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1.
J Urol ; : 101097JU0000000000003981, 2024 Apr 25.
Artículo en Inglés | MEDLINE | ID: mdl-38661067

RESUMEN

PURPOSE: Although representing approximately 25% of patients diagnosed with bladder cancer, muscle-invasive bladder cancer (MIBC) carries a significant risk of death that has not significantly changed in decades. Increasingly, clinicians and patients recognize the importance of multidisciplinary collaborative efforts that take into account survival and quality of life concerns. This guideline provides a risk-stratified, clinical framework for the management of muscle-invasive urothelial bladder cancer. METHODOLOGY/METHODS: In 2024, the MIBC guideline was updated through the AUA amendment process in which newly published literature is reviewed and integrated into previously published guidelines in an effort to maintain currency. The amendment allowed for the incorporation of additional literature released since the previous 2020 amendment. The updated search gathered literature from May 2020 to November 2023. This review identified 3739 abstracts, of which 46 met inclusion criteria.When sufficient evidence existed, the body of evidence was assigned a strength rating of A (high), B (moderate), or C (low) for support of Strong, Moderate, or Conditional Recommendations. In the absence of sufficient evidence, additional information is provided as Clinical Principles and Expert Opinions. RESULTS: Updates were made regarding neoadjuvant/adjuvant chemotherapy, radical cystectomy, pelvic lymphadenectomy, multi-modal bladder preserving therapy, and future directions. Further revisions were made to the methodology and reference sections as appropriate. CONCLUSIONS: This guideline seeks to improve clinicians' ability to evaluate and treat patients with MIBC based on currently available evidence. Future studies will be essential to further support or refine these statements to improve patient care.

2.
J Urol ; 211(4): 533-538, 2024 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-38265030

RESUMEN

PURPOSE: The purpose of this American Urological Association (AUA)/Society of Urologic Oncology (SUO) guideline amendment is to provide a useful reference on the effective evidence-based treatment strategies for non-muscle invasive bladder cancer (NMIBC). MATERIALS AND METHODS: In 2023, the NMIBC guideline was updated through the AUA amendment process in which newly published literature is reviewed and integrated into previously published guidelines in an effort to maintain currency. The amendment allowed for the incorporation of additional literature released since the previous 2020 amendment. The updated search gathered literature from July 2019 to May 2023. This review identified 1918 abstracts, of which 75 met inclusion criteria.When sufficient evidence existed, the body of evidence was assigned a strength rating of A (high), B (moderate), or C (low) in support of Strong, Moderate, or Conditional Recommendations. In the absence of sufficient evidence, additional information is provided as Clinical Principles and Expert Opinions. RESULTS: Updates were made to statements on variant histologies, urine markers after diagnosis of bladder cancer, intravesical therapy, BCG maintenance, enhanced cystoscopy, and future directions. Further revisions were made to the methodology and reference sections as appropriate. CONCLUSIONS: This guideline seeks to improve clinicians' ability to evaluate and treat patients with NMIBC based on currently available evidence. Future studies will be essential to further support or refine these statements to improve patient care.


Asunto(s)
Neoplasias Vesicales sin Invasión Muscular , Neoplasias de la Vejiga Urinaria , Urología , Humanos , Neoplasias de la Vejiga Urinaria/diagnóstico , Neoplasias de la Vejiga Urinaria/terapia , Cistoscopía , Resultado del Tratamiento
3.
Cancer Causes Control ; 35(2): 193-201, 2024 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-37783893

RESUMEN

PURPOSE: American Indian/Alaska Native (AI/AN) populations experience significantly higher incidence and mortality rates of cervical cancer. The objective of this systematic scoping review is to characterize the volume and nature of research being conducted specific to the AI/AN population regarding cervical cancer and related clinical themes. METHODS: This scoping review was conducted in collaboration with the Pacific Northwest Evidence-based Practice Center. Search strategies identified eligible publications from 1990 through 4 February 2022. Two reviewers independently abstracted study data, including clinical area, number of participants and percent inclusion of AI/AN, intervention or risk factor, outcomes reported, Indian Health Service (IHS) Region, and funding source. We used published algorithms to assess study design. RESULTS: Database searches identified 300 unique citations. After full-text evaluation of 129 articles, 78 studies and 9 secondary publications were included (total of 87). Approximately 74% of studies were observational in design, with cross-sectional methodology accounting for 42.7% of all included studies. The most common clinical theme was cervical cancer screening. The most common intervention/exposure was risk factor, typically race (AI/AN compared with other groups) (69%). For studies with documented funding sources, 67% were funded by the US Government. CONCLUSION: Of the small number of publications identified, the majority are funded through government agencies, are descriptive and/or cross-sectional studies that are hypothesis generating in nature, and fail to represent the diversity of the AI/AN populations in the US. This systematic scoping review highlights the paucity of rigorous research being conducted in a population suffering from a greater burden of disease.


