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PubMed1991

Statistical guidelines for The British Journal of Surgery.

A set of statistical guidelines is presented which should be followed by authors preparing manuscripts for submission to The British Journal of Surgery. Simple points relating to presentation are explained in full, and more complex issues are highlighted and discussed in an accompanying review article.

Periodicals as Topic↗
PubMed2001

An advisory statement from the Pediatric Working Group of the International Liaison Committee on Resuscitation.

The International Liaison Committee on Resuscitation (ILCOR), with representation from North America, Europe, Australia, New Zealand, Africa, and South America, was formed in 1992 to provide a forum for liaison between resuscitation organizations in the developed world. This consensus document on resuscitation extends previously published ILCOR advisory statements on resuscitation to address the unique and changing physiology of the newly born infant within the first few hours after birth and the techniques for providing advanced life support. After careful review of the international resuscitation literature and after discussion of key and controversial issues, consensus was reached on almost all aspects of neonatal resuscitation, and areas of controversy and high priority for additional research were delineated. Consensus on resuscitation for the newly born infant included the following principles: Personnel trained in the basic skills of resuscitation should be in attendance at every delivery. A minority (fewer than 10%) of newly born infants require active resuscitative interventions to establish a vigorous cry and regular respirations, maintain a heart rate > 100 beats per minute (bpm), and maintain good color and tone. When meconium is present in the amniotic fluid, it should be suctioned from the hypopharynx on delivery of the head. If the meconium-stained newly born infant has absent or depressed respirations, heart rate, or muscle tone, residual meconium should be suctioned from the trachea. Attention to ventilation should be of primary concern. Assisted ventilation with attention to oxygen delivery, inspiratory time, and effectiveness judged by chest rise should be provided if stimulation does not achieve prompt onset of spontaneous respirations and/or the heart rate is < 100 bpm. Chest compressions should be provided if the heart rate is absent or remains < 60 bpm despite adequate assisted ventilation for 30 seconds. Chest compressions should be coordinated with ventilations at a ratio of 3:1 and a rate of 120 "events" per minute to achieve approximately 90 compressions and 30 rescue breaths per minute. Epinephrine should be administered intravenously or intratracheally if the heart rate remains < 60 bpm despite 30 seconds of effective assisted ventilation and chest compression circulation. Common or controversial medications (epineprine, volume expansion, naloxone, bicarbonate), special resuscitation circumstances affecting care of the newly born, continuing care of the newly born after resuscitation, and ethical considerations for initiation and discontinuation of resuscitation are discussed. There was agreement that insufficient data exist to recommend changes to current guidelines regarding the use of 21% versus 100% oxygen, neuroprotective interventions such as cerebral hypothermia, use of a laryngeal mask versus endotracheal tube, and use of high-dose epinephrine. Areas of controversy are identified, as is the need for additional research to improve the scientific justification of each component of current and future resuscitation guidelines.

Environment↗
PubMed1995

Practice guidelines for autopsy pathology. Autopsy reporting. Autopsy Committee of the College of American Pathologists.

The Autopsy Committee of the College of American Pathologists has prepared this guideline in conjunction with representatives of other organizations to assist pathologists in the reporting of autopsies. The guideline is to be regarded as being primarily an educational tool. Application of these recommendations on autopsy reporting is to be made on the basis of the judgment of the pathologist engaged in a specific case.

Abstracting and Indexing↗
PubMed2000

Recommendations for quality improvement in genetic testing for cystic fibrosis. European Concerted Action on Cystic Fibrosis.

These recommendations for quality improvement of cystic fibrosis genetic diagnostic testing provide general guidelines for the molecular genetic testing of cystic fibrosis in patients/individuals. General strategies for testing as well as guidelines for laboratory procedures, internal and external quality assurance, and for reporting the results, including the requirements of minimal services in mutation testing, the nomenclature for describing mutations, procedures to control false-positive amplification reactions and to validate tests, and guidelines to implement a quality system in a molecular diagnostic laboratory are reviewed.

