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Nevin Manimala Statistics

Effectiveness of an Active Methodology for Learning ECG during the Internal Medicine Internship

Arq Bras Cardiol. 2022 Oct;119(5 suppl 1):22-26. doi: 10.36660/abc.20220446.

ABSTRACT

BACKGROUND: Studies have shown a low accuracy of urgent care physicians in interpreting electrocardiogram (ECG) in severe cardiovascular conditions.

OBJECTIVE: To evaluate the effectiveness of an ECG learning method in internal medicine internships and to know the perception of interns regarding learning before and after the methodology.

METHODS: This study used a database with the results of an ECG pre- and post-test of the classes in the internal medicine internship from 2017 to 2022. A qualitative questionnaire was sent with questions for self-assessment of perception of learning.

RESULTS: The study included a total of 227 students, 161 of whom (70.9%) were female. The mean age was 26.4 ± 4.2 years old. The pre-test mean was 3.75 ± 2.0 points, and the post-test mean was 8.48 ± 1.5 points, showing a statistically significant difference, even after stratification by sex, age, and course period (p < 0.001 for all comparisons). Sixty-nine (30%) of the students responded to the qualitative questionnaire. The three predominant feelings prior to learning were despair, fear, and insecurity. After the Club, the predominant feelings were security, tranquility, and confidence.

CONCLUSION: The level of prior knowledge regarding ECG was low among students in the medical internship, and the proposed methodology was effective for learning ECG, regardless of age, sex, or course period. It was possible to transform negative beliefs regarding ECG learning and make learning meaningful and enjoyable. A more incisive look at medical courses for learning the ECG in a more practical and contextualized way can improve this scenario.

PMID:36449955 | DOI:10.36660/abc.20220446

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Teaching of Clinical Reasoning Guided by Illness Script Theory

Arq Bras Cardiol. 2022 Oct;119(5 suppl 1):14-21. doi: 10.36660/abc.20220419.

ABSTRACT

BACKGROUND: Teaching of clinical reasoning (CR) can be facilitated by educational strategies guided by illness script theory.

OBJECTIVE: To evaluate the effects of an educational strategy guided by illness script theory on the diagnostic accuracy of chest pain in medical students.

METHODS: Experimental study in 3 phases, with 18 third-year medical students completing phase 3. Phases 1 and 2 had 27 students. In phase 1, each participant solved 8 clinical cases (6 of chest pain and 2 distractors). In phase 2, participants were divided into 2 groups, which distinctly trained 3 of the chest pain diagnoses from phase 1. In phase 3, after 1 week, each participant solved 8 new cases, with the same diagnoses as phase 1. Case resolution time and diagnostic accuracy were evaluated. The significance level adopted for statistical analysis was p < 0.05.

RESULTS: In phase 3, both groups showed improved diagnostic accuracy and reduced case resolution time for the trained diagnoses, with no transfer of learning. For these diagnoses, the diagnostic accuracy scores in phases 1 and 3 were: group 1 = 1.00, IQR [0.00 to 1.00] versus 2.00, IQR [2.00 to 2.50], p = 0.017 and group 2 = 1.00, IQR [0.66 to 1.17] versus 3.00, IQR [1.33 to 3.00], p = 0.006. Case resolution times in seconds were: group 1: 485, IQR [450 to 583] versus 318, IQR [284 to 418], p = 0.027 and group 2: 655, IQR [543 to 740] versus 408, IQR [337 to 569], p = 0.010.

CONCLUSION: The proposed strategy seems to contribute to improved diagnostic accuracy, and it may be considered for teaching CR.

PMID:36449954 | DOI:10.36660/abc.20220419

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Preoperative risk factors associated with anastomotic leakage after colectomy for colorectal cancer: a systematic review and meta-analysis

Rev Col Bras Cir. 2022 Nov 28;49:e20223363. doi: 10.1590/0100-6991e-20223363-en. eCollection 2022.

ABSTRACT

INTRODUCTION: anastomotic leak (AL) after colectomy for colorectal cancer (CRC) is a life-threatening complication. This systematic review and meta-analysis aimed to evaluate the preoperative risk factors for AL in patients submitted to colectomy.