Asunto(s)
Indio Americano o Nativo de Alaska , Disparidades en el Estado de Salud , Neoplasias del Cuello Uterino , Femenino , Humanos , Detección Precoz del Cáncer , Incidencia , Estados Unidos/epidemiología , Neoplasias del Cuello Uterino/epidemiología
4.
PLoS One ; 17(10): e0275789, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-36227875

RESUMEN

BACKGROUND: Tuberculosis preventive treatment (TPT) is strongly recommended for children following infection with Mycobacterium tuberculosis because of their high risk of progression to active tuberculosis, including severe disseminated disease. We describe the implementation of TPT for children and adolescents with evidence of tuberculosis infection (TBI) at Victoria's largest children's hospital and examine factors affecting treatment completion. METHODS: We conducted a retrospective clinical audit of all children and adolescents aged <18 years diagnosed with latent TBI at the Royal Children's Hospital, Melbourne, between 2010 and 2016 inclusive. The primary outcome was treatment completion, defined as completing TPT to within one month of a target duration for the specified regimen (for instance, at least five months of a six-month isoniazid course), confirmed by the treating clinician. Factors associated with treatment adherence were evaluated by univariate and multivariate analysis. RESULTS: Of 402 participants with TBI, 296 (74%) met the criteria for treatment "complete". The most common TPT regimen was six months of daily isoniazid (377, 94%). On multivariate logistic regression analysis, treatment completion was more likely among children and adolescents who had refugee health screening performed (OR 2.31, 95%CI 1.34-4.00) or who were also treated for other medical conditions (OR 1.67 95%CI 1.0-2.85), and less likely among those who experienced side-effects (OR 0.32, 95%CI 0.11-0.94). However, TPT was generally well tolerated with side-effects reported in 15 participants (3.7%). CONCLUSION: Identification of factors associated with TPT completion and deficiencies in the existing care pathway have informed service provision changes to further improve outcomes for Victorian children and adolescents with TBI.


Asunto(s)
Efectos Colaterales y Reacciones Adversas Relacionados con Medicamentos , Tuberculosis Latente , Tuberculosis Ganglionar , Adolescente , Antituberculosos/uso terapéutico , Niño , Auditoría Clínica , Efectos Colaterales y Reacciones Adversas Relacionados con Medicamentos/tratamiento farmacológico , Humanos , Isoniazida , Tuberculosis Latente/tratamiento farmacológico , Estudios Retrospectivos , Tuberculosis Ganglionar/tratamiento farmacológico
5.
J Urol ; 208(3): 536-541, 2022 09.
Artículo en Inglés | MEDLINE | ID: mdl-35942788

RESUMEN

PURPOSE: In 2019 the American Urological Association (AUA) released the evidence-based guideline "Recurrent Uncomplicated Urinary Tract Infections in Women: AUA/CUA/SUFU Guideline." Information supporting the guideline came from a 2019 systematic evidence review prepared for the AUA by the Pacific Northwest Evidence-based Practice Center (EPC). The AUA used evidence found for 11 Key Questions (Appendix C) in the EPC's report to derive 16 Guideline Statements. In 2021 the EPC conducted an Update Literature Review (ULR) assessing abstracts from new studies published since the 2019 systematic review. The AUA asked the EPC to further assess a subset of studies included in the ULR report, to support potential changes to the 2019 guideline. MATERIALS/METHODS: A systematic-review utilized research from the Oregon Health & Science University. Pacific Northwest EPC was used to update the 2019 AUA Guideline on rUTI in women with new evidence published through 2021. RESULTS: Updates were made to reflect changes in literature since 2019. Updates include recent publications on antibiotic prophylaxis, non-antibiotic prophylaxis, and estrogen therapy. CONCLUSION: The presence of rUTI is crucial to the health of patients and its effects must be considered for the welfare of society. This document will undergo updating as the knowledge regarding current treatments and future treatment options continues to expand. .


