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Nevin Manimala Statistics

Genetic evidence for the causal linkage between telomere length and aortic aneurysm risk: A Mendelian randomisation study

Eur J Clin Invest. 2023 Jul 1:e14056. doi: 10.1111/eci.14056. Online ahead of print.

ABSTRACT

BACKGROUND: Evidence of a clear causal relationship between telomere length and aortic aneurysms is limited by the potential for confounding or reverse causation effects. In this study, we used a Mendelian randomisation (MR) approach to investigate this putative causal association.

METHODS: In total, 118 telomere length-associated single-nucleotide polymorphisms, identified in 472,174 individuals of European ancestry, were used as the instrumental variables. Summary statistics for genome-wide association studies of aortic aneurysms were obtained from the FinnGen consortium. For the primary MR analyses, the inverse-variance weighted random-effects method was used and was supplemented with multivariable MR, weighted median and MR-Egger approaches. The MR-Egger intercept test, Cochran’s Q test and ‘leave-one-out’ sensitivity analysis were performed to evaluate the horizontal pleiotropy, heterogeneity and stability of the genetic variants. Forward and reverse MR analyses were performed.

RESULTS: All forward univariable MR analyses showed that longer telomere lengths decreased aortic aneurysm risks (total aortic aneurysms: OR = 0.80, 95% CI 0.67-0.96, p = .015; thoracic aortic aneurysms: OR = 0.82, 95% CI 0.68-0.98, p = .026; abdominal aortic aneurysms: OR = 0.525, 95% CI 0.398-0.69, p < .001), whereas all reverse MR analyses suggested the absence of aortic aneurysm liability on telomere length. The sensitivity analysis results were robust, and no evidence of horizontal pleiotropy was observed.

CONCLUSIONS: Our results support a possible causal association between telomere length and aortic aneurysms, providing new insights into the involvement of telomere biology in this condition and offering a potential avenue for targeted therapeutic interventions.

PMID:37392033 | DOI:10.1111/eci.14056

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Examining the Association Between a Modified Quan-Charlson Comorbidity Index (QCCI) and HIV Viral Suppression: A Cross-Sectional Analysis of DC Cohort Participants

AIDS Res Hum Retroviruses. 2023 Jun 30. doi: 10.1089/AID.2022.0186. Online ahead of print.

ABSTRACT

With the advancement of effective antiretroviral therapy (ART), people with HIV live longer, and many are developing non-AIDS comorbidities. It is important to assess how comorbidities are associated with HIV-related health outcomes, such as viral suppression (VS). The aim of this study was to analyze the association between comorbidity burden, measured using a modified Quan-Charlson Comorbidity Index (QCCI), and VS (viral load result of <200 copies/mL). We hypothesized that an increase in QCCI score, indicating a higher risk for mortality, would correlate with lower likelihood of VS because of the burden of comorbidity treatment, possibly leading to worse antiretroviral adherence. Our analysis included participants from the DC Cohort Longitudinal HIV Study in Washington, D.C. Eligible participants were aged ≥18 years and enrolled in the cohort as of January 1, 2018 (n=2,471). A modified QCCI score, which weighs selected comorbidities (not including HIV/AIDS) and predicts mortality, was calculated using ICD-9/10 codes from electronic health records. Multivariable logistic regressions were used to characterize the association between QCCI composite scores and VS. Participants were predominantly virally suppressed (89.6%), male (73.9%), Non-Hispanic Black (74.7%) and between 18-55 years old (59.3%). The median QCCI score was 1 (range= 1-12, IQR= 0-2), demonstrating predominately low mortality risk. We did not establish a statistically significant association between QCCI score and VS (adjusted odds ratio=1.06, 95% CI 0.96-1.17). Our findings suggest that a higher QCCI score was not associated with lower VS in this population, which may be partly due to the high retention in care among Cohort participants.

PMID:37392022 | DOI:10.1089/AID.2022.0186

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Perspectives on Design Approaches for HIV Prevention Efficacy Trials

AIDS Res Hum Retroviruses. 2023 Jun 30. doi: 10.1089/AID.2022.0150. Online ahead of print.

