗急性胆源性胰腺炎的临床疗效和安全性.方法:通过计算机检索全面收集全世界关于内镜治疗急性胆源性胰腺炎的随机对照试验/或半随机对照试验,并辅手工检索和其他检索.按照纳入排除标准纳入文献,由两名研究者独立筛选并提取资料,采用Handbook5.0推荐的质量评价标准评价纳入研究的方法学质量,采用RevMan5.0软件进行统计学处理.结果:最终纳入4个研究,包括317例患者.Meta分析结果显示内镜组治疗组与传统治疗组相比,在腹痛缓解时间(OR=-2.98,95%CI:-4.98,0.97)、白细胞复常时间(OR=-4.63,95%CI:-5.29,-3.97)、血淀粉酶复常时间(OR=-3.85,95%CI:-4.49,-3.21)、并发症发生率(OR=0.34,95%CI:0.18,0.66)和住院时间(OR=-7.51,95%CI:-9.89,-5.13)方面存在统计学差异.结论:当前研究显示,与传统治疗组相比,内镜治疗组能显著减少急性胆源性胰腺炎的腹痛缓解时间、白细胞及血淀粉酶复常时间,降低并发症的发生,缩短住院时间.     

Fatigue and acute coronary syndrome: a systematic review of contributing factors

Fatigue is a symptom of ACS, but it remains unclear who is at risk and what factors contribute to fatigue. The purpose of the systematic review was to identify factors that influence fatigue in patients with ACS. The review was guided by the Preferred Reporting Items for Systematic Reviews and Meta-Analyses. Literature published from 1981 to 2017 was reviewed, and of 983 articles screened, 36 met inclusion criteria. Variables contributing to fatigue fell into 3 categories: demographic characteristics, clinical characteristics, and other factors. More fatigue was found in women than men, and significant differences in fatigue were identified by race. Additionally, sleep deprivation, depression, and anxiety were associated with higher levels of fatigue. The findings highlight the importance of demographic, clinical, and other factors' impact on fatigue in ACS patients. Fatigue is an important symptom in ACS and healthcare providers must recognize how patient variables affect symptom expression.     

Point-of-care tests in suspected acute myocardial infarction: A systematic review

Background

A review of cardiac point-of-care (POC) tests used to detect or exclude acute myocardial infarction (AMI) with a focus on test performance within 6 hours after the start of symptoms.

Methods

A systematic review of articles on the diagnostic accuracy of point of care (POC) tests in patients suspected of AMI from the PubMed database from January 1st 1990 to December 1st 2012.

Results

Our search yielded 42 studies evaluating POC tests. Troponin (Tn) was investigated in 29 studies, and creatine kinase-myocardial band isoenzyme (CK-MB), myoglobin, and heart-type fatty acid-binding protein (H-FABP) each in 13 studies. Eight studies used a multimarker approach. In 14 studies results were presented or could be recalculated for test results within 6 hours of symptom onset or with a median time from symptoms onset to testing of 3 hours. In this time frame the negative predictive value (NPV) ranged from 31 to 97% with single testing, and from 59 to 100% with a multi-marker approach. Just one study satisfied to all items used for methods appraisal.

Conclusions

The ideal POC test for the diagnosis of AMI within 6 hours after the onset of symptoms does not yet exist. Evaluated POC tests were in general of poor methodological quality and reported too many false negatives to be considered as save for the assessment of patients suspected of AMI. A POC test of high-sensitive troponin could possibly fill the gap in the early hours after symptom onset, especially in those with non-definitive electrocardiography.     

Ultrafiltration for acute decompensated heart failure: A systematic review and meta-analysis of randomized controlled trials

Background

Current clinical guidelines recommend ultrafiltration (UF) for patients with acute decompensated heart failure (ADHF) who are unresponsive or resistant to diuretics. We systematically reviewed the latest randomized evidence on the efficacy and safety of UF in ADHF.

Methods

MEDLINE, EMBASE and the Cochrane database were searched in January 2013 for eligible randomized controlled trials (RCTs) evaluating UF in patients with ADHF. A Mantel–Haenszel random-effects model was used to calculate mean differences (MDs) and odds ratios (ORs) for continuous and dichotomous data, respectively, with 95% confidence intervals (CIs).