Asunto(s)
Infecciones Urinarias , Femenino , Humanos , Oregon , Proteínas Represoras , Estados Unidos , Infecciones Urinarias/diagnóstico , Infecciones Urinarias/prevención & control
6.
Ann Intern Med ; 175(9): 1285-1297, 2022 09.
Artículo en Inglés | MEDLINE | ID: mdl-35878405

RESUMEN

BACKGROUND: Telehealth strategies to supplement or replace in-person maternity care may affect maternal health outcomes. PURPOSE: To conduct a rapid review of the effectiveness and harms of telehealth strategies for maternal health care given the recent expansion of telehealth arising from the COVID-19 pandemic, and to produce an evidence map. DATA SOURCES: Systematic searches of MEDLINE, the Cochrane Library, CINAHL, Embase, and Scopus for English-language studies (January 2015 to April 2022). STUDY SELECTION: Randomized controlled trials (RCTs) and observational studies of maternal care telehealth strategies versus usual care. DATA EXTRACTION: Dual data extraction and risk-of-bias assessment of studies, with disagreements resolved through consensus. DATA SYNTHESIS: 28 RCTs and 14 observational studies (n = 44 894) were included. Maternal telehealth interventions supplemented in-person care for most studies of mental health and diabetes during pregnancy, primarily resulting in similar, and sometimes better, clinical and patient-reported outcomes versus usual care. Supplementing in-person mental health care with phone- or web-based platforms or mobile applications resulted in similar or better mental health outcomes versus in-person care. A reduced-visit prenatal care schedule using telehealth to replace in-person general maternity care for low-risk pregnancies resulted in similar clinical outcomes and higher patient satisfaction versus usual care. Overall, telehealth strategies were heterogeneous and resulted in similar obstetric and patient satisfaction outcomes. Few studies addressed disparities, health equity, or harms. LIMITATIONS: Interventions varied, and evidence was inadequate for some clinical outcomes. CONCLUSION: Replacing or supplementing in-person maternal care with telehealth generally results in similar, and sometimes better, clinical outcomes and patient satisfaction compared with in-person care. The effect on access to care, health equity, and harms is unclear. PRIMARY FUNDING SOURCE: Patient-Centered Outcomes Research Institute. (PROSPERO: CRD42021276347).


Asunto(s)
COVID-19 , Obstetricia , Telemedicina , COVID-19/epidemiología , Femenino , Humanos , Salud Materna , Embarazo , Atención Prenatal/métodos , Telemedicina/métodos
7.
8.
Chemosphere ; 277: 130355, 2021 08.
Artículo en Inglés | MEDLINE | ID: mdl-34381285

RESUMEN

Bisphenol A (BPA)-free plastic products are widely available. Transient BPA release has been reported in Tritan drinking bottles. This study assessed the effectiveness of common consumer washing methods in removing BPA contamination in Tritan bottles using both ELISA and HPLC-MS/MS assays. BPA release was detected in 2 out of 10 kinds of Tritan drinking bottles tested. Average BPA level was 0.493 µg/L in water samples from a type of Tritan kid drinking bottle following 24-hour incubation at room temperature, corresponding to a release rate of 0.015 ng/cm2/h. Of the common consumer cleaning methods identified in an informal survey, dishwashing was the most effective method that significantly reduced, even eliminated BPA release from the tested BPA-positive Tritan bottles, while rinsing with water and handwashing with soap and water were ineffective. The bioactivity of the leached BPA was confirmed using a rodent cardiac myocyte acute exposure model and an invertebrate 7-day exposure model. The BPA release is possibly the result of surface contamination in the manufacturing process. As a case study, our result may be informative for general consumer practice and for better quality control by the manufactures.


Asunto(s)
Compuestos de Bencidrilo , Espectrometría de Masas en Tándem , Fenoles , Plásticos
9.
F S Rep ; 2(2): 181-188, 2021 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-34278352

RESUMEN

OBJECTIVE: To evaluate the impact of an electronic witnessing system (EWS) on witnessing standard operating procedures and to assess embryologist perceptions of the EWS. DESIGN: Prospective cohort study. SETTING: Private in vitro fertilization laboratory network. PATIENTS: None. INTERVENTIONS: None. MAIN OUTCOME MEASURES: The time difference between manual and electronic double-witnessing procedures, and embryologist perceptions of the EWS. RESULTS: From 342 witnessing times analyzed (114 EWS, 114 manual, and 114 interruptions to witnesses), the EWS reduced mean (SD) total witnessing time (in seconds) by 91.5 (23.6) for intracytoplasmic sperm injection, 62.0 (17.9) for Day 3 embryo assessment, 58.3 (18.9) for fresh embryo transfer, and 59.4 (13.3) for frozen embryo transfer. This time reduction significantly decreased the overall time required for double-witnessing by 3.1- to 5.2-fold. A survey with 50 embryologists within the laboratory network indicated that most embryologists considered the EWS to improve sample traceability (78.3%), reduce errors in labeling issues (80.4%), and reduce the risk of sample mismatch errors by minimizing disruptions (60.9%). Furthermore, 82.6% thought that visual completion of the EWS dashboard provided peace of mind when leaving work and 84.8% were more confident knowing that all procedures were completed according to the EWS. CONCLUSIONS: An EWS can improve laboratory efficiency by significantly decreasing the time required for witnessing procedures and by minimizing interruptions. The EWS was well perceived by embryologists and laboratory managers and enhanced their confidence and peace of mind with regard to witnessing compliance and safety/accuracy.