ABSTRACT

The challenge of designing future HIV prevention efficacy trials in a rapidly evolving HIV prevention landscape was explored through a series of virtual stakeholder’s engagement meetings convened online between October 2020 and April 2021. A broad array of stakeholders from the HIV prevention research community reviewed current trial designs and lessons learned, explored issues specific to unique product classes, and concluded with specialist-focused examinations of statistical design concepts and the importance of community engagement in research. The aim was to reflect on current approaches and evaluate new trial design approaches for evaluating efficacy of a candidate prevention strategy in the context of an active-controlled trial, which does not include a placebo arm. Here, we provide a summary of the discussion points that included gaps in understanding and logical next steps in the prevention research pathway. The technical challenges involved in the statistical design approaches are described in a companion paper.

PMID:37392020 | DOI:10.1089/AID.2022.0150

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Suicide in a Colombian indigenous community: Beyond mental illness

Int J Soc Psychiatry. 2023 Jun 30:207640231183922. doi: 10.1177/00207640231183922. Online ahead of print.

ABSTRACT

BACKGROUND: Among the causes associated with suicide there are social factors such as forced displacement has been described and health factors in general that have an impact on pediatric mental health.

AIMS: To describe clinical and psychosocial factors, and their relationship with suicidal behavior in a Colombian indigenous community.

PARTICIPANTS AND SETTING: The mean age were 9.23 years old, 53.7% male and 46.3% female.

METHOD: Mixed approach study. A thematic analysis was carried out with the youth of the community to investigate emotional aspects. A descriptive cross-sectional study was carried out and correlations between variables were made.

RESULTS: Correlations were found between suicidal behavior and medical findings. When comparing the mental health disorders and nutritional problems, statistically significant differences were found in the Suicide Risk domain (<.001). This was reaffirmed in the thematic analysis, where factors such as migration and difficulty understanding the language are highlighted as related to suicidal behavior in the pediatric population.

CONCLUSIONS: Suicidal behavior should not be approached solely from psychopathology. Hunger, the weakening of one’s own culture, armed conflict, migration, and other clinical conditions are found to be associated with suicidal behavior.

PMID:37392003 | DOI:10.1177/00207640231183922

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A Hospital Based Observational Study to Detect Non-Alcoholic Steatohepatitis by Acoustic Radiation Force Impulse in Individuals with Diabetes Mellitus and Metabolic Syndrome

Mymensingh Med J. 2023 Jul;32(3):847-854.