METHODS: the bibliographic search covered 15 years and 9 months, from 1st January 2005 to 19th October 2020 and was performed using PubMed, Cochrane Library, Scopus, Biblioteca Virtual em Saúde, Europe PMC and Web of Science databases. The inclusion criteria were cross-sectional, cohort and case-control studies on preoperative risk factors for AL (outcome). The Newcastle-Ottawa scale was used for bias assessment within studies. Meta-analysis involved the calculation of treatment effects for each individual study including odds ratio (OR), relative risk (RR) and 95% confidence intervals (95% CI) with construction of a random-effects model to evaluate the impact of each variable on the outcome. Statistical significance was set at p<0.05.

RESULTS: cross-sectional studies were represented by 39 articles, cohort studies by 21 articles and case-control by 4 articles. Meta-analysis identified 14 main risk factors for AL in CRC patients after colectomy, namely male sex (RR=1.56; 95% CI=1.40-1.75), smoking (RR=1.48; 95% CI=1.30-1.69), alcohol consumption (RR=1.35; 95% CI=1.21-1.52), diabetes mellitus (RR=1.97; 95% CI=1.44-2.70), lung diseases (RR=2.14; 95% CI=1.21-3.78), chronic obstructive pulmonary disease (RR=1.10; 95% IC=1.04-1.16), coronary artery disease (RR=1.61; 95% CI=1.07-2.41), chronic kidney disease (RR=1.34; 95% CI=1.22-1.47), high ASA grades (RR=1.70; 95% CI=1.37-2.09), previous abdominal surgery (RR=1.30; 95% CI=1.04-1.64), CRC-related emergency surgery (RR=1.61; 95% CI=1.26-2.07), neoadjuvant chemotherapy (RR=2.16; 95% CI=1.17-4.02), radiotherapy (RR=2.36; 95% CI=1.33-4.19) and chemoradiotherapy (RR=1.58; 95% CI=1.06-2.35).

CONCLUSIONS: important preoperative risk factors for colorectal AL in CRC patients have been identified based on best evidence-based research, and such knowledge should influence decisions regarding treatment.

PMID:36449942 | DOI:10.1590/0100-6991e-20223363-en

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The role of autopsy on the diagnosis of missed injuries and on the trauma quality program goal definitions: study of 192 cases

Rev Col Bras Cir. 2022 Nov 28;49:e20223319. doi: 10.1590/0100-6991e-20223319_en. eCollection 2022.

ABSTRACT

OBJECTIVE: to assess the role of autopsy in the diagnosis of missed injuries (MI) and definition of trauma quality program goals.

METHOD: Retrospective analysis of autopsy reports and patient’s charts. Injuries present in the autopsy, but not in the chart, were defined as “missed”. MI were characterized using Goldman’s criteria: Class I, if the diagnosis would have modified the management and outcome; Class II, if it would have modified the management, but not the outcome; Class III, if it would not have modified neither the management nor the outcome. We used Mann-Whitney’s U and Pearson’s chi square for statistical analysis, considering p<0.05 as significant.

RESULTS: We included 192 patients, with mean age of 56.8 years. Blunt trauma accounted for 181 cases, and 28.6% were due to falls from the same level. MI were diagnosed in 39 patients (20.3%). Using Goldman’s criteria, MI were categorized as Class I in 3 (1.6%) and Class II in 11 (5.6%). MI were more often diagnosed in the thoracic segment (25 patients, 64.1% of the MI). The variables significantly associated (p<0.05) to MI were: time of hospitalization < 48 h, severe trauma mechanism, and not undergoing surgery or computed tomography. At autopsy, the values of ISS and NISS were higher in patients with MI.

CONCLUSION: the review of the autopsy report allowed diagnosis of MIs, which did not influence outcome in their majority. Many opportunities of improvement in quality of care were identified.

PMID:36449941 | DOI:10.1590/0100-6991e-20223319_en

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Web-Based Health Information-Seeking Methods and Time Since Provider Engagement: Cross-sectional Study

JMIR Form Res. 2022 Nov 30;6(11):e42126. doi: 10.2196/42126.

