We use cookies to distinguish you from other users and to provide you with a better experience on our websites. Close this message to accept cookies or find out how to manage your cookie settings.
We use cookies to distinguish you from other users and to provide you with a better experience on our websites. Close this message to accept cookies or find out how to manage your cookie settings.
To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to .
To save content items to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about saving to your Kindle.
Note you can select to save to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.
Find out more about the Kindle Personal Document Service.
The ageing of the population and increasing longevity result in predictions of sizeable increases in long-term care expenditures. Other analyses have shown significant decreases in disability prevalence among older people in the US. This study provides an empirical quantification of the net result of these two forces (increased expenditures due to ageing versus potential expenditure reductions due to reduced disability) using the Medicare Current Beneficiary Survey. The analyses show that the implications of ageing and increasing longevity for long-term care expenditures are modest relative to the effects of future increases or decreases in functional abilities of older people.
Objectives: To identify and examine the methodologic issues related to evaluating the effectiveness of treatment adherence to clinical guidelines. The example of antiretroviral therapy guidelines for human immunodeficiency virus (HIV) disease is used to illustrate the points.
Methods: Regression analysis was applied to observational HIV clinic data for patients with CD4+ cell counts less than 500 per μL and greater than 50 per μL at baseline (n = 704),using Cox proportional hazards time-varying covariates models controlling for baseline risk. The results are compared with simpler models (Cox model [without time-varying covariates] and logistic regression). In addition, the effect of including a measure of exposure to antiretroviral guidelines in the model is explored.
Results: This study has three implications for modeling clinical guideline effectiveness. To capture events that are time-sensitive, a duration model should be used, and covariates that are time-varying should be modeled as time-varying. Thirdly, incorporating a threshold measure of exposure to reflect the minimum period of time for guideline adherence required for a measurable effect on patient outcome should be considered.
Conclusions: The methods proposed in this paper are important to consider if guidelines are to evolve from being a tool for summarizing and transferring the results of research from the literature to clinicians into a practical tool that influences clinical practice patterns. However, the methodology tested in this study needs to be validated using additional data on similar patients and using data on patients with other diseases.
Tetrakis(dimethylamino)titanium (TDMAT) is an important precursor for TiN, TiCN, and TiSiN thin films in chemical vapor deposition. In order to better understand how the gas phase chemistry influences the formation of these films, the decomposition of TDMAT has been studied in a high-temperature flow reactor (HTFR) by molecular beam mass spectrometry (MBMS). Two kinetic regimes have been observed as a function of temperature. Rate expressions and mechanistic implications will be presented. Further studies are in progress to identify the gas phase species relevant to the decomposition mechanism of TDMAT.
Emergency medical technicians (EMTs) find that the death of patients in their care is stressful.
Random sample of certified EMTs in one state (Levels I–IV).
A blinded, self-administered survey was sent to a random sample of 2,500 EMTs. Demographic data obtained were: level of training; hours worked each month; population of area served; age; gender; number of deaths per year; training for coping prehospital deaths; and availability of protocols and on-line medical advice for out-of-hospital deaths. A five-point, Likert scale was used to rate the frequency of perceived stress experienced by EMTs in specific situations and the routine practice for notification of survivors. Univariable analysis was performed using Spearman's Rank correlation, Kruskal-Wallis test, and Mann-Whitney U-test. Multivariable correlations were performed using forward and backward step-wise logistic regression analysis. A significance level of 0.05 was used throughout.
There were 654 respondents with a mean age of 35.5±8.3 yr; 83% were men. Their highest level of training was: 4% EMT-I, 43% EMT-II, 18% EMT-III, 33% EMT-IV. They saw an average of 9.6 deaths/year and spent an average of 20±17 minutes with survivors. 62 % found treatment of a patient that was dying or died in their care was commonly a stressful experience. Factors that made notification of the family about the prehospital death emotionally difficult included: fewer hours worked/month; working in a smaller community; lower level of EMT training; female gender; and fewer deaths seen during the previous year. The same factors were associated with general emotional difficulty in treatment of a patient who died during prehospital care. Online [direct] medical direction by physicians was common (73%), but did not lessen the difficulty of notification. It did reduce the emotional difficulty for specific clinical situations. Written protocols for not attempting resuscitation were common (66%), but only 44% had protocols for termination of resuscitation. Resuscitation of the clearly dead for the benefit of the family (10%) or for the EMT (5%) was practiced infrequently. Most (67%) respondents had some formal training in dealing with death and the dying patient. Such training did not correlate with less difficulty in notification of survivors or in coping with the deaths of patients in their care.
EMTs perceive they have emotional difficulty when prehospital deaths occur and survivors must be notified. Less experience and a lower level of EMT training correlate with more difficulty in coping with patient death. Protocols and on-line [direct] medical control can provide support for the EMT in coping with out-of-hospital deaths. Most notification of survivors is handled by EMTs with formal training to cope with patients that are dying or who die during prehospital care.
Email your librarian or administrator to recommend adding this to your organisation's collection.