共查询到20条相似文献,搜索用时 15 毫秒
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E Gibson N Fleming D Fleming J Culhane F Hauck M Janiero A Spitzer 《Canadian Metallurgical Quarterly》1998,36(6):938-942
OBJECTIVES: In April 1992, the American Academy of Pediatrics (AAP) recommended that healthy infants be positioned for sleep on their side or back to reduce the risk of Sudden Infant Death Syndrome (SIDS). The authors hypothesized three different forms of the intervention to examine the impact of the recommendation according to theory such as technology diffusion. Seasonality was included in the models to control its effect when testing. METHODS: Box and Tiao time-series intervention methodology was used to examine the effect of the AAP recommendation on SIDS rates. Sudden Infant Death Syndrome mortality data from Philadelphia and Chicago were examined separately for white and nonwhite populations over 32 quarters. RESULTS: Overall SIDS rates dropped significantly according to an abrupt effect from the intervention. However, the effect appeared to be gradually declining in Philadelphia but permanent in Chicago. In Philadelphia, a decline of 62.3% was estimated in whites in the first quarter after the intervention but decreased to only 5% in the last quarter of 1994. A decline of 35.8% was estimated in nonwhites in the first quarter after the intervention but decreased to only 9.4% in the last quarter of 1994. An abrupt and permanent decrease of 26.7% and 16.5% was found in Chicago for whites and nonwhites, respectively. CONCLUSIONS: Evidence of an abrupt adoption of the recommendation can be explained by the authority innovation decision made by the AAP. Some evidence was found that the effect is temporary, perhaps because physicians are reversing earlier decisions. The demonstrated methodology provides a powerful way to test naturally occurring interventions from quasiexperimental designs to test the impact of policy guidelines. 相似文献
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A Zaritsky V Nadkarni MF Hazinski G Foltin L Quan J Wright D Fiser D Zideman P O'Malley L Chameides 《Canadian Metallurgical Quarterly》1995,30(2):95-115
This consensus document is an attempt to provide an organized method of reporting pediatric ALS data in out-of-hospital, emergency department, and in-hospital settings. For this methodology to gain wide acceptance, the task force encourages development of a common data set for both adult and pediatric ALS interventions. In addition, every effort should be made to ensure that consistent definitions are used in all age groups. As health care changes, we will all be challenged to document the effectiveness of what we currently do and show how new interventions or methods of treatment improve outcome and/or reduce cost. Only through collaborative research will we obtain the necessary data. For these reasons, and to improve the quality of care and patient outcomes, it is the hope of the task force that clinical researchers will follow the recommendations in this document. It is recognized that further refinements of this statement will be needed; these recommendations will improve only when researchers, clinicians, and EMS personnel use them, work with them, and modify them. Suggestions, recommendations, and other comments aimed at improving the reporting of pediatric resuscitation should be sent to Arno Zaritsky, MD, Eastern Virginia Medical School, Children's Hospital of The King's Daughter, Division of Critical Care Medicine, 601 Children's Lane, Norfolk, VA 23507. 相似文献
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AE Flatt 《Canadian Metallurgical Quarterly》1976,1(1):3-7
Tape recordings of time-compressed (40 and 60%) monosyllables were administered to 11 patients with diffuse unilateral temporal lobe lesion, 4 hemispherectomy patients, and 16 patients with discrete unilateral temporal lobe lesion. Time compression was accomplished with the Fairbanks electromechanical apparatus, which allowed temporal compression but did not introduce frequency distortion. The results revealed that with 60% time compression, all patients with diffuse unilateral cortical lesion showed breakdown of speech discrimination in the ear contralateral to the lesion. Patients with discrete unilateral cortical lesion generally did not demonstrate breakdown with the 60% time-compressed materials. 相似文献
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WA Gay 《Canadian Metallurgical Quarterly》1998,10(3):178-180
The concentrations of secretory IgA (sIgA) in the saliva and the concentrations of free secretory components (FSC) both in the saliva and gastric fluid of patients with Helicobacter pylori HP-positive gastritis and of a control group with functional recurrent abdominal pain (RAP) were measured in order to determine whether there is a deficiency of these non-specific local defence factors in children with HP infection. Eighteen patients with HP-positive gastritis and 12 children with RAP were included in the study and sIgA and FSC concentrations were analysed using the radial immunodiffusion technique. In contrast to our initial hypothesis, the concentrations of FSC in saliva and gastric fluid and sIgA in saliva of patients with HP infection showed no significant difference when compared with children who do not have an organic disease and HP infection. It is suggested that these local defence factors are not involved in the pathogenesis of HP-positive gastritis. 相似文献
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The American Academy of Neurology (AAN) membership survey was developed to define and monitor changing trends in the demography and practice profile of US neurologists. All 11,300 AAN members received a Demographic Information Form (DIF) and 2,600 members also received a Practice Profile Form (PPF) to gather this information. Response rates were 75% from the DIF group and 70% from those who received both. For responding members, age (median, 43 years), sex (83% male), race/ethnic origin (85% white), and medical schools (22% international medical graduates) are similar to those for other physicians in the United States. The ratio of neurologists to population ranges from a low of 1.3 per 100,000 in Wyoming to a high of 11.0 per 100,000 in the District of Columbia. One-fourth of neurologists complete at least one residency in addition to neurology and 39% complete a fellowship. Although nearly two-thirds (63%) of neurologists have a full-time or clinical academic appointment, 70% indicate patient care as their primary medical activity. The number of working hours and professional activities of neurologists vary with practice type. Neurologists perform numerous neurodiagnostic tests for reimbursement, particularly neurophysiologic studies and lumbar puncture. One-third of office-based neurologists have an ownership interest in an imaging facility. The most common payment sources for professional fees are commercial insurers (32%) and Medicare (29%), the latter reflecting the large proportion of disabled and elderly treated by neurologists. Office-based neurologists provide 5% charity care and write off an additional 13% of unpaid charges. The practice of neurology is constantly changing.(ABSTRACT TRUNCATED AT 250 WORDS) 相似文献