ABSTRACT

BACKGROUND: The use of web-based methods to seek health information is increasing in popularity. As web-based health information (WHI)-seeking affects health-related decision support and chronic symptom self-management, WHI-seeking from online sources may impact health care decisions and outcomes, including care-seeking decisions. Patients who are routinely connected to physicians are more likely to receive better and more consistent care. Little is known about whether WHI-seeking impacts the frequency at which patients engage with health care providers.

OBJECTIVE: Our primary objective was to describe the associations between the use of web-based methods to seek information about one’s own health and the time since last engaging with a health care provider about one’s own health. Additionally, we aimed to assess participants’ trust in health care organizations to contextualize our findings.

METHODS: We analyzed data from US adults participating in the nationally representative Tufts Equity in Health, Wealth, and Civic Engagement Survey (N=1034). Bivariate associations between demographic characteristics and health information-seeking methods were assessed with Pearson chi-squared tests. Bivariate associations of Medical Mistrust Index (MMI) scores with each health information-seeking method and time since provider engagement were assessed with F tests and adjusted Wald tests. We fit a multivariable logistic regression model to assess the association between WHI-seeking within the 12 months prior to survey (alone or in combination with provider-based methods versus provider only) and engagement with a provider more than 1 year prior to the time of survey, adjusting for age, race and ethnicity, sex, education, insurance coverage, and MMI.

RESULTS: Age, race and ethnicity, educational attainment, health insurance source, MMI, and time since provider engagement were each significantly associated with the health information-seeking method in bivariate analyses. Compared to using only provider-based health information seeking methods, WHI-based methods alone or in combination with provider-based methods were associated with a 51% lower likelihood (odds ratio 0.49, 95% CI 0.27-0.87) of engaging with a provider within the previous year. Participants who used WHI-seeking methods alone and those who had not engaged with a health care provider within the previous year demonstrated a higher mean MMI score; however, MMI was not a significant predictor of time since engagement with a provider in the multivariable analysis.

CONCLUSIONS: Our findings from a nationally representative survey suggest that for those who use WHI-seeking methods (alone or in combination with provider-based information-seeking methods), there is a statistically significant lower likelihood of engaging with a provider in a year compared to those who only use provider-based methods. Future research should consider the intent of a person’s visit with a provider, trust in health care systems, methods of provider engagement, and specific web-based platforms for health information.

PMID:36449328 | DOI:10.2196/42126

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An efficient method to predict protein thermostability in alanine mutation

Phys Chem Chem Phys. 2022 Nov 30. doi: 10.1039/d2cp04236c. Online ahead of print.

ABSTRACT

The relationship between protein sequence and its thermodynamic stability is a critical aspect of computational protein design. In this work, we present a new theoretical method to calculate the free energy change (ΔΔG) resulting from a single-point amino acid mutation to alanine in a protein sequence. The method is derived based on physical interactions and is very efficient in estimating the free energy changes caused by a series of alanine mutations from just a single molecular dynamics (MD) trajectory. Numerical calculations are carried out on a total of 547 alanine mutations in 19 diverse proteins whose experimental results are available. The comparison between the experimental ΔΔGexp and the calculated values shows a generally good correlation with a correlation coefficient of 0.67. Both the advantages and limitations of this method are discussed. This method provides an efficient and valuable tool for protein design and engineering.

PMID:36449314 | DOI:10.1039/d2cp04236c

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Indirect evaluation of amyloid deposition by ultrasonography and its relationship with MEFV gene mutation in FMF patients

J Clin Ultrasound. 2022 Nov 30. doi: 10.1002/jcu.23409. Online ahead of print.

ABSTRACT

OBJECTIVE: The most significant complication in familial mediterranean fever (FMF) patients is dysfunction and organ failure developing depending on amyloid deposition in organs. The golden standard for showing amyloid deposition is the biopsy; however, tissue stiffness was examined by shear wave elastography as a non-invasive method in a restricted number of studies conducted, and it is considered that amyloid deposition can be shown indirectly. In our study, we aimed to indirectly evaluate amyloid deposition in organs with Shear wave and Doppler ultrasonography and to reveal its relationship with MEFV gene mutation analysis.