10.
BMJ Open ; 11(2): e042823, 2021 02 05.
Artículo en Inglés | MEDLINE | ID: mdl-33550254

RESUMEN

INTRODUCTION: Dementia prevalence continues to increase, and effective interventions are needed to prevent, delay or slow its progression. Higher adherence to the Mediterranean diet (MedDiet) and increased physical activity (PA) have been proposed as strategies to facilitate healthy brain ageing and reduce dementia risk. However, to date, there have been no dementia prevention trials in the UK focussed on combined dietary and PA interventions. This study aims to: (1) assess feasibility and acceptability of a theory-underpinned digital and group-based intervention for dementia risk reduction in an 'at risk' UK cohort; (2) evaluate behaviour change responses to the intervention; and, (3) provide information on cognitive, neurological, vascular and physiological outcomes to inform the design of a follow-on, full-scale efficacy trial. METHODS: One hundred and eight participants aged 55 to 74 years with a QRISK2 score of ≥10% will be recruited to take part in this 24-week multi-site study. Participants will be randomised into three parallel arms: (1) Control; (2) MedDiet; and, (3) MedDiet+PA. The study will evaluate a personalised website, group session and food delivery intervention to increase MedDiet adherence and PA in older adults at risk of dementia. Diet and PA will be monitored prior to, during and following the intervention. Feasibility, acceptability and hypothesised mediators will be assessed in addition to measures of cognitive function, brain structure/perfusion (MRI), vascular function and metabolic markers (blood, urine and faecal) prior to, and following, the intervention. DISCUSSION: This trial will provide insights into the feasibility, acceptability and mechanism of effect of a multi-domain intervention focussed on the MedDiet alone and PA for dementia risk reduction in an 'at risk' UK cohort. ETHICS AND DISSEMINATION: The study has received NHS REC and HRA approval (18/NI/0191). Findings will be disseminated via conference presentations, public lectures, and peer-reviewed publications. TRIAL REGISTRATION DETAILS: ClinicalTrials.gov NCT03673722.


Asunto(s)
Demencia , Dieta Mediterránea , Anciano , Demencia/prevención & control , Ejercicio Físico , Estudios de Factibilidad , Humanos , Persona de Mediana Edad , Ensayos Clínicos Controlados Aleatorios como Asunto , Reino Unido
11.
JAMA ; 324(23): 2423-2436, 2020 12 15.
Artículo en Inglés | MEDLINE | ID: mdl-33320229

RESUMEN

Importance: A 2014 review for the US Preventive Services Task Force (USPSTF) found antiviral therapy for hepatitis B virus (HBV) infection associated with improved intermediate outcomes, although evidence on clinical outcomes was limited. Objective: To update the 2014 HBV screening review in nonpregnant adolescents and adults to inform the USPSTF. Data Sources: Cochrane Central Register of Controlled Trials, the Cochrane Database of Systematic Reviews, and Ovid MEDLINE (2014 to August 2019); with surveillance through July 24, 2020. Study Selection: Randomized clinical trials (RCTs) on screening and antiviral therapy; cohort studies on screening, antiviral therapy clinical outcomes, and the association between achieving intermediate outcomes after antiviral therapy and clinical outcomes. Data Extraction and Synthesis: One investigator abstracted data; a second investigator checked accuracy. Two investigators independently assessed study quality. Random-effects profile likelihood meta-analysis was performed. Results: Thirty trials and 20 cohort studies, with a total of 94 168 participants, were included. No study directly evaluated the effects of screening for HBV infection vs no screening on clinical outcomes such as mortality, hepatocellular carcinoma, or cirrhosis. Screening strategies that focused on risk factors such as ever having immigrated from high-prevalence countries and demographic and behavioral risk factors would identify nearly all HBV infection cases. In 1 study (n = 21 008), only screening immigrants from high-prevalence countries would miss approximately two-thirds of infected persons. Based on 18 trials (n = 2972), antiviral therapy compared with placebo or no treatment was associated with greater likelihood of achieving intermediate outcomes, such as virologic suppression and hepatitis B e-antigen (HBeAg) or hepatitis B surface antigen loss or seroconversion; the numbers needed to treat ranged from 2.6 for virologic suppression to 17 for HBeAg seroconversion. Based on 12 trials (n = 4127), first-line antiviral therapies were at least as likely as nonpreferred therapies to achieve intermediate outcomes. Based on 16 trials (n = 4809), antiviral therapy might be associated with improved clinical outcomes, but data were sparse and imprecise. Nine cohort studies (n = 3893) indicated an association between achieving an intermediate outcome following antiviral therapy and improved clinical outcomes but were heterogeneous (hazard ratios ranged from 0.07 to 0.87). Antiviral therapy was associated with higher risk of withdrawal due to adverse events vs placebo or no antiviral therapy. Conclusions and Relevance: There was no direct evidence for the clinical benefits and harms of HBV screening vs no screening. Antiviral therapy for HBV infection was associated with improved intermediate outcomes and may improve clinical outcomes.