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RJ Prineas K Goodman CL Soskolne G Buck M Feinleib J Last JS Andrews 《Canadian Metallurgical Quarterly》1998,8(8):482-489
PURPOSE: A survey to establish both the need and subject areas for a possible new set of ethics guidelines for epidemiologists was conducted among a random sample of 300 North American (Canada, Mexico, and United States) members of three major United States-based professional epidemiology organizations. METHODS: An 88% response rate revealed wide agreement on topics to be included in any new set of guidelines, but uncertainty prevailed about the need for new guidelines; 41% agreed that there was a need to develop a new set, 43% had no opinion, and 16% disagreed. RESULTS: There was almost no difference in preferences between men and women for topics to be included in a new set of guidelines, or between those aware or unaware of extant ethics guidelines in epidemiology. Fifty-four percent were aware of such guidelines and only 29% of these said they could describe the content of the guidelines. CONCLUSION: More needs to be done to evaluate the utility of ethics codes in epidemiology. 相似文献
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M Nuwer 《Canadian Metallurgical Quarterly》1997,49(1):277-292
A. Digital EEG is an established substitute for recording, reviewing, and storing a paper EEG record. It is a clear technical advance over previous paper methods. It is highly recommended. (Class III evidence, Type C recommendation). B. EEG brain mapping and other advanced QEEG techniques should be used only by physicians highly skilled in clinical EEG, and only as an adjunct to and in conjunction with traditional EEG interpretation. These tests may be clinically useful only for patients who have been well selected on the basis of their clinical presentation. C. Certain quantitative EEG techniques are considered established as an addition to digital EEG in: C.1. Epilepsy: For screening for possible epileptic spikes or seizures in long-term EEG monitoring or ambulatory recording to facilitate subsequent expert visual EEG interpretation. (Class I and II evidence, Type A recommendation as a practice guideline). C.2. OR and ICU monitoring: For continuous EEG monitoring by frequency-trending to detect early, acute intracranial complications in the OR or ICU, and for screening for possible epileptic seizures in high-risk ICU patients. (Class II evidence, Type B recommendation as a practice option). D. Certain quantitative EEG techniques are considered possibly useful practice options as an addition to digital EEG in: D.1. Epilepsy: For topographic voltage and dipole analysis in presurgical evaluations. (Class II evidence, Type B recommendation). D.2. Cerebrovascular Disease: Based on Class II and III evidence, QEEG in expert hands may possibly be useful in evaluating certain patients with symptoms of cerebrovascular disease whose neuroimaging and routine EEG studies are not conclusive. (Type B recommendation). D.3. Dementia: Routine EEG has long been an established test used in evaluations of dementia and encephalopathy when the diagnosis remains unresolved after initial clinical evaluation. In occasional clinical evaluations, QEEG frequency analysis may be a useful adjunct to interpretation of the routine EEG when used in expert hands. (Class II and III evidence as a possibly useful test, Type B recommendation). E. On the basis of current clinical literature, opinions of most experts, and proposed rationales for their use, QEEG remains investigational for clinical use in postconcussion syndrome, mild or moderate head injury, learning disability, attention disorders, schizophrenia, depression, alcoholism, and drug abuse. (Class II and III evidence, Type D recommendation). F. On the basis of clinical and scientific evidence, opinions of most experts, and the technical and methodologic shortcomings, QEEG is not recommended for use in civil or criminal judicial proceedings. (Strong Class III evidence, Type E recommendation). G. Because of the very substantial risk of erroneous interpretations, it is unacceptable for any EEG brain mapping or other QEEG techniques to be used clinically by those who are not physicians highly skilled in clinical EEG interpretation. (Strong Class III evidence, Type E recommendation). 相似文献
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This paper is one of three in a series prepared by the Research, Science and Therapy Committee of The American Academy of Periodontology and is intended for the information of the dental profession. It represents the position of the Academy regarding the current state of knowledge about treatment of gingivitis and periodontitis. The other papers are entitled The Etiology and Pathogenesis of Periodontal Diseases and Diagnosis of Periodontal Diseases. 相似文献
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The 1991 American Association of Gynecologic Laparoscopists membership survey on operative hysteroscopy had a total of 630 respondents (almost double the 1988 number) who reported performing 17,298 procedures as compared to 7,293 in 1988. Directed biopsy and endometrial ablation were the procedures reported most commonly. Endometrial ablation increased fivefold since 1988, and myomectomy increased fourfold. The majority of operative hysteroscopies were performed for a complaint of abnormal bleeding (73%). The most frequently reported complication was uterine perforation not requiring transfusion (11 per 1,000 procedures). The rate of water intoxication or pulmonary edema dropped from 3.4/1,000 in 1988 to 1.4/1,000 in 1991. However, some serious complications (eight laparotomies for bowel injury, three CO2 embolisms and three deaths) were reported for 1991. 相似文献