Accreditation↗
PubMed2002

Markers for early detection of cancer: statistical guidelines for nested case-control studies.

BACKGROUND: Recently many long-term prospective studies have involved serial collection and storage of blood or tissue specimens. This has spurred nested case-control studies that involve testing some specimens for various markers that might predict cancer. Until now there has been little guidance in statistical design and analysis of these studies. METHODS: To develop statistical guidelines, we considered the purpose, the types of biases, and the opportunities for extracting additional information. RESULTS: The following guidelines: (1) For the clearest interpretation, statistics should be based on false and true positive rates - not odds ratios or relative risks (2) To avoid overdiagnosis bias, cases should be diagnosed as a result of symptoms rather than on screening. (3) To minimize selection bias, the spectrum of control conditions should be the same in study and target screening populations. (4) To extract additional information, criteria for a positive test should be based on combinations of individual markers and changes in marker levels over time. (5) To avoid overfitting, the criteria for a positive marker combination developed in a training sample should be evaluated in a random test sample from the same study and, if possible, a validation sample from another study. (6) To identify biomarkers with true and false positive rates similar to mammography, the training, test, and validation samples should each include at least 110 randomly selected subjects without cancer and 70 subjects with cancer. CONCLUSION: These guidelines ensure good practice in the design and analysis of nested case-control studies of early detection biomarkers.

Bias↗
PubMed2003

Small cell lung cancer.

Among patients with lung cancers, the proportion of those with small cell lung cancer (SCLC) has decreased over the last decade. SCLC is staged as limited-stage disease and extensive-stage disease. Standard staging procedures for SCLC include CT scans of the chest and abdomen, bone scan, and CT scan or MRI of the brain. The role for positron emission tomography scanning in the staging of SCLC has yet to be defined. Limited-stage disease is treated with curative intent with chemotherapy and radiation therapy, with approximately 20% of patients achieving a cure. The median survival time for patients with limited-stage disease is approximately 18 months. Extensive-stage disease is treated primarily with chemotherapy, with a high initial response rate of 60 to 70% and a complete response rate of 20 to 30%, but with a median survival time of approximately 9 months. Patients achieving a complete remission should be offered prophylactic cranial irradiation. Currently, there is no role for maintenance treatment or bone marrow transplantation in the treatment of patients with SCLC. Relapsed or refractory SCLC has a uniformly poor prognosis. In this section, evidence-based guidelines for the staging and treatment of SCLC are outlined.

Aged↗
PubMed2006

Psoralen cream plus ultraviolet A photochemotherapy (PUVA cream): our experience.

BACKGROUND: Psoralen ultraviolet A (PUVA) bath photochemotherapy has been proved highly effective in the treatment of various dermatoses without potential side-effects of systemic therapy. Another form of topical PUVA therapy (PUVA cream) without the logistical requirements for bath tubs has recently been developed. OBJECTIVE: We sought to develop preparation and treatment standards to PUVA cream and to confirm its clinical efficacy in the treatment of various dermatoses. METHODS: In the first phase, the safety of a novel cream containing 0.002% 8-methoxypsoralen (8-MOP) was determined in six healthy volunteers. In a second phase, 40 patients with different dermatoses were treated with a minor concentration (0.001% 8-MOP), following the guidelines for topical PUVA of the British Photodermatology Group. RESULTS: Plasma levels of psoralen after the application of the novel cream containing 0.002% 8-MOP, were less than 34 ng/mL, the maximum 8-MOP concentration reported for topical PUVA. With a minor concentration (0.001% 8-MOP), important improvement or healing was found in 53.3% of the cycles, generally with a good response since the first month of treatment. Only mild side-effects were detected in 14 patients. CONCLUSIONS: Based on our data, PUVA cream photochemotherapy is well accepted by patients and may be a highly effective treatment even if previous therapy was unsuccessful. In addition, PUVA cream is easier to use than PUVA bath.

Administration, Cutaneous↗