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1.
Lancet ; 403(10423): 261-270, 2024 Jan 20.
Artículo en Inglés | MEDLINE | ID: mdl-38065194

RESUMEN

BACKGROUND: Adjuvant breast radiotherapy as a standard component of breast-conserving treatment for early cancer can overtreat many women. Breast MRI is the most sensitive modality to assess local tumour burden. The aim of this study was to determine whether a combination of MRI and pathology findings can identify women with truly localised breast cancer who can safely avoid radiotherapy. METHODS: PROSPECT is a prospective, multicentre, two-arm, non-randomised trial of radiotherapy omission in patients selected using preoperative MRI and postoperative tumour pathology. It is being conducted at four academic hospitals in Australia. Women aged 50 years or older with cT1N0 non-triple-negative breast cancer were eligible. Those with apparently unifocal cancer had breast-conserving surgery (BCS) and, if pT1N0 or N1mi, had radiotherapy omitted (group 1). Standard treatment including excision of MRI-detected additional cancers was offered to the others (group 2). All were recommended systemic therapy. The primary outcome was ipsilateral invasive recurrence rate (IIRR) at 5 years in group 1. Primary analysis occurred after the 100th group 1 patient reached 5 years follow-up. Quality-adjusted life-years (QALYs) and cost-effectiveness of the PROSPECT pathway were analysed. This study is registered with the Australian New Zealand Clinical Trials Registry (ACTRN12610000810011). FINDINGS: Between May 17, 2011, and May 6, 2019, 443 patients with breast cancer underwent MRI. Median age was 63·0 years. MRI detected 61 malignant occult lesions separate from the index cancer in 48 patients (11%). Of 201 group 1 patients who had BCS without radiotherapy, the IIRR at 5 years was 1·0% (upper 95% CI 5·4%). In group 1, one local recurrence occurred at 4·5 years and a second at 7·5 years. In group 2, nine patients had mastectomy (2% of total cohort), and the 5-year IIRR was 1·7% (upper 95% CI 6·1%). The only distant metastasis in the entire cohort was genetically distinct from the index cancer. The PROSPECT pathway increased QALYs by 0·019 (95% CI 0·008-0·029) and saved AU$1980 (95% CI 1396-2528) or £953 (672-1216) per patient. INTERPRETATION: PROSPECT suggests that women with unifocal breast cancer on MRI and favourable pathology can safely omit radiotherapy. FUNDING: Breast Cancer Trials, National Breast Cancer Foundation, Cancer Council Victoria, the Royal Melbourne Hospital Foundation, and the Breast Cancer Research Foundation.


Asunto(s)
Neoplasias de la Mama , Femenino , Humanos , Persona de Mediana Edad , Neoplasias de la Mama/diagnóstico por imagen , Neoplasias de la Mama/radioterapia , Neoplasias de la Mama/cirugía , Imagen por Resonancia Magnética , Mastectomía , Mastectomía Segmentaria/métodos , Recurrencia Local de Neoplasia/patología , Estadificación de Neoplasias , Estudios Prospectivos , Radioterapia Adyuvante , Victoria , Anciano
2.
J Neurosci Nurs ; 52(4): 172-178, 2020 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-32511172

RESUMEN

BACKGROUND: When tested in a controlled clinic environment, individuals with neuromuscular-related symptoms may complete motor tasks within normal predicted ranges. However, measuring activity at home may better reflect typical motor performance. The accuracy of accelerometry measurements in individuals with congenital muscular dystrophy (CMD) is unknown. We aimed to compare accelerometry and manual step counts and assess free-living physical activity intensity in individuals with CMD using accelerometry. METHODS: Ambulatory pediatric CMD participants (n = 9) performed the 6-minute walk test in clinic while wearing ActiGraph GT3X accelerometer devices. During the test, manual step counting was conducted to assess concurrent validity of the ActiGraph step count in this population using Bland-Altman analysis. In addition, activity intensity of 6 pediatric CMD participants was monitored at home with accelerometer devices for an average of 7 days. Cut-point values previously validated for neuromuscular disorders were used for data analysis. RESULTS: Bland-Altman and intraclass correlation analyses showed no concurrent validity between manual and ActiGraph-recorded step counts. Fewer steps were recorded by ActiGraph step counts compared with manual step counts (411 ± 74 vs 699 ± 43, respectively; P = .004). Although improved, results were in the same direction with the application of low-frequency extension filters (587 ± 40 vs 699 ± 43, P = .03). ActiGraph step-count data did not correlate with manual step count (Spearman ρ = 0.32, P = .41; with low-frequency extension: Spearman ρ = 0.45, P = .22). Seven-day physical activity monitoring showed that participants spent more than 80% of their time in the sedentary activity level. CONCLUSIONS: In a controlled clinic setting, step count was significantly lower by ActiGraph GT3X than by manual step counting, possibly because of the abnormal gait in this population. Additional studies using triaxial assessment are needed to validate accelerometry measurement of activity intensity in individuals with CMD. Accelerometry outcomes may provide valuable measures and complement the 6-minute walk test in the assessment of treatment efficacy in CMD.