Asunto(s)
Antígenos de Superficie de la Hepatitis B/sangre , Virus de la Hepatitis B , Hepatitis B Crónica/diagnóstico , Tamizaje Masivo/normas , Adolescente , Adulto , Antivirales/uso terapéutico , Emigrantes e Inmigrantes , Virus de la Hepatitis B/inmunología , Hepatitis B Crónica/tratamiento farmacológico , Humanos , Tamizaje Masivo/efectos adversos , Guías de Práctica Clínica como Asunto , Factores de Riesgo
12.
JAMA ; 322(7): 666-685, 2019 08 20.
Artículo en Inglés | MEDLINE | ID: mdl-31429902

RESUMEN

Importance: Pathogenic mutations in breast cancer susceptibility genes BRCA1 and BRCA2 increase risks for breast, ovarian, fallopian tube, and peritoneal cancer in women; interventions reduce risk in mutation carriers. Objective: To update the 2013 US Preventive Services Task Force review on benefits and harms of risk assessment, genetic counseling, and genetic testing for BRCA1/2-related cancer in women. Data Sources: Cochrane libraries; MEDLINE, PsycINFO, EMBASE (January 1, 2013, to March 6, 2019, for updates; January 1, 1994, to March 6, 2019, for new key questions and populations); reference lists. Study Selection: Discriminatory accuracy studies, randomized clinical trials (RCTs), and observational studies of women without recently diagnosed BRCA1/2-related cancer. Data Extraction and Synthesis: Data on study methods, setting, population characteristics, eligibility criteria, interventions, numbers enrolled and lost to follow-up, outcome ascertainment, and results were abstracted. Two reviewers independently assessed study quality. Main Outcomes and Measures: Cancer incidence and mortality; discriminatory accuracy of risk assessment tools for BRCA1/2 mutations; benefits and harms of risk assessment, genetic counseling, genetic testing, and risk-reducing interventions. Results: For this review, 103 studies (110 articles; N = 92 712) were included. No studies evaluated the effectiveness of risk assessment, genetic counseling, and genetic testing in reducing incidence and mortality of BRCA1/2-related cancer. Fourteen studies (n = 43 813) of 8 risk assessment tools to guide referrals to genetic counseling demonstrated moderate to high accuracy (area under the receiver operating characteristic curve, 0.68-0.96). Twenty-eight studies (n = 8060) indicated that genetic counseling was associated with reduced breast cancer worry, anxiety, and depression; increased understanding of risk; and decreased intention for testing. Twenty studies (n = 4322) showed that breast cancer worry and anxiety were higher after testing for women with positive results and lower for others; understanding of risk was higher after testing. In 8 RCTs (n = 54 651), tamoxifen (relative risk [RR], 0.69 [95% CI, 0.59-0.84]; 4 trials), raloxifene (RR, 0.44 [95% CI, 0.24-0.80]; 2 trials), and aromatase inhibitors (RR, 0.45 [95% CI, 0.26-0.70]; 2 trials) were associated with lower risks of invasive breast cancer compared with placebo; results were not specific to mutation carriers. Mastectomy was associated with 90% to 100% reduction in breast cancer incidence (6 studies; n = 2546) and 81% to 100% reduction in breast cancer mortality (1 study; n = 639); oophorectomy was associated with 69% to 100% reduction in ovarian cancer (2 studies; n = 2108); complications were common with mastectomy. Conclusions and Relevance: Among women without recently diagnosed BRCA1/2-related cancer, the benefits and harms of risk assessment, genetic counseling, and genetic testing to reduce cancer incidence and mortality have not been directly evaluated by current research.