Results

Data of 12 studies (n = 659) were meta-analyzed; follow-up duration ranged from 36 h to 12 months. Compared to control, treatment of UF was associated with significant fluid removal (MD 1.28, 95% CI 0.43 to 2.12, P = 0.003) and weight loss (MD 1.23, 95% CI 0.03 to 2.44, P = 0.04), with no significant effects on all-cause mortality (OR 1.08, 95% CI 0.63 to 1.86, P = 0.77) or all-cause rehospitalization (OR 0.89, 95% CI 0.39 to 2.00, P = 0.77). No significant differences were observed in the analyses of change in serum creatinine or unscheduled medical care; analysis of adverse effects was inconclusive since only one study provided usable data.

Conclusions

For patients with ADHF, UF is effective in reducing fluid retention and body weight, with no significant benefits in mortality or rehospitalization. The current limited randomized evidence highlights the need for further well-conducted randomized studies of adequate power to establish the role of UF in ADHF patients for whom conventional HF treatment is unsuccessful or contraindicated.     

External application of herbal medicine for gout: A protocol for systematic review and meta-analysis of randomized controlled trials

Background:Gout affects a significant portion of the population worldwide annually. Numerous studies have been reported mainly in East Asia, explaining the use of traditional herbal decoctions for gout treatment. Our systematic review will be conducted to critically evaluate the evidence for the safety and effectiveness of external applications of herbal medicines on gout.Methods:Two independent researchers will perform electronic literature searches, study selection, data extraction, and quality assessment. To identify randomized controlled trials (RCTs) involving various external applications of herbal medicine for gout, a search will be carried out using the following 7 electronic databases: MEDLINE, EMBASE, Cochrane Library, KoreaMed, Oriental Medicine Advanced Searching Integrated System, Korean Studies Information Service System, and China National Knowledge Infrastructure. Each electronic database will be searched for articles published from their inception to the present date. Studies will be selected based on predefined criteria and summarized data regarding study participants, interventions, control groups, outcome measures, side effects, and risk of bias. There are no restrictions on publication status or language. Studies that evaluated any type of external application of herbal medicines will be eligible for inclusion, and the primary outcome will be the blood uric acid level. The methodological quality of the included RCTs will be assessed using the Cochrane risk-of-bias tool.Results:The present study will evaluate effectiveness and safety of external application of herbal medicines for gout.Conclusion:Our findings will establish evidence for the external application of herbal medicines for gout and will be informative for patients with gout, clinicians, policymakers, and researchers.The results of this systematic review will be published in a peer-reviewed journal and disseminated electronically and in print. This review will be updated to inform and guide healthcare practices.     

Effectiveness and safety of Liuhe Pill for treating gout: A protocol for a systematic review and meta-analysis

Background:Liuhe Pill as a famous traditional Chinese medicine formula is usually used to treat gout, acute pancreatitis, and cellulitis in China. But at present, there is no systematic evaluation report on its therapeutic effectiveness and safety of Liuhe Pill for treating gout. This protocol aims to assess the efficacy and safety of Liuhe Pill for treating gout.Methods:We will search the Web of Knowledge, EMBASEWANFANG DATA, China National Knowledge Infrastructure (CNKI), PubMed, ClinicalTrials.gov and Cochrane Library from inception to October 31, 2021 to retrieve relevant studies. We will also search citations of relevant primary and review. Authors of abstract in the meeting will be further searched in PubMed for potential full articles. To minimize the risk of publication bias, we will conduct a comprehensive search that included strategies to find published and unpublished studies. Two authors independently judged study eligibility and extracted data. Heterogeneity will be examined by computing the Q statistic and I² statistic.Results:This study assessed the efficiency and safety of Liuhe Pill for treating gout.Conclusions:This study will provide reliable evidence-based evidence for the clinical application of Liuhe Pill for treating gout.     