Asunto(s)
Acelerometría/estadística & datos numéricos , Actividad Motora , Distrofias Musculares/congénito , Acelerometría/instrumentación , Adolescente , Niño , Femenino , Humanos , Masculino , Reproducibilidad de los Resultados
3.
Artículo en Inglés | MEDLINE | ID: mdl-31632738

RESUMEN

Study design: Pre-post, pilot study. Objectives: To characterize ventilatory (VE) responses to exercise following warm-up walking in individuals with chronic incomplete spinal cord injury (iSCI) during constant work rate (CWR) exercise. Secondarily, to investigate VE and tidal volume (VT) variability, and ratings of perceived exertion (RPE) before and after overground locomotor training (OLT). Setting: Research laboratory. Methods: A 6-min CWR walking bout at preferred pace was used as a warm-up followed by 6 min of rest and a second 6-min CWR bout at above preferred walking pace. The second CWR bout was analyzed. Breath-by-breath ventilatory data were examined using a curvilinear least squares fitting procedure with a mono-exponential model. VE and VT variability was calculated as the difference between the observed and predicted values and RPE was taken every 2 min. Results: Participants (n = 3, C4-C5) achieved a hyperpneic response to exercise in VE and VT. OLT resulted in faster ventilatory kinetics and reductions of 24 and 29% for VE and VT variability, respectively. A 30% reduction in RPE was concurrent with the reductions in ventilatory variability. Conclusions: OLT may improve ventilatory control during CWR in patients with cervical motor-iSCI. These data suggest that in some participants with iSCI, ventilation may influence RPE during walking. Future research should investigate mechanisms of ventilatory variability and its implications in walking performance in patients with iSCI.


Asunto(s)
Esfuerzo Físico/fisiología , Modalidades de Fisioterapia , Ventilación Pulmonar/fisiología , Traumatismos de la Médula Espinal/fisiopatología , Traumatismos de la Médula Espinal/rehabilitación , Adolescente , Adulto , Médula Cervical/lesiones , Humanos , Cinética , Consumo de Oxígeno/fisiología , Proyectos Piloto , Caminata , Adulto Joven
4.
Phys Ther ; 99(11): 1574-1579, 2019 11 25.
Artículo en Inglés | MEDLINE | ID: mdl-31365114

RESUMEN

Measures of clinical significance have been in use for several decades as a means of interpreting clinical findings and patient-reported outcomes. The most common of these measures is the minimal clinically important difference. With the rise in popularity of measurements of clinical significance, several common misconceptions have arisen that may impact their interpretation and application to clinical practice. The purpose of this article is to present a schema for understanding measurement of clinical significance and use this to highlight the reasons why misuse and misinterpretation have occurred. A new measure of clinical significance is then defined that is intended to be resistant to these issues. Clinical significance has long been a topic of importance to researchers looking to make their findings interpretable and has been quantified in diverse ways.1 Recently, there has been rapidly increasing interest in and use of an assortment of minimal (clinically) important difference measures. The range of their use is illustrated by the publications of reviews and meta-analyses in pain relief,2 cognitive interventions for dementia,3 and CT densitometry for patients with chronic obstructive pulmonary disease.4 Consensus has not been reached for how clinical significance should be defined. Despite this, current methods fall into 2 distinct approaches. The first estimates measurement error levels, and the other quantifies the ability of the instrument to predict clinical outcomes of interest. The conceptual differences between the 2 approaches have not been clearly delineated in the literature. Further, additional conceptual and practical issues exist for measures using the second approach because it has not previously been framed as a clinical prediction problem. It is the aim of this paper to develop a framework to guide researchers in the use of clinical importance measures and to introduce a new methodology for predicting clinically meaningful change. We first propose 2 types of clinical significance measures relating to what we call the Detection and Clinical Prediction Problems. Next, we discuss weaknesses of existing measures of clinical prediction within this unifying framework. Finally, we define a new measure of clinical significance using predictive values and demonstrate its use with simulated data.