Asunto(s)
Neoplasias de la Mama/genética , Genes BRCA1 , Genes BRCA2 , Asesoramiento Genético , Pruebas Genéticas , Mutación , Neoplasias Ováricas/genética , Neoplasias de la Mama/prevención & control , Neoplasias de las Trompas Uterinas/genética , Neoplasias de las Trompas Uterinas/prevención & control , Femenino , Predisposición Genética a la Enfermedad , Humanos , Neoplasias Ováricas/prevención & control , Neoplasias Peritoneales/genética , Neoplasias Peritoneales/prevención & control , Medición de Riesgo
13.
Int Urogynecol J ; 30(10): 1603-1617, 2019 10.
Artículo en Inglés | MEDLINE | ID: mdl-31346670

RESUMEN

INTRODUCTION: Overactive bladder (OAB) is a common condition, increasing with age and affecting quality of life. While numerous OAB drugs are available, persistence is low. We evaluated evidence published since 2012 to determine if newer drugs provided better efficacy and harm profiles. METHODS: We searched MEDLINE and the Cochrane Library from 2012 to September 2018 using terms for included drugs and requested information from manufacturers of included drugs. We performed dual review of all systematic review processes, evaluated study quality, and conducted meta-analyses using random effects models. RESULTS: In addition to 31 older studies, we included 20 trials published since 2012 (N = 16,478; 4 good, 11 fair, and 5 poor quality). Where statistical differences were found, they were clinically small (reductions of < 0.5 episodes/day). Solifenacin plus mirabegron improved efficacy outcomes over monotherapy with either drug, but significantly increased constipation compared with solifenacin and dry mouth compared with mirabegron. Solifenacin reduced incontinence over mirabegron and tolterodine and urgency episodes over tolterodine. Mirabegron did not differ from tolterodine in efficacy but had significantly lower incidence of dry mouth than solifenacin or tolterodine. Fesoterodine showed significant improvements but also anticholinergic effects vs. tolterodine. Oxybutynin, solifenacin, and tolterodine had similar efficacy, but dry mouth led to greater discontinuation with oxybutynin. Blurred vision, cardiac arrhythmia, and dizziness were uncommon. CONCLUSION: New evidence confirms small, but clinically uncertain, differences among monotherapies and also between combination and monotherapy, regardless of statistical significance. While drugs mainly differed in incidence of dry mouth or constipation, none provided improved efficacy without increased harms.


Asunto(s)
Vejiga Urinaria Hiperactiva/tratamiento farmacológico , Agentes Urológicos/uso terapéutico , Humanos , Ensayos Clínicos Controlados Aleatorios como Asunto
14.
Appl Opt ; 58(4): 814-825, 2019 Feb 01.
Artículo en Inglés | MEDLINE | ID: mdl-30874125

RESUMEN

The extremely low-resource optical identifier (ELROI) is a concept for an autonomous, low-power optical "license plate" that can be attached to anything that goes into space. ELROI uses short, omnidirectional flashes of laser light to encode a unique ID number that can be read by a small ground telescope using a photon-counting sensor and innovative extreme background-rejection techniques. ELROI is smaller and lighter than a typical radio beacon, low-power enough to run on its own small solar cell, and can safely operate for the entire orbital lifetime of a satellite or debris object. The concept has been validated in ground tests, and orbital prototypes are scheduled for launch in 2018 and beyond. In this paper, we focus on the details of the encoding scheme and data analysis that allow a milliwatt optical signal to be read from orbit. We describe the techniques of extreme background-rejection needed to achieve this, including spectral filtering and temporal filtering using a period- and phase-recovery algorithm, and discuss the requirements for an error-correcting code to encode the ID number. Worked examples with both simulated and experimental (long-range ground test) data illustrate the methods used. We present these techniques to describe a new optical communication concept, and to encourage others to consider observing and analyzing our upcoming test flights.

16.
J Child Neurol ; 34(5): 237-247, 2019 04.
Artículo en Inglés | MEDLINE | ID: mdl-30674203

RESUMEN

Sleep problems are common in children, especially those with neurodevelopmental disorders, and can lead to consequences in behavior, functioning, and quality of life. We systematically reviewed the efficacy and harms of pharmacologic treatments for sleep disorders in children and adolescents. We searched MEDLINE, Cochrane library databases, and PsycINFO through June 2018. We included 22 placebo-controlled randomized controlled trials (1-13 weeks' duration), involving 1758 children (mean age 8.2 years). Single randomized controlled trials of zolpidem and eszopiclone in children with attention-deficit/hyperactivity disorder (ADHD) showed no improvement in sleep or ADHD ratings. Clinical Global Impression Improvement/Severity scores significantly improved with zolpidem ( P = .03 and P = .006, respectively). A single, small randomized controlled trial of diphenhydramine reported small improvements in sleep outcomes (8-10 minutes' better sleep latency and duration) after 1 week. In 19 randomized controlled trials, melatonin significantly improved sleep latency (median 28 minutes; range 11-51 minutes), sleep duration (median 33 minutes; range 14-68 minutes), and wake time after sleep onset (range 12-43 minutes), but not number of awakenings per night (range 0-2.7). Function and behavior improvement varied. Improvement in sleep was greatest in children with autism or other neurodevelopmental disorders, and smaller in adolescents and children with chronic delayed sleep onset. Adverse events were infrequent with melatonin, but more frequent than placebo in children taking eszopiclone or zolpidem. These findings show that melatonin was useful in improving some sleep outcomes in the short term, particularly those with comorbid ASD and neurodevelopmental disorders. Other drugs and outcomes are inadequately studied.