Efficacy of acute care pathways for older patients: a systematic review and meta-analysis

Meeting the needs of acute geriatric patients is often challenging, and although evidence shows that older patients need tailored care, it is still unclear which interventions are most appropriate. The objective of this study is to systematically evaluate the hospital-wide acute geriatric models compared with conventional pathways. The design of the study includes hospital-wide geriatric-specific models characterized by components including patient-centered care, frequent medical review, early rehabilitation, early discharge planning, prepared environment, and follow‐up after discharge. Primary and secondary outcomes were considered, including functional decline, activities of daily living (ADL), length-of-stay (LoS), discharge destination, mortality, costs, and readmission. A systematic review and meta-analysis were conducted in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) guidelines. A total of 20 studies reporting on 15 trials and acutely admitted patients with an average age of 79, complex conditions and comorbidities to acute geriatric-specific pathways (N = 13,595) were included. Geriatric-specific models were associated with lower costs (weighted mean difference, WMD =  − $174.98, 95% CI = -$332.14 to − $17.82; P = 0.03), and shorter LoS (WMD =  − 1.11, 95% CI =  − 1.39 to − 0.83; P < 0.001). No differences were found in functional decline, ADL, mortality, case fatalities, discharge destination, or readmissions. Geriatric-specific models are valuable for improving patient and system-level outcomes. Although several interventions had positive results, further research is recommended to study hospital-wide geriatric-specific models.Supplementary InformationThe online version contains supplementary material available at 10.1007/s10433-022-00743-w.     

Treatment of disrupted and disconnected pancreatic duct in necrotizing pancreatitis: A systematic review and meta-analysis

BackgroundNecrotizing pancreatitis may lead to loss of integrity of the pancreatic duct, resulting in leakage of pancreatic fluid. Pancreatic duct disruption or disconnection is associated with a prolonged disease course and particular complications. Since a standard treatment for this condition is currently lacking, we performed a systematic review of the literature to compare outcomes of various treatment strategies.MethodsA systematic review was performed according to the PRISMA guidelines in the PubMed, EMBASE and Cochrane databases. Included were articles considering the treatment of patients with disrupted or disconnected pancreatic duct resulting from acute necrotizing pancreatitis.ResultsOverall, 21 observational cohort studies were included comprising a total of 583 relevant patients. The most frequently used treatment strategies included endoscopic transpapillary drainage, endoscopic transluminal drainage, surgical drainage or resection, or combined procedures. Pooled analysis showed success rates of 81% (95%-CI: 60–92%) for transpapillary and 92% (95%-CI: 77–98%) for transluminal drainage, 80% (95%-CI: 67–89%) for distal pancreatectomy and 84% (95%-CI: 73–91%) for cyst-jejunostomy. Success rates did not differ between surgical procedures (cyst-jejunostomy and distal pancreatectomy (risk ratio = 1.06, p = .26)) but distal pancreatectomy was associated with a higher incidence of endocrine pancreatic insufficiency (risk ratio = 3.06, p = .01). The success rate of conservative treatment is unknown.DiscussionDifferent treatment strategies for pancreatic duct disruption and duct disconnection after necrotizing pancreatitis show high success rates but various sources of bias in the available studies are likely. High-quality prospective, studies, including unselected patients, are needed to establish the most effective treatment in specific subgroups of patients, including timing of treatment and long-term follow-up.     

Efficacy of Lactobacillus rhamnosus GG in treatment of acute pediatric diarrhea: A systematic review with meta-analysis

BACKGROUND Diarrhea is a major infectious cause of childhood morbidity and mortality worldwide.In clinical trials,Lactobacillus rhamnosus GG ATCC 53013(LGG)has been used to treat diarrhea.However,recent randomized controlled trials(RCTs)found no evidence of a beneficial effect of LGG treatment.AIM To evaluate the efficacy of LGG in treating acute diarrhea in children.METHODS The EMBASE,MEDLINE,PubMed,Web of Science databases,and the Cochrane Central Register of Controlled Trials were searched up to April 2019 for metaanalyses and RCTs.The Cochrane Review Manager was used to analyze the relevant data.RESULTS Nineteen RCTs met the inclusion criteria and showed that compared with the control group,LGG administration notably reduced the diarrhea duration[mean difference(MD)-24.02 h,95%confidence interval(CI)(-36.58,-11.45)].More effective results were detected at a high dose≥1010 CFU per day[MD-22.56 h,95%CI(-36.41,-8.72)]vs a lower dose.A similar reduction was found in Asian and European patients[MD-24.42 h,95%CI(-47.01,-1.82);MD-32.02 h,95%CI(-49.26,-14.79),respectively].A reduced duration of diarrhea was confirmed in LGG participants with diarrhea for less than 3 d at enrollment[MD-15.83 h,95%CI(-20.68,-10.98)].High-dose LGG effectively reduced the duration of rotavirus-induced diarrhea[MD-31.05 h,95%CI(-50.31,-11.80)]and the stool number per day[MD-1.08,95%CI(-1.87,-0.28)].CONCLUSION High-dose LGG therapy reduces the duration of diarrhea and the stool number per day.Intervention at the early stage is recommended.Future trials are expected to verify the effectiveness of LGG treatment.     