Asunto(s)
Diferencia Mínima Clínicamente Importante , Medición de Resultados Informados por el Paciente , Humanos , Proyectos de Investigación
5.
BMC Geriatr ; 19(1): 146, 2019 05 27.
Artículo en Inglés | MEDLINE | ID: mdl-31133006

RESUMEN

BACKGROUND: Understanding the provision of health services to community-dwelling older adults is of great importance due to regulatory changes within post-acute care. The aim of this study was to illustrate pathways by which older adults, within an innovative post-acute care delivery model, move to either independence or re-admission back into higher levels of care to maximize the value of rehabilitation delivery. METHODS: Clinical data specific to an episode of care (n = 30,001) provided to Medicare beneficiaries treated via a rehabilitation house-calls model of care in their homes and senior living communites were separated into training and test sets. Classification trees were fit on the training set's administrative and clinical variables. Descriptive statistics were calculated for the overall sample, patient characteristics, clinical characteristics, and clinical outcomes. RESULTS: Subjects were 83.3 years on average, 69.4% were female, and 62.2% were seen in their own homes while 37.8% were in senior living. The key variables predictive of progressing to independence were total number of visits, the presence of the Patient Specific Functional Scale (PSFS), PSFS score at discharge and change in PSFS. Prediction accuracy of the classification tree on the test set was 82.4%. CONCLUSIONS: Older adults progress to a higher degree of independence, instead of higher levels of care, via several distinct pathways within a rehabilitation house-calls model of care. A mix of service utilization and outcome variables are key predictors of each pathway and may be used to maximize the value of service delivery. Further examination of the predictors of outcome using administrative datasets drawn from different sub-sets of older adults across the post-acute care continuum is warranted.


Asunto(s)
Medicare/tendencias , Alta del Paciente/tendencias , Rehabilitación/tendencias , Atención Subaguda/tendencias , Anciano , Anciano de 80 o más Años , Femenino , Humanos , Masculino , Valor Predictivo de las Pruebas , Pronóstico , Rehabilitación/métodos , Estudios Retrospectivos , Atención Subaguda/métodos , Resultado del Tratamiento , Estados Unidos/epidemiología
6.
Arch Phys Med Rehabil ; 100(10): 1888-1893, 2019 10.
Artículo en Inglés | MEDLINE | ID: mdl-31026461

RESUMEN

OBJECTIVE: To determine changes in balance and gait following a task-specific, performance-based training protocol for overground locomotor training (OLT) in individuals with motor-incomplete spinal cord injury (iSCI). DESIGN: Convenience sample, prepilot and postpilot study. SETTING: Human performance research laboratory. PARTICIPANTS: Adults (N=15; 12 men and 3 women; mean age [y] ± SD, 41.5±16.9), American Spinal Injury Association Impairment Scale C or D, >6 months post-spinal cord injury. INTERVENTIONS: Two 90-minute OLT sessions per week over 12 to 15 weeks. OLT sessions were built on 3 principles of motor learning: practice variability, task specificity, and progressive overload (movement complexity, resistance, velocity, volume). Training used only voluntary movements without body-weight support, robotics, electrical stimulation, or bracing. Subjects used ambulatory assistive devices as necessary. MAIN OUTCOME MEASURES: Berg Balance Scale (BBS), Spinal Cord Injury Functional Ambulation Inventory (SCI-FAI) gait parameters, spatiotemporal measures of gait (step length, step width, percent stance, stance:swing ratio) from 7 participants who walked across a pressure-sensitive walkway. RESULTS: Fourteen participants completed the OLT protocol and 1 participant completed 15 sessions due to scheduled surgery. The BBS scores showed a mean improvement of 4.53±4.09 (P<.001). SCI-FAI scores showed a mean increase of 2.47±3.44 (P=.01). Spatiotemporal measures of gait showed no significant changes. CONCLUSION: This pilot demonstrated improvements in balance and selected gait characteristics using a task-specific, performance-based OLT for chronic iSCI.