Asunto(s)
Trastornos del Sueño-Vigilia/tratamiento farmacológico , Adolescente , Niño , Humanos , Trastornos del Neurodesarrollo/complicaciones , Trastornos del Neurodesarrollo/tratamiento farmacológico , Ensayos Clínicos Controlados Aleatorios como Asunto , Trastornos del Sueño-Vigilia/complicaciones
17.
Diabetes Obes Metab ; 21(4): 984-992, 2019 04.
Artículo en Inglés | MEDLINE | ID: mdl-30552792

RESUMEN

AIM: To review evidence comparing benefits and harms of long-acting insulins in patients with type 1 and 2 diabetes. METHODS: MEDLINE and two Cochrane databases were searched during February 2018. Two authors selected studies meeting inclusion criteria and assessed their quality. Comparative studies of adult or paediatric patients with diabetes treated with insulin degludec, detemir or glargine were included. Meta-analysis was used to combine results of similar studies, and the I2 statistic calculated to assess statistical heterogeneity. RESULTS: Of 2534 citations reviewed, 70 studies met the inclusion criteria. No statistically significant differences in HbA1c were seen between any two insulins or formulations. Hypoglycaemia was less probable with degludec than with glargine, including nocturnal hypoglycaemia in type 1 (rate ratio 0.68, 95% CI 0.56-0.81) and type 2 diabetes (rate ratio 0.73, 95% CI 0.65-0.82), and severe hypoglycaemia in type 2 diabetes (relative risk 0.72, 95% CI 0.54-0.96). Patients with type 2 diabetes had higher rates of withdrawal because of adverse events when treated with detemir compared with glargine (relative risk 2.1, 95% CI 1.4-3.3). Adults taking detemir gained about 1 kg less body weight than those taking degludec (type 1) or glargine (type 2). CONCLUSIONS: No differences in glycaemic control were seen between insulin degludec, detemir and glargine. Hypoglycaemia was less probable with degludec than glargine, and patients taking detemir gained less body weight than those given degludec or glargine. In type 2 diabetes, withdrawals as a result of adverse events were more probable with detemir than glargine.


Asunto(s)
Diabetes Mellitus Tipo 1/tratamiento farmacológico , Diabetes Mellitus Tipo 2/tratamiento farmacológico , Hipoglucemia/inducido químicamente , Insulina de Acción Prolongada/uso terapéutico , Aumento de Peso , Glucemia/metabolismo , Investigación sobre la Eficacia Comparativa , Diabetes Mellitus Tipo 1/metabolismo , Diabetes Mellitus Tipo 2/metabolismo , Hemoglobina Glucada/metabolismo , Humanos , Insulina Detemir/uso terapéutico , Insulina Glargina/uso terapéutico , Resultado del Tratamiento
18.
Vision Res ; 140: 33-43, 2017 11.
Artículo en Inglés | MEDLINE | ID: mdl-28803949

RESUMEN

Temporal summation is an important feature of the visual system which combines visual signals that arrive at different times. Previous research estimated complete summation to last for 100ms for stimuli judged "just detectable." We measured the full range of temporal summation for much weaker stimuli using a new paradigm and a novel light source, developed in the field of quantum optics for generating small numbers of photons with precise timing characteristics and reduced variance in photon number. Dark-adapted participants judged whether a light was presented to the left or right of their fixation in each trial. In Experiment 1, stimuli contained a stream of photons delivered at a constant rate while the duration was systematically varied. Accuracy should increase with duration as long as the later photons can be integrated with the proceeding ones into a single signal. The temporal integration window was estimated as the point that performance no longer improved, and was found to be 650ms on average. In Experiment 2, the duration of the visual stimuli was kept short (100ms or <30ms) while the number of photons was varied to explore the efficiency of summation over the integration window compared to Experiment 1. There was some indication that temporal summation remains efficient over the integration window, although there is variation between individuals. The relatively long integration window measured in this study may be relevant to studies of the absolute visual threshold, i.e., tests of single-photon vision, where "single" photons should be separated by greater than the integration window to avoid summation.