ABSTRACT

Non-alcoholic fatty liver disease (NAFLD)/ non-alcoholic steatohepatitis (NASH) is a rising epidemic with a potential for life threatening complications, especially in individuals with diabetes mellitus (DM) and metabolic syndrome. Though liver biopsy remains the recommended gold standard for diagnosing liver fibrosis, due to its technical feasibility and requirement of trained personnel, methods to develop non-invasive diagnostic tools for liver fibrosis have recently been underway. One such non-invasive method to diagnose liver fibrosis, point shear wave elastography using Acoustic Radiation Force Impulse (ARFI)-Imaging has gained remarkable results. This research was carried out to assess non-alcoholic steatohepatitis by acoustic radiation force impulse in individuals with diabetes and metabolic syndrome. Between March 2020 and October 2021, 140 patients with DM and metabolic syndrome, were identified. Demographic profile as well as reports of complete blood count, liver function tests, renal function tests, serum lipid profile, fasting blood sugar and postprandial blood sugar of the study participants were collected and recorded. Point shear wave liver elastography using ARFI imaging was performed for each of the study participant. NAFLD fibrosis score was determined in all of the study participants using appropriate software. Continuous and categorical variables were expressed as mean ± standard deviation and percentages respectively. Two-sided p values were considered as statistically significant at p value <0.05. Chi square test was done to see the association of clinical symptoms with fibrosis or non fibrosis. Independent t test was done to compare test variables and lab parameters between fibrosis and no fibrosis. Among the 140 study participants, 83 were males (59.29%) and 57 were (40.71%) females. On analysing the mean velocities measured by using ARFI elastography,30 participants (21.43%) had mean velocities >2.2m/s suggesting the presence of liver fibrosis and 110(78.57%) participants had mean velocities <2.2m/s did not have fibrosis. Among 83 males, 20(24.1%) had fibrosis and among 57 females, 10(17.5%) had fibrosis (p>0.05). Mean age of the ‘Fibrosis’ group was 54.53 (SD12.42) and that of the ‘No fibrosis’ group was 56.20(SD 11.76). Majority of the participants were between 56 and 65 years of age (50 participants). The mean height, weight and BMI of the ‘Fibrosis’ group was 152.84(±41.29), 73.33(±8.41), and 27.37(±2.73) respectively and that of the ‘No fibrosis’ group was 157.31(26.47), 70.89(12.46) and, 27.10(4.22) respectively (p>0.05). In the ‘Fibrosis’ group, majority (60%) were in the Obese 1 group and in the ‘No fibrosis’ group as well, majority were in the Obese 1 group (47.3%) (p=0.286). The mean (±SD) NAFLD- fibrosis Score was -1.54±1.06 in the ‘No fibrosis’ group and -0.61±1.81 in the ‘Fibrosis’ group (p value=0.012). There was no significant difference between fasting blood sugar, postprandial blood sugar, triglyceride and HbA1c levels among the ‘Fibrosis’ and ‘No Fibrosis’ groups. Among the 2 groups, there was no statistically significant difference between waist circumference, presence of hypertension, dyslipidaemia or other co-morbidities, in our study. None of the 30 individuals in the ‘Fibrosis’ group were on insulin (p=0.032), showing a significant difference in insulin usage among the 2 groups. There were significantly higher mean values of NAFLD-Fibrosis score in the individuals with fibrosis as compared to those with no fibrosis (p<0.05). NAFLD, diabetes mellitus and metabolic syndrome are part of the same spectrum. Individuals with diabetes mellitus and metabolic syndrome have a higher risk of developing liver fibrosis. Though in our study, parameters such as age, gender, hypertension, deranged blood sugars and lipid profile values were not significantly associated with liver fibrosis, NAFLD fibrosis score was found to have a significant association with liver fibrosis in these individuals.

PMID:37391984

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Dexmedetomidine as an Adjuvant to Bupivacaine in Caudal Analgesia in Children Undergoing Infra-Umbilical Surgery

Mymensingh Med J. 2023 Jul;32(3):833-840.

ABSTRACT

When performing infra-umbilical procedures, caudal epidural analgesia with bupivacaine is frequently used to provide both intra- and post-operative analgesia. Dexmedetomidine, an alpha 2 agonistsare extensively used in neuraxial blocks and peripheral nerve blocks to prolong the action of bupivacaine. To find out the effects of dexmedetomidine as an adjuvant to bupivacaine for caudal analgesia in children undergoing infra-umbilical surgery. This was a randomized, controlled double-blinded prospective observational study and was performed from July 2019 to December 2019. A total of 60 (Sixty) patients with different infra-umbilical surgical problems underwent different procedure under caudal anaesthesia in different operation theatre in Bangabandhu Sheikh Mujib Medical University, Dhaka were enrolled in this study. Elaborate personal history, meticulous clinical examinations and relevant laboratory investigations was done. Post-operative adverse effects also were monitored. All information from history of illness, clinical, laboratory findings, duration of analgesia and post-operative adverse effects were recorded in a preformed data sheet (Appendix-I) and statistical analysis was done by SPSS 22.0. Mean age of the children in Group A (dexmedetomidine + bupivacaine) was 5.50±2.61 years and in Group B (bupivacaine) was 5.66±2.75. Mean weight of the children in Group A was 19.22±8.58 kg and in Group B was 19.70±8.94 kg in this study. Mean duration of anaesthesia was 27.5±6.5 minute in Group A and 28.5±5.5 minute in Group B. The mean duration of analgesia was 4.32±0.54 hours for Group A and 2.12±0.32 hours in Group B. In Group A, 46.7% patients required 1 and 3.3% required 2 rescue analgesic but in Group B, 43.3% patients required single rescue analgesic and 33.3% required two rescue analgesics (p<0.05). In Group A, 6.7% patients had nausea/ vomiting and in Group B, 16.7% patients had nausea/ vomiting (p>0.05). It can be concluded that dexmedetomidine with bupivacaine for caudal analgesia in infra-umbilical surgery significantly prolongs the duration of postoperative analgesia when compared to bupivacaine alone without any side-effects.