Sex differences in symptom presentation in acute myocardial infarction: a systematic review and meta-analysis

Background

Recognition of sex differences in symptom presentation of acute myocardial infarction (AMI) is important for timely clinical diagnosis. This review examined whether women are equally as likely as men to present with chest pain.

Methods

We conducted a systematic review and meta-analysis of English language research articles published between 1990 and 2009.

Results

Meta-analysis showed women with AMI had lower odds and a lower rate of presenting with chest pain than men (odds ratio .63; 95% confidence interval, .59-.68; risk ratio .93; 95% confidence interval, .91-.95). Women were significantly more likely than men to present with fatigue, neck pain, syncope, nausea, right arm pain, dizziness, and jaw pain.

Conclusion

Health campaigns on symptom presentation of AMI should continue to promote chest pain as the cardinal symptom of AMI, but also reflect a wider spectrum of possible symptoms and highlight potential differences in symptom presentation between men and women.     

A systematic review and meta-analysis on the safety and efficacy of febuxostat versus allopurinol in chronic gout

Objective

To evaluate the safety and efficacy of febuxostat compared to allopurinol for the treatment of chronic gout.

Methods

We did a systematic review and meta-analysis of randomized and non-randomized controlled trials that compared oral febuxostat to oral allopurinol for treatment of chronic gout. Two reviewers independently selected studies, assessed study quality, and extracted data. Risk ratios (RR) were calculated with random effects and were reported with corresponding 95% confidence intervals (CI).

Results

From 1076 potentially relevant citations, 7 studies and 25 associated publications met inclusion criteria; 5 studies were ultimately included in the analysis. Febuxostat did not reduce the risk of gout flares compared with allopurinol (RR = 1.16, 95% CI = 1.03–1.30, I² = 44%). Overall, the risk of any adverse event was lower in febuxostat recipients compared to allopurinol (RR = 0.94, 95% CI = 0.90–0.99, I² = 13%). Patients receiving febuxostat were more likely to achieve a serum uric acid of <6 mg/dl than allopurinol recipients (RR = 1.56, 95% CI = 1.22–2.00, I² = 92%). Subgroup analysis did not indicate any significant difference between high- and low-dose febuxostat on the risk of gout flares.

Conclusion

Although febuxostat was associated with higher likelihood of achieving a target serum uric acid level of <6 mg/dl, there was significant heterogeneity in the pooled results. There was no evidence that febuxostat is superior to allopurinol for clinically relevant outcomes. Given its higher cost, febuxostat should not be routinely used for chronic gout.     

Colonic stenting vs emergent surgery for acute left-sided malignant colonic obstruction: A systematic review and meta-analysis

AIM: To investigate the effects of emergent preoperative self-expandable metallic stent (SEMS) vs emergent surgery for acute left-sided malignant colonic obstruction.METHODS: Two investigators independently searched the MEDLINE, EMBASE and Cochrane Central Register of Controlled Trials, as well as references of included studies to identify randomized controlled trials (RCTs) that compared two or more surgical approaches for acute colonic obstruction. Summary risk ratios (RR) and 95% CI for colonic stenting and emergent surgery were calculated.RESULTS: Eight studies met the selection criteria, involving 444 patients, of whom 219 underwent SEMS and 225 underwent emergent surgery. Seven studies reported difference of the one-stage stoma rates between the two groups (RR, 0.60; 95% CI: 0.48-0.76; P < 0.0001). Only three RCTs described the follow-up stoma rates, which showed no significant difference between the two groups (RR, 0.80; 95% CI: 0.59-1.08; P = 0.14). Difference was not significant in the mortality between the two groups (RR, 0.91; 95% CI: 0.50-1.66; P = 0.77), but there was significant difference (RR, 0.57; 95% CI: 0.44-0.74; P < 0.0001) in the overall morbidity. There were no significant differences between the two groups in the anastomotic leak rate (RR, 0.60; 95% CI: 0.28-1.28; P = 0.19), occurrence of abscesses, including peristomal abscess, intraperitoneal abscess and parietal abscess (RR, 0.83; 95% CI: 0.36-1.95; P = 0.68), and other abdominal complications (RR: 0.67; 95% CI: 0.40-1.12; P = 0.13).CONCLUSION: SEMS is not obviously more advantageous than emergent surgery for patients with acute left-sided malignant colonic obstruction.     