Asunto(s)
Trastornos Neurológicos de la Marcha/rehabilitación , Modalidades de Fisioterapia , Equilibrio Postural/fisiología , Traumatismos de la Médula Espinal/rehabilitación , Adulto , Anciano , Femenino , Trastornos Neurológicos de la Marcha/fisiopatología , Humanos , Masculino , Persona de Mediana Edad , Proyectos Piloto , Muestreo , Traumatismos de la Médula Espinal/fisiopatología , Adulto Joven
7.
J Cardiopulm Rehabil Prev ; 39(2): 118-126, 2019 03.
Artículo en Inglés | MEDLINE | ID: mdl-30624371

RESUMEN

BACKGROUND: Pulmonary arterial hypertension (PAH) is a chronic debilitating illness. The effects of vigorous aerobic exercise training (AET) on heart function in PAH are poorly understood. METHODS: Eighteen women with PAH (aged 56.2 ± 8.8 yr, body mass index: 28.8 ± 7.3 kg/m) underwent 10 wk of vigorous AET. Cardiac function was observed at rest and peak exercise using bioelectrical impedance cardiography before and after the AET. Cardiac function was observed in a small PAH subset (n = 7) for 10 wk before beginning the AET. A cohort of sedentary women (n = 19) served as healthy controls. RESULTS: Left ventricular ejection fraction (48 ± 9.2 vs 61.5 ± 13.3%, P = .034) and the systemic vascular resistance index (2258 ± 419.1 vs 2939 ± 962.4 dyn·sec/cm·m, P = .008) were lower at supine rest in the baseline PAH group versus the healthy group, as were peak exercise heart rate (140 ± 13.3 vs 170 ± 13.8 beats/min, P < .001) and systemic vascular resistance index (828 ± 141.1 vs 824 ± 300.9 dyn·sec/cm·m, P = .050) after controlling for age and heart rate. Systemic vascular resistance index measured at peak exercise decreased in the PAH group after AET (828 ± 141.1 vs 766 ± 139.6 dyn·sec/cm·m, P = .020). Left ventricular early diastolic filling ratio worsened in the PAH subset prior to AET (95.9 ± 19.4 vs 76.2 ± 18.9%, P = .043) and remained unchanged after AET. CONCLUSION: Vigorous AET was not associated with significant declines in left ventricular systolic or diastolic function in women with PAH. Aerobic exercise training may be beneficial for reducing afterload and may preserve left ventricular diastolic function.


Asunto(s)
Terapia por Ejercicio/métodos , Ejercicio Físico/fisiología , Hipertensión Arterial Pulmonar , Volumen Sistólico/fisiología , Resistencia Vascular/fisiología , Técnicas de Ejercicio con Movimientos/métodos , Femenino , Pruebas de Función Cardíaca/métodos , Humanos , Persona de Mediana Edad , Hipertensión Arterial Pulmonar/fisiopatología , Hipertensión Arterial Pulmonar/rehabilitación , Resultado del Tratamiento , Función Ventricular Izquierda/fisiología
8.
ANZ J Surg ; 2018 Jan 23.
Artículo en Inglés | MEDLINE | ID: mdl-29363225

RESUMEN

BACKGROUND: Adjuvant therapy for breast cancer is routinely discussed and recommended in multi-disciplinary meetings (MDMs). Current literature explores how treatments received by patients differ from national guidelines; however, it does not explore whether treatment is concordant with MDMs. This study provides an Australian perspective on the uptake of MDM recommendations and reasons for non-concordance. METHODS: A retrospective cohort study of patients with breast cancer presented at The Royal Melbourne Hospital MDM in 2010 and 2014 to investigate the concordance between MDM recommendations and treatment received. RESULTS: The study group comprised 441 patients (161 from 2010 and 280 from 2014). A total of 375 patients were included in the analyses. Overall, 82% of patients had perfect concordance between recommended and received treatment for all modes of adjuvant therapy. Concordance to endocrine therapy was higher for invasive cancers than ductal carcinoma in situ (97% versus 81%, P < 0.0001). Concordance to radiotherapy was high and did not differ according to type of cancer or surgery (ranging from 88 to 91%). Concordance to chemotherapy recommendations was high overall (92%) and did not vary with nodal status. Women aged over 65 years were least likely to be recommended for adjuvant therapy but most likely to concordant with the recommendation. CONCLUSIONS: Uptake of MDM-recommended treatments is high. There is a minority of patients in whom MDM recommendations are not followed, highlighting that there are extra steps between recommendations at an MDM and decisions with patients. More attention to this issue is appropriate, and the reasons for non-concordance warrant further study.