Asunto(s)
Adaptación a la Oscuridad/fisiología , Luz , Fotones , Sumación de Potenciales Postsinápticos/fisiología , Percepción Visual/fisiología , Adulto , Femenino , Fijación Ocular/fisiología , Humanos , Masculino , Umbral Sensorial , Adulto Joven
19.
Inflamm Bowel Dis ; 23(3): 461-472, 2017 03.
Artículo en Inglés | MEDLINE | ID: mdl-28146003

RESUMEN

BACKGROUND: Induction treatment of mild-to-moderate Crohn's disease is controversial. PURPOSE: To compare the induction of remission between different doses of mesalamine, sulfasalazine, corticosteroids, and budesonide for active Crohn's disease. DATA SOURCES: We identified randomized controlled trials from existing Cochrane reviews and an updated literature search in Medline, EMBASE, and CENTRAL to November 2015. STUDY SELECTION: We included randomized controlled trials (n = 22) in adult patients with Crohn's disease that compared budesonide, sulfasalazine, mesalamine, or corticosteroids with placebo or each other, for the induction of remission (8-17 wks). Mesalamine (above and below 2.4 g/d) and budesonide (above and below 6 mg/d) were stratified into low and high doses. DATA EXTRACTION: Our primary outcome was remission, defined as a Crohn's Disease Activity Index score <150. A Bayesian random-effects network meta-analysis was performed on the proportion in remission. DATA SYNTHESIS: Corticosteroids (odds ratio [OR] = 3.80; 95% credible interval [CrI]: 2.48-5.66), high-dose budesonide (OR = 2.96; 95% CrI: 2.06-4.30), and high-dose mesalamine (OR = 2.29; 95% CrI: 1.58-3.33) were superior to placebo. Corticosteroids were similar to high-dose budesonide (OR = 1.21; 95% CrI: 0.84-1.76), but more effective than high-dose mesalamine (OR = 1.83; 95% CrI: 1.16-2.88). Sulfasalazine was not significantly superior to any therapy including placebo. LIMITATIONS: Randomized controlled trials that use a strict definition of induction of remission and disease severity at enrollment to assess effectiveness in treating mild-to-moderate Crohn's disease are limited. CONCLUSIONS: Corticosteroids and high-dose budesonide were effective treatments for inducing remission in mild-to-moderate Crohn's disease. High-dose mesalamine is an option among patients preferring to avoid steroids.


Asunto(s)
Corticoesteroides/uso terapéutico , Antiinflamatorios/uso terapéutico , Budesonida/uso terapéutico , Enfermedad de Crohn/tratamiento farmacológico , Mesalamina/uso terapéutico , Sulfasalazina/uso terapéutico , Teorema de Bayes , Investigación sobre la Eficacia Comparativa , Humanos , Quimioterapia de Inducción/métodos , Metaanálisis en Red , Oportunidad Relativa , Ensayos Clínicos Controlados Aleatorios como Asunto , Resultado del Tratamiento
20.
Inflamm Bowel Dis ; 23(5): E26-E37, 2017 05 01.
Artículo en Inglés | MEDLINE | ID: mdl-30052985

RESUMEN

Background: Induction treatment of mild-to-moderate Crohn's disease is controversial. Purpose: To compare the induction of remission between different doses of mesalamine, sulfasalazine, corticosteroids, and budesonide for active Crohn's disease. Data sources: We identified randomized controlled trials from existing Cochrane reviews and an updated literature search in Medline, EMBASE, and CENTRAL to November 2015. Study selection: We included randomized controlled trials (n = 22) in adult patients with Crohn's disease that compared budesonide, sulfasalazine, mesalamine, or corticosteroids with placebo or each other, for the induction of remission (8-17 wks). Mesalamine (above and below 2.4 g/d) and budesonide (above and below 6 mg/d) were stratified into low and high doses. Data extraction: Our primary outcome was remission, defined as a Crohn's Disease Activity Index score <150. A Bayesian random-effects network meta-analysis was performed on the proportion in remission. Data synthesis: Corticosteroids (odds ratio [OR] = 3.64; 95% credible interval [CrI]: 2.16-6.19), high-dose budesonide (OR = 2.99; 95% CrI: 1.83-4.90), and high-dose mesalamine (OR = 1.87; 95% CrI: 1.14-3.15) were superior to placebo. Corticosteroids were similar to high-dose budesonide (OR = 1.21; 95% CrI: 0.79-1.89), but more effective than high-dose mesalamine (OR = 1.95; 95% CrI: 1.14-3.25). Sulfasalazine was not significantly superior to any therapy including placebo. Limitations: Randomized controlled trials that use a strict definition of induction of remission and disease severity at enrollment to assess effectiveness in treating mild-to-moderate Crohn's disease are limited. Conclusions: Corticosteroids and high-dose budesonide were effective treatments for inducing remission in mild-to-moderate Crohn's disease. High-dose mesalamine maybe an option among patients preferring to avoid steroids.

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