Detection of scabies: A systematic review of diagnostic methods

BACKGROUND:

Accurate diagnosis of scabies infection is important for patient treatment and for public health control of scabies epidemics.

OBJECTIVE:

To systematically review the accuracy and precision of history, physical examination and tests for diagnosing scabies.

METHODS:

Using a structured search strategy, Medline and Embase databases were searched for English and French language articles that included a diagnosis of scabies. Studies comparing history, physical examination and/or any diagnostic tests with the reference standard of microscopic visualization of mites, eggs or fecal elements obtained from skin scrapings or biopsies were included for analysis. Data were extracted using standard criteria.

RESULTS:

History and examination of pruritic dermatoses failed to accurately diagnose scabies infection. Dermatoscopy by a trained practitioner has a positive likelihood ratio of 6.5 (95% CI 4.1 to 10.3) and a negative likelihood ratio of 0.1 (95% CI 0.06 to 0.2) for diagnosing scabies. The accuracy of other diagnostic tests could not be calculated from the data in the literature.

CONCLUSIONS:

In the face of such diagnostic inaccuracy, clinical judgment is still practical in diagnosing scabies. Two tests are used – the burrow ink test and handheld dermatoscopy. The burrow ink test is a simple, rapid, noninvasive test that can be used to screen a large number of patients. Handheld dermatoscopy is an accurate test, but requires special equipment and trained practitioners. Given the morbidity and costs of scabies infection, and that studies to date lack adequate internal and external validity, research to identify or develop accurate diagnostic tests for scabies infection is needed and justifiable.     

Age at menopause in India: A systematic review

Background and aimsMenopause is a physiological process in nature and hence, variations in the age of menopause are not expected. Hence, the study was conducted with an objective to calculate the reliable estimates of age at menopause for India, and understand the differentials in women’s age at menopause throughout the country.MethodsA total of 202 studies of age at menopause, covering the period 2009–2020, were accessed from PubMed database and Google. Of these only ten studies met the selection criteria for this paper, which is that the data for these studies must be collected from house-to-house surveys.ResultsThe average age at menopause in India, with minimal publication bias, is 46.6 years (95% CI: 44.83, 48.44). In one study slightly above 1.96 Standard Deviation, was observed, as ascertained by Funnel Plot and Egger’s test. The mean age ranged from a minimum of 44.69 years (95% CI: 35.01, 54.37) to a maximum of 48.95 (95% CI: 42.29, 55.61) years. Furthermore, the age at menopause did not exhibit any significant variation by age at menarche, although the association was positive.ConclusionsThe age at menopause showed positive association with age at menarche. In India, during the period 2009–2020, it was 46.6 years, which significantly lower than the age in some developed countries. The differences may be methodological since no information was found regarding the distribution of age at menopause in the studies that were considered for meta-analysis.     

环孢素A治疗再生障碍性贫血临床疗效与安全性的系统评价

目的:系统评价环孢素A(CsA)治疗再生障碍性贫血(AA)的临床疗效。方法:电子检索MEDLINE(1996年1月~2006年5月)、EMBASE(1984年1月~2006年5月)、Cochrane临床对照试验资料库(2006年第2期)、中国Cochrane中心临床对照实验资料数据库(2006年第2期)、中国生物医学文献数据库(1978年1月~2006年5月),手工检索纳入试验的所有中文及外文文献及相关文献,并逐个进行方法学质量评价,采用Rev-Man4.2.7软件进行Meta分析。结果:共纳入7个随机对照试验(513例患者)。Meta分析结果显示,①病死率:1个研究与左旋咪唑比较,发生病死率的差异无统计学意义[RR0.52,95%CI(0.25,1.05)],1个研究与ATG比较,发生病死率的差异有统计学意义[RR0.14,95%CI(0.03,0.61)];②总有效率:2个研究与左旋咪唑比较,其差异有统计学意义[RR2.24,95%CI(1.55,3.23)],3个研究与不使用CsA相比较,其差异有统计学意义[RR1.70,95%CI(1.35,2.14)],2个研究与ATG比较,其差异有统计学意义[RR1.77,95%CI(1.03,3.03)];③不良反应:CsA较其他药物不良反应少。结论:现有的有限证据表明,CsA与不使用CsA或使用其他药物相比较,部分或全部降低AA患者的病死率、总有效率和不良反应的发生率;需要更多设计良好的随机、双盲、安慰剂对照试验加以证实。     