9.
Eur J Appl Physiol ; 117(10): 1989-2000, 2017 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-28744558

RESUMEN

PURPOSE: The purpose of the present study was to characterize hypothesized relationships among fatigability and cardiorespiratory fitness in individuals with chronic motor-incomplete SCI (iSCI) during treadmill walking. The theoretical framework was that exacerbated fatigability would occur concomitantly with diminished cardiorespiratory fitness in people with iSCI. METHODS: Subjects with iSCI (n = 8) and an able-bodied reference group (REF) (n = 8) completed a 6-min walking bout followed by a walking bout of 30-min or until volitional exhaustion, both at a self-selected walking speed. Fatigability was assessed using both perceived fatigability and performance fatigability measures. Pulmonary oxygen uptake kinetics (VO2 on-kinetics) was measured breath-by-breath and changes in deoxygenated hemoglobin/myoglobin concentration (∆[HHb]) of the lateral gastrocnemius was measured by near-infrared spectroscopy. Adjustment of VO2 and ∆[HHb] on-kinetics were modeled using a mono-exponential equation. RESULTS: Perceived fatigability and performance fatigability were 52% and 44% greater in the iSCI group compared to the REF group (p = 0.003 and p = 0.004). Phase II time constant (τp) of VO2 on-kinetics and ∆[HHb] ½ time during resting arterial occlusion were 55.4% and 16.3% slower in iSCI vs REF (p < 0.01 and p = 0.047, respectively). CONCLUSIONS: The results of the present study may suggest that compromised O2 delivery and/or utilization may have contributed to the severity of fatigability in these individuals with iSCI. The understanding of the extent to which fatigability and VO2 and Δ[HHb] on-kinetics impacts locomotion after iSCI will assist in the future development of targeted interventions to enhance function.


Asunto(s)
Tolerancia al Ejercicio , Músculo Esquelético/metabolismo , Consumo de Oxígeno , Traumatismos de la Médula Espinal/fisiopatología , Adulto , Capacidad Cardiovascular , Femenino , Humanos , Masculino , Persona de Mediana Edad , Músculo Esquelético/fisiología , Traumatismos de la Médula Espinal/metabolismo , Traumatismos de la Médula Espinal/rehabilitación , Caminata
10.
Spinal Cord Ser Cases ; 3: 17011, 2017.
Artículo en Inglés | MEDLINE | ID: mdl-28435743

RESUMEN

INTRODUCTION: Although there has been substantial emphasis on the neuromuscular and cardiovascular adaptations following rehabilitation, pulmonary adaptations in individuals with incomplete SCI (iSCI) in response to locomotor training have been less frequently studied. In healthy individuals, effective transition from rest to work is accomplished by a hyperpneic response, which exhibits an exponential curve with three phases. However, the degree to which our current understanding of exercise hyperpnea can be applied to individuals with iSCI is unknown. The purpose of this case series was to characterize exercise hyperpnea during a rest to constant work rate (CWR) transition before and after 12-15 weeks of overground locomotor training (OLT). CASE PRESENTATION: Six subjects with cervical motor incomplete spinal cord injury participated in 12-15 weeks of OLT. Subjects were trained in 90-min sessions twice a week. All training activities were weight-bearing and under volitional control without the assistance of body-weight support harnesses, robotic devices or electrical stimulation. Six minutes of CWR treadmill walking was performed at self-selected pace with cardiorespiratory analysis throughout the tests before and after OLT. Averaged group data for tidal volume, breathing frequency or VE showed no difference before and after training. VE variability was decreased by 46.7% after OLT. DISCUSSION: CWR VE from rest to work was linear throughout the transition. Following OLT, there was a substantial reduction in VE variability. Future research should investigate the lack of a phasic ventilatory response to exercise, as well as potential mechanisms of ventilatory variability and its implications for functional performance.

11.
J Mol Diagn ; 18(6): 890-902, 2016 11.
Artículo en Inglés | MEDLINE | ID: mdl-27727019

RESUMEN

The use of circulating cell-free DNA (cfDNA) as a biomarker in transplant recipients offers advantages over invasive tissue biopsy as a quantitative measure for detection of transplant rejection and immunosuppression optimization. However, the fraction of donor-derived cfDNA (dd-cfDNA) in transplant recipient plasma is low and challenging to quantify. Previously reported methods to measure dd-cfDNA require donor and recipient genotyping, which is impractical in clinical settings and adds cost. We developed a targeted next-generation sequencing assay that uses 266 single-nucleotide polymorphisms to accurately quantify dd-cfDNA in transplant recipients without separate genotyping. Analytical performance of the assay was characterized and validated using 1117 samples comprising the National Institute for Standards and Technology Genome in a Bottle human reference genome, independently validated reference materials, and clinical samples. The assay quantifies the fraction of dd-cfDNA in both unrelated and related donor-recipient pairs. The dd-cfDNA assay can reliably measure dd-cfDNA (limit of blank, 0.10%; limit of detection, 0.16%; limit of quantification, 0.20%) across the linear quantifiable range (0.2% to 16%) with across-run CVs of 6.8%. Precision was also evaluated for independently processed clinical sample replicates and is similar to across-run precision. Application of the assay to clinical samples from heart transplant recipients demonstrated increased levels of dd-cfDNA in patients with biopsy-confirmed rejection and decreased levels of dd-cfDNA after successful rejection treatment. This noninvasive clinical-grade sequencing assay can be completed within 3 days, providing the practical turnaround time preferred for transplanted organ surveillance.