METHOD: 42 FMF patients with normal thyroid and renal function tests and 35 participants with no FMF symptoms were included in our study. FMF patients were grouped depending on their MEFV mutation analyses. Thyroid, salivary glands, and renal parenchymal tissue stiffness were evaluated by shear wave elastography. Thyroidal artery and both renal artery resistances were evaluated by Doppler ultrasonography.

RESULTS: Both parotis gland, thyroid and renal parenchymal stiffness and arterial vascular resistances in the patient group were found higher than the control group. A significant difference was not found in any parameters in classification based on gender. Tissue stiffness and vascular resistance values in the patient group with M694V homozygote mutation were found statistically significantly higher than the other mutation groups (p < 0.001).

CONCLUSION: Our study shows that identifying genetic mutation type in FMF patients will help determine possibly amyloidosis risk. Imaging of tissue stiffness by shear wave elastography and evaluation of vascular resistance by Doppler can be useful for routine screening of those patients.

PMID:36449313 | DOI:10.1002/jcu.23409

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Examining the Treatment Relevance of the Approach-Avoidance Motivation Model for Sexual Interest/Arousal Disorder in Women and Non-Binary Individuals

J Sex Res. 2022 Nov 30:1-12. doi: 10.1080/00224499.2022.2148240. Online ahead of print.

ABSTRACT

Up to 8% of cisgender women meet diagnostic criteria for Female Sexual Interest/Arousal Disorder (SIAD), a diagnosis in the Diagnostic and Statistical Manual of Mental Disorders, yet treatment research for SIAD remains scarce, particularly for transgender women and non-binary individuals. The treatment relevance of the Approach-Avoidance Motivation Model for SIAD was tested in a sample of cis- and transgender women, and non-binary individuals, who either met criteria for SIAD (n = 45) or reported no sexual concerns (n = 76). Participants completed an online writing exercise previously found to increase the salience of approach or avoidance sexual motivation, or a control writing task. At baseline, and 72 hours following the writing task, they completed measures of sexual motivation, sexual desire, and partnered sexual behaviors. Participants with SIAD in the approach condition significantly increased in approach sexual motivation immediately following the manipulation but these improvements were not maintained 72 hours later. Compared to baseline, participants who wrote about an approach-motivated sexual encounter experienced a decrease in sexual desire and partnered sexual behaviors, while participants who wrote about an avoidance-motivated sexual encounter had decreased motivation but increased partnered sexual behaviors 72 hours following the manipulation. Overall, findings did not show support for the relevance of the approach-avoidance motivation manipulation for SIAD. Future studies might explore novel ways of targeting sexual motivation to address sexual difficulties.

PMID:36449295 | DOI:10.1080/00224499.2022.2148240

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Development of a Clinical Prediction Model for 1-Year Mortality in Patients With Advanced Cancer

JAMA Netw Open. 2022 Nov 1;5(11):e2244350. doi: 10.1001/jamanetworkopen.2022.44350.

ABSTRACT

IMPORTANCE: To optimize palliative care in patients with cancer who are in their last year of life, timely and accurate prognostication is needed. However, available instruments for prognostication, such as the surprise question (“Would I be surprised if this patient died in the next year?”) and various prediction models using clinical variables, are not well validated or lack discriminative ability.

OBJECTIVE: To develop and validate a prediction model to calculate the 1-year risk of death among patients with advanced cancer.

DESIGN, SETTING, AND PARTICIPANTS: This multicenter prospective prognostic study was performed in the general oncology inpatient and outpatient clinics of 6 hospitals in the Netherlands. A total of 867 patients were enrolled between June 2 and November 22, 2017, and followed up for 1 year. The primary analyses were performed from October 9 to 25, 2019, with the most recent analyses performed from June 19 to 22, 2022. Cox proportional hazards regression analysis was used to develop a prediction model including 3 categories of candidate predictors: clinician responses to the surprise question, patient clinical characteristics, and patient laboratory values. Data on race and ethnicity were not collected because most patients were expected to be of White race and Dutch ethnicity, and race and ethnicity were not considered as prognostic factors. The models’ discriminative ability was assessed using internal-external validation by study hospital and measured using the C statistic. Patients 18 years and older with locally advanced or metastatic cancer were eligible. Patients with hematologic cancer were excluded.