A systematic review of clozapine induced cardiomyopathy

Background

Clozapine is a unique anti-psychotic medication that is most effective in the treatment of refractory schizophrenia and reducing suicidality. Cardiomyopathy is among the side effects of this medication that limits its use. There are a number of case reports, case series and expert opinion papers discussing clozapine induced cardiomyopathy, but there is no evidence-based review of the subject to guide clinicians.

Methods

We undertook a systematic review of the literature on cardiomyopathy associated with clozapine. The primary systemic search was in MEDLINE but EMBASE, PsycINFO, and Cochrane were searched and manufacturers of clozapine were contacted for cases. Articles were then individually reviewed to find additional reports.

Results

We identified 17 articles detailing 26 individual cases and 11 additional articles without individual case data. The mean age at time of diagnosis was 33.5 years. The mean dose of clozapine on presentation was 360 mg. Symptoms developed at an average of 14.4 months after initiating clozapine. The clinical presentation was generally consistent with heart failure: including shortness of breath (60%) and palpitations (36%). Echocardiography at presentation showed dilated cardiomyopathy in 39% of cases and was not specified in other cases.

Conclusion

There should be a low threshold in performing echocardiography in suspected cases of clozapine induced cardiomyopathy. Clozapine should be withheld in the setting of cardiomyopathy without other explanation. There is limited data on the safety of drug re-challenge in clozapine induced cardiomyopathy. Re-challenge may be considered in carefully selected cases but close monitoring and frequent echocardiography are required.     

Self-care in Iranian patients with diabetes: A systematic review and meta-analysis

ObjectivesSelf-care is a major factor in managing diabetes. This study aimed to determine the self-care status of Iranian patients with diabetes and to estimate the percentage of self-care in these individuals through a systematic review and meta-analysis.MethodsIn this systematic review and meta-analysis 53 domestic articles published in Farsi and English were evaluated. We conducted database searches in domestic and foreign databases of Scientific Information Database (SID), MagIran, Google Scholar, Web of Science, Pub Med, and Scopus with no time limit. Data analysis was performed in Stata version 12 using meta-analysis method and the random effects model.ResultsA total of 50 articles (53 groups) with a sample size of 9565 were systematically reviewed. The percentage of self-care in patients with diabetes was reported to be 48.86 (95% confidence interval [CI]: 43.79–53.94). According to the results, the percentage of self-care score was higher in patients with type I diabetes (55.53) when compared with patients with type II diabetes (49.26).ConclusionsSince patients with diabetes obtained only half of the self-care score and given the importance of self-care in controlling and treating diabetes, it is necessary to perform actions to improve self-care such as benefiting from health facilities, and social and family support.     

Elevated parathyroid hormone levels and cognitive function: A systematic review

ObjectiveTo systematically estimate the association between elevated parathyroid hormone (PTH) levels and cognitive function.MethodsThis review was conducted on ten papers identified through database searches from inception to 31 October 2018. The quality of studies was assessed using the Downs and Black checklist.ResultsThere is a low volume of data reporting on the impact of elevated PTH levels on cognitive impairment. The quality of the identified studies ranged from poor (37 %) to good (76 %). Although the results from studies were mixed, one cross-sectional study and one prospective study suggested a link between elevated PTH levels and a decrease in the Mini-Mental State Examination (MMSE) score. Three cross-sectional studies that assessed other cognitive domain in specific domains, such as language, memory and executive function provided mixed results for an association between elevated PTH levels and cognitive function. Two studies showed mixed evidence for a link between elevated PTH levels and poor executive function. One prospective study, one cross-sectional study and three case-control studies provide mixed evidence for an association between higher PTH levels and Alzheimer´s disease (AD). Two studies showed limited evidence for an association between elevated PTH levels and vascular dementia.ConclusionThis review presented that the level of evidence available to support an association between elevated PTH levels and cognitive function was generally weak and inconsistent. Future studies with more better methodological quality are needed.