Asunto(s)
ADN/genética , Pruebas Genéticas/métodos , Pruebas Genéticas/normas , Trasplante de Órganos , Donantes de Tejidos , Receptores de Trasplantes , Alelos , Línea Celular , ADN/sangre , Femenino , Frecuencia de los Genes , Marcadores Genéticos , Genotipo , Rechazo de Injerto/diagnóstico , Rechazo de Injerto/genética , Rechazo de Injerto/inmunología , Secuenciación de Nucleótidos de Alto Rendimiento , Humanos , Masculino , Polimorfismo de Nucleótido Simple , Estándares de Referencia , Reproducibilidad de los Resultados , Sensibilidad y Especificidad
12.
ANZ J Surg ; 86(9): 720-4, 2016 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-26602991

RESUMEN

BACKGROUND: By the early nineteenth century, breast cancer was better understood and surgical treatment was emerging as a more favoured option although anaesthesia had yet to be discovered. Many questions would have arisen for a woman advised to have surgery, including possible alternatives, what the operation would entail, pain and risks involved and the competence, ethical and professional behaviour of the surgeon. This paper addresses these questions in the context of the contemporary environment, focusing in particular on the personal experiences of the women involved. METHODS: A review of the surviving personal letters and information regarding three women who had breast surgery, and of the contemporary surgical writings on breast cancer, training of surgeons, ethical and professional expectations and the concurrent status of women in society. RESULTS: Surgical training was in its infancy and the first pronouncements on medical ethics had just been published. Pain, bleeding and infection presented formidable challenges and carried significant risks. Women were frequently devoid of information, suffered a loss of their dignity and were progressively stripped of their authority. CONCLUSIONS: Breast cancer surgery was accompanied by enormous emotional and physical distress and significant risks from bleeding and infection. Although efforts were being made to give women a greater voice and autonomy in society, their position when receiving health care remained largely a submissive one. Lack of information, feelings of vulnerability, helplessness and loss of control occurred. The public perception of detachment most likely accounted for the occasional negative stigma then associated with the surgical profession.


Asunto(s)
Neoplasias de la Mama/historia , Mastectomía/historia , Neoplasias de la Mama/cirugía , Femenino , Historia del Siglo XIX , Humanos , Mastectomía/métodos
14.
Ann Surg Oncol ; 18(13): 3778-84, 2011 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-21630124

RESUMEN

BACKGROUND: Ductal carcinoma in situ (DCIS) is commonly identified on screening mammography. Standard treatment for localized DCIS is wide local excision (WLE) and adjuvant radiotherapy. This approach represents overtreatment in many cases, where the DCIS would never have become clinically significant, or where less intensive treatment would have been satisfactory. We reviewed the medium-term outcome of a cohort of screen detected DCIS patients treated mainly with WLE without radiotherapy. METHODS: All patients diagnosed with DCIS at NorthWestern BreastScreen between January 1994 and December 2005 were identified from a prospective database. Demographic, pathological, treatment, and outcome data were collected and analyzed. Survival and local recurrence (LR) rates were determined, and associations between various factors and recurrence were analyzed. RESULTS: A total of 422 patients were diagnosed with DCIS. There were 400 patients treated with WLE, and 27 of these received adjuvant radiotherapy. The 5- and 8-year overall and breast cancer specific survival rates were 96.1 and 91.3%, and 99.6 and 99.3%, respectively. The local recurrence rate was 15.4 and 17.1% at 5 and 8 years. Of 56 local recurrences, 34 had WLE after recurrence, 16 of which had adjuvant radiotherapy. No single factor was statistically significantly associated with local recurrence, although combining factors revealed groups where the LR rate was less than 5%. CONCLUSIONS: Breast cancer specific mortality was very low in this cohort of older patients with screen-detected DCIS. There was a moderate rate of local recurrence that could usually be salvaged with breast conservation. Decisions regarding adjuvant radiotherapy should take these findings into account.