PMID:37391982

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Ocular Involvement in Transfusion Dependent Thalassemia Children

Mymensingh Med J. 2023 Jul;32(3):807-811.

ABSTRACT

Thalassemia is one of the most common haemoglobinopathies in the world. Transfusion dependent thalassemia patients need regular blood transfusion. Repeated blood transfusions lead to iron overloads which can affect various organs in the body including eyes. The present study aims to evaluate the ocular involvements in transfusion dependent thalassemia children and their relationship with duration of the disease and serum ferritin level. This cross-sectional observational study included 46 multi-transfused thalassemia children aged 3-18 years. Detailed ophthalmological examination including visual acuity, slit lamp bio microscopy, direct and indirect ophthalmoscopy was done. Statistical analysis was done using SPSS version (IBM) 23.0. Student’s t-test and chi-square (χ²) test was done and p value of <0.05 was considered significant. Out of 46 thalassemia children male were 25(54.3%) and female were 21(45.7%). Mean age of the children was 8.94±5.04 years, mean duration of disease was 7.02±3.5 years and mean serum ferritin level 1543.68±914.43ng/dl. Ocular involvements were detected in 19(41.3%) children. Among them 8(17.39%) children had more than one ocular involvements. The ocular manifestations were decreased visual acuity in 17(36.95%), corneal dryness in 7(15.21%), lens opacity in 6(13.04%), optic disc atrophy in 7(15.21%), peripheral retinal pigmentation in 5(10.86%) and retinal vessels tortuosity in 3(6.52%) children. Higher serum ferritin level and increased duration of the disease were significantly (p<0.001) related with ocular involvement. Various ocular involvements were found in transfusion dependent thalassemia children. Therefore, transfusion dependent thalassemia children should be screened periodically for early detection and proper management of ocular changes.

PMID:37391978

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Comparison of Serum Phosphorus Level among Women with Preeclampsia and Normal Pregnancy

Mymensingh Med J. 2023 Jul;32(3):769-772.

ABSTRACT

Pregnancy is a physiological state. During pregnancy increased physiological changes may lead to many biochemical and anatomical alterations. The biochemical changes that seen in blood of the pregnant mother are exaggerated in various complications of pregnancy like preeclampsia. Preeclampsia is a dangerous complication that may leads to maternal and neonatal mortality. Globally it affects 3.0-5.0% of pregnant women. The study was done to analyze the changes in serum phosphorus level in pre-eclamsia compared with normal pregnancy. The study was cross sectional and was performed from July 2016 to June 2017 in the department of Biochemistry, Mymensingh Medical College, Mymensingh, Bangladesh. Total 100 subjects were included in this study. Among them 50 preeclamptic patients were taken as case and another 50 normal pregnant women were taken as control. Statistical difference was calculated by Student’s unpaired ‘t’ test. Biochemical values were expressed as mean±SD. The mean±SD of serum phosphorus levels in case and control group were 2.81±0.79 and 3.40±0.87mg/dl respectively. The difference in mean±SD of serum phosphorus were highly significant (p<0.001) when compared between case and control.

PMID:37391972

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Phlebectomy versus Sclerotherapy in Varicose Vein Patients: A Comparative Study

Mymensingh Med J. 2023 Jul;32(3):743-748.