MAIN OUTCOMES AND MEASURES: The risk of death by 1 year.

RESULTS: Among 867 patients, the median age was 66 years (IQR, 56-72 years), and 411 individuals (47.4%) were male. The 1-year mortality rate was 41.6% (361 patients). Three prediction models with increasing complexity were developed: (1) a simple model including the surprise question, (2) a clinical model including the surprise question and clinical characteristics (age, cancer type prognosis, visceral metastases, brain metastases, Eastern Cooperative Oncology Group performance status, weight loss, pain, and dyspnea), and (3) an extended model including the surprise question, clinical characteristics, and laboratory values (hemoglobin, C-reactive protein, and serum albumin). The pooled C statistic was 0.69 (95% CI, 0.67-0.71) for the simple model, 0.76 (95% CI, 0.73-0.78) for the clinical model, and 0.78 (95% CI, 0.76-0.80) for the extended model. A nomogram and web-based calculator were developed to support clinicians in adequately caring for patients with advanced cancer.

CONCLUSIONS AND RELEVANCE: In this study, a prediction model including the surprise question, clinical characteristics, and laboratory values had better discriminative ability in predicting death among patients with advanced cancer than models including the surprise question, clinical characteristics, or laboratory values alone. The nomogram and web-based calculator developed for this study can be used by clinicians to identify patients who may benefit from palliative care and advance care planning. Further exploration of the feasibility and external validity of the model is needed.

PMID:36449290 | DOI:10.1001/jamanetworkopen.2022.44350

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Running addiction

J Sports Med Phys Fitness. 2022 Nov 30. doi: 10.23736/S0022-4707.22.14285-4. Online ahead of print.

ABSTRACT

BACKGROUND: Running is a common physical activity of an aerobic nature that is carried out mostly outdoors and presents a healthy lifestyle. However, the positive effect of running often masks the downsides of potential addiction that can compromise an individual’s physical, mental, and social functioning. Most often there is a thin and unclear line separating passionate athletes and running addicts. Thus, it is necessary to educate the running community to raise awareness of the negative effects of over-training, prevent complications and injuries and to seek the necessary help.

METHODS: The study sample consisted of runners from the Croatian population of both genders, aged 18 to 75, who have been running for more than a year. The respondents were divided into groups according to the favorite length of the racing race. Groups were compared in terms of nutritional supplements usage, running-related injuries, as well as the impact of Covid-19 pandemic on their running volume. Difference between groups in Exercise Addiction Inventory (EAI) questionnaire outcome scores was also accessed.

RESULTS: The statistical analysis included the answers of 644 people of both genders, among which 309 (48%) men and 335 (52%) women. The average age of the respondents was 42 years (18-75), and the average age of running was 5 years (1-42). Only among the respondents who started running most recently (1 to 10 years), and those who run the longest races (longer than 100 km) were found to use nutritional supplements significantly more (71.43%, P<0.001) and sustained injuries associated with running more than rest of the groups (100%, P=0.013). Due to the pandemic, only respondents who have been running for the longest time (31-42 years) and prefer to run races from 21 to 42 km significantly reduced the amount of training (75%, P=0.037). The risk for addiction was significantly positively associated with the use of dietary supplements, the favorite length of the race and the frequency of injuries, while there was no association with the length of running.

CONCLUSIONS: Running is a high-risk sport for addiction development. All the benevolent attitudes and positive effects of running often mask the downsides of addiction that can compromise an individual and his or her physical, mental, and social functioning. Due to the high percentage of addiction risk of 25%, it is necessary to educate the racing community to raise awareness of the negative effects of overtraining, prevent complications and seek the necessary help.

PMID:36449271 | DOI:10.23736/S0022-4707.22.14285-4