Asunto(s)
Neoplasias de la Mama/cirugía , Carcinoma Intraductal no Infiltrante/cirugía , Recurrencia Local de Neoplasia/cirugía , Adulto , Anciano , Neoplasias de la Mama/mortalidad , Neoplasias de la Mama/patología , Carcinoma Intraductal no Infiltrante/mortalidad , Carcinoma Intraductal no Infiltrante/patología , Femenino , Estudios de Seguimiento , Humanos , Persona de Mediana Edad , Recurrencia Local de Neoplasia/mortalidad , Recurrencia Local de Neoplasia/patología , Pronóstico , Estudios Prospectivos , Tasa de Supervivencia
15.
Surgeon ; 9 Suppl 1: S3-5, 2011.
Artículo en Inglés | MEDLINE | ID: mdl-21549991

RESUMEN

An international consensus statement has been developed as a reference on the key principles to be considered during discussions on surgical education and training and the delivery of surgical care in an era of restricted hours.


Asunto(s)
Educación de Postgrado en Medicina/métodos , Cirugía General/educación , Carga de Trabajo , Australasia , Competencia Clínica , Educación de Postgrado en Medicina/normas , Europa (Continente) , Docentes Médicos , Humanos , Internacionalidad , América del Norte , Seguridad del Paciente , Tolerancia al Trabajo Programado
16.
ANZ J Surg ; 81(6): 411-7, 2011 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-22295340

RESUMEN

BACKGROUND: The education and training of tomorrow's surgeons are predicated upon the involvement of a broad spectrum of surgical educators. Identification of the factors that influence their ongoing participation is crucial for its continuity. METHODS: A study was performed on 695 surgeons identified as having major involvement in surgical education and training using a questionnaire based on a number of educational themes. RESULTS: Four hundred and thirty-eight surgeons (63%) completed the questionnaire. The majority found teaching rewarding and would recommend it to colleagues, although fewer would advocate being a supervisor or course instructor. The highest motivating factors were sharing knowledge, enjoyment of teaching, necessity to remain up to date and the interaction that teaching provides with colleagues. Barriers included insufficient time because of other work commitments, lack of support from hospital management and intrusion on work­life balance. Surgeons saw themselves as successful in answering trainees' questions, appropriately delegating patient care, providing feedback and creating a positive learning environment. They were least confident in helping trainees to identify their learning needs and develop their learning goals. New courses were considered desirable in assessment, providing feedback and the management of underperforming trainees. CONCLUSIONS: Enjoyment of teaching, sharing knowledge and the requirement to keep up to date, motivate surgeons to teach. Lack of time for teaching, and lack of recognition and support act as barriers. Designated time for teaching, being equipped for the educational roles involved, and the provision of appropriate recognition and support are necessary to sustain this essential resource.


Asunto(s)
Educación Médica Continua , Empleo , Docentes Médicos/organización & administración , Cirugía General/educación , Australia , Humanos , Nueva Zelanda , Estudios Retrospectivos , Encuestas y Cuestionarios , Enseñanza , Recursos Humanos
17.
Arch Surg ; 145(11): 1098-104, 2010 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-21079099

RESUMEN

HYPOTHESIS: A core needle biopsy (CNB) diagnosis of ductal carcinoma in situ (DCIS) may be associated with a final diagnosis of invasive cancer. Preoperative radiologic, clinical, and pathological features may identify patients at high risk of diagnostic upstaging, who may be appropriate candidates for sentinel node biopsy at initial surgery. DESIGN: Review of prospectively collected database. SETTING: Tertiary teaching referral hospital and a population-based breast screening center. PATIENTS: Consecutive patients from January 1, 1994, to December 31, 2006, whose CNB findings showed DCIS or DCIS with microinvasion. MAIN OUTCOME MEASURES: Upstaging to invasive cancer. RESULTS: Eleven of 15 cases of DCIS with microinvasion (73.3%) and 65 of 375 cases of DCIS (17.3%) were upstaged to invasive cancer. Ten of 21 palpable lesions (47.6%) were found to have microinvasion. For impalpable DCIS, multivariate analysis showed that noncalcific mammographic features (mass, architectural distortion, or nonspecific density) (odds ratio [95% confidence interval], 2.00 [1.02-3.94]), mammographic size of 20 mm or greater (2.80 [1.46-5.38]), and prolonged screening interval of 3 years or longer (4.41 [1.60-12.13]) were associated with upstaging. The DCIS grade on CNB was significant on univariate analysis (P = .04). The rate of upstaging increased with the number of significant factors present in a patient: 8.3% in patients with no risk factors, 20.8% in those with 1 risk factor, 39.6% in those with 2 risk factors, and 57.1% in those with 3 risk factors. CONCLUSIONS: The risk of upstaging can be estimated by using preoperative features in patients with DCIS on CNB. We propose a management algorithm that includes sentinel node biopsy for patients with DCIS who have microinvasion on CNB, palpable DCIS, 2 or more predictive factors, and planned total mastectomy.