ABSTRACT

Varicose veins are part of the spectrum of chronic venous disease and include spider telangiectasias, reticular veins, and true varicosities. It may present without advanced signs of chronic venous insufficiency. Sclerotherapy is a treatment choice for patients with varicose veins of lower extremity; it uses the intravenous injection of chemical drugs to achieve the goal of inflammatory occlusion. Phlebectomy, a minimally invasive procedure usually used for higher diameter of varicose veins at the surface of the skin. Objective of the study was to compare the outcome of Phlebectomy and Sclerotherapy in varicose vein patients. It was a quasi experimental study was conducted in the Department of Vascular Surgery in Bangabandhu Sheikh Mujib Medical University (BSMMU), Dhaka during the period of June 2019 to May 2020. Patients admitted with varicose vein and varicosity of the lower limbs with valves and perforator incompetence in the Department of Vascular Surgery, BSMMU, Dhaka, Bangladesh. During this period 60 patients were selected purposive randomly. Patients were divided to 30 patients were treated with Phlebectomy (Group I) 30 patients were treated with Sclerotherapy (Group II). Data were collected according to the pre-designed semi-structured data collection sheet. After editing data analysis were carried out by using the Statistical Package for Social Science (SPSS) version 22.0 Windows software. This study shows average age 40.73±15.50 years in Phlebectomy (Group I) and 38.43±11.08 years in Sclerotherapy (Group II). Males are more commonly involved than females between two groups which was 76.7% in Phlebectomy (Group I) and 70.0% in Sclerotherapy (Group II). The change CEAP improved to 93.3% in patients who underwent phlebectomy when compared to 83.3% in patients who underwent sclerotherapy. During the follow-up with duplex at treated veins showed 93.3% complete occlusion of treated veins in the phlebectomy group, while only 70.0% of the patients in the sclerotherapy group showed evidence of complete occlusion. In phlebectomy group recurrence of leg varicosities were found 6.7% of the patients, while 26.7% of the patients in the sclerotherapy group. The difference was statistically significant between two groups (p=0.038). This study shows phlebectomy to be much better option than sclerotherapy for the treatment of varicose veins and hence can be used routinely. Both phlebectomy and sclerotherapy not only revealed minimal time taken for return to normal activity but also proved to be safer with regard to complications.

PMID:37391968

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Physical, Psychological and Social Impact of COVID-19 Pandemic on Healthcare Workers at a COVID Designated Bangladeshi Public Hospital

Mymensingh Med J. 2023 Jul;32(3):732-742.

ABSTRACT

The world has been devastated facing the outbreak of a novel infectious disease known as Corona virus disease (COVID-19). This has been declared as a pandemic by the World Health Organization. The frontline health care workers, who are directly involved in the diagnosis, treatment and care of patients with COVID-19, are taking significant personal risks on their own health and those of their family members. Objectives of the study include establishing the physical, psychological and social impact experience by the healthcare workers serving in public hospitals of Bangladesh. This prospective cross-sectional observational study was carried out at Kuwait Bangladesh Friendship Government Hospital, the first Covid-19 designated hospital of Bangladesh between the 1st June and the 31st August, 2020. A total of 294 doctors, nurses, ward boys and ailed healthcare workers were included in this study via purposive sampling. The study found statistically significant (p value 0.024) difference of medical co-morbidities between Covid-19 positive and Covid-19 negative groups of health care professionals. Significant association was found between duration of work and presence during aerosol generating procedure with COVID infectivity of the study subjects. 72.8% respondents experienced public fear of contracting the virus from them and 69.0% noticed negative attitude of the society towards them. Eighty five percent (85.0%) did not get any community support during this pandemic crisis. The health care professionals engaged in COVID-19 treatment have been taking significant personal risk on their life in terms of physical, psychological and social perspective. Providing safeguard to the health care workers are integral components of public health measures for addressing the COVID-19 pandemic. Special interventions to promote their physical wellbeing and arrangement of adequate psychological training need to be immediately implemented to cope up this critical situation.

PMID:37391967