Asunto(s)
Biopsia con Aguja , Neoplasias de la Mama/patología , Neoplasias de la Mama/cirugía , Carcinoma in Situ/patología , Carcinoma in Situ/cirugía , Carcinoma Ductal de Mama/patología , Carcinoma Ductal de Mama/cirugía , Invasividad Neoplásica/patología , Anciano , Algoritmos , Australia , Femenino , Humanos , Modelos Logísticos , Mamografía , Persona de Mediana Edad , Estadificación de Neoplasias , Reoperación , Estudios Retrospectivos , Factores de Riesgo , Biopsia del Ganglio Linfático Centinela , Resultado del Tratamiento
18.
Med Teach ; 32(12): e541-6, 2010.
Artículo en Inglés | MEDLINE | ID: mdl-21090941

RESUMEN

BACKGROUND: Recruitment of medical graduates to research careers is declining. Expansion of medical knowledge necessitates all graduates be equipped to critically evaluate new information. To address these challenges, a mandatory intercalated degree programme was introduced as part of curriculum reform. AIMS: To review the place on intercalated degrees, the methods available for learning about research and to analyse experience with a new university programme focusing on research. METHODS: A literature review followed by the analysis of experience with eight cohorts of students who had completed the new programme. RESULTS: A total of 1599 students completed the programme. Laboratory-based research was the most common choice followed by clinical research, population health, epidemiology, medical humanities and mental health. Also, 93% of students spent over 75% of their time undertaking research. Sixty-three students published their research, half as first authors. Students and coordinators support the programme. Learning about research during the postgraduate phase is variable and frequently left to individual choice. CONCLUSION: Intercalating an additional degree focusing on research can achieve a number of learning objectives but demands a level of maturity, autonomy and preparedness, not uniformly present in students undertaking a mandatory intercalated programme. A more realistic goal is the development of 'research-mindedness' amongst all students.


Asunto(s)
Curriculum , Educación de Pregrado en Medicina , Medicina Basada en la Evidencia , Programas Obligatorios , Estudios de Cohortes , Femenino , Humanos , Masculino , Evaluación de Programas y Proyectos de Salud , Encuestas y Cuestionarios , Reino Unido
19.
ANZ J Surg ; 80(1-2): 13-7, 2010 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-20575874

RESUMEN

CONTEXT: The aims of surgical education, training and professional development programmes are to ensure surgeons will provide high quality health care throughout their professional lives. Development and delivery of these programmes requires a mixture of surgeons with a different but complimentary range of competencies in medical education, all eager to facilitate learning and support educational scholarship. METHODS: The Royal Australasian College of Surgeons has undertaken a major review of the challenges, risks and opportunities surrounding the development and delivery of its education and continuing professional development programmes. RESULTS: Conflicting demands on surgeons' time have compromised their availability for educational activities. At the same time, a decline has occurred in the recognition and value of teaching and educational scholarship as a consequence of financial rewards and prestige now coming principally from patient care and biomedical research. New educational methods have been introduced which have added to the complexities involved and the level of commitments required. In response, the College and its surgical specialty partners have established an Academy of Surgical Educators as a resource for the nine specialties of surgery. It will promote high quality patient care by providing expert educational leadership, guidance and advice and through the advancement and application of educational scholarship. CONCLUSION: The establishment of the Academy serves as a powerful symbol of the importance the College places on its core responsibility as an educational body. Working in association with the University Departments of Surgery throughout Australia and New Zealand, the Academy will better equip the College and its partner Specialist Societies and Associations to meet and sustain the increasingly sophisticated requirements involved in higher education.


Asunto(s)
Academias e Institutos/organización & administración , Docentes Médicos/provisión & distribución , Especialidades Quirúrgicas/educación , Australasia , Australia , Humanos , Nueva Zelanda
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