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PubMed1979

The four basic types of evaluation: clinical reviews, clinical trials, program reviews, and program trials.

Four basic types of evaluation, each appropriate in a distinctive situation, are the clinical review and the clinical trial, which are concerned with the care of the individual patient, and the program review and program trial, which deal with programs or services directed at groups or populations. Evaluative reviews are primarily motivated by concern with the welfare of the specific population served, and they appraise specific activities in specific settings as a basis for decisions concerning these activities. Clinical and program trials aim to generate knowledge of more general applicability, especially concerning causal relationships between care and outcomes. The types of evaluation differ in the questions they pose and in the methods used to answer them. Failure to draw a distinction between program reviews and program trials is a frequent cause of wasteful or unhelpful evaluative studies.

Consumer Behavior↗
PubMed1989

PMUR.

Explore the source record for details and available documents.

Florida↗
PubMedDate not supplied

Retrospective review of grafting techniques utilized in conjunction with endosseous implant placement.

Bone resorptive patterns may prevent the ideal placement of endosseous implants. Numerous techniques have been described to create a more favorable surgical site for implant placement. This retrospective review was conducted to determine the frequency of need for implant site preparation in an outpatient clinical setting. In addition, different techniques of surgical site preparation were evaluated to determine their frequency of use and surgical outcome. A history review was conducted of all consecutively treated partially edentulous patients between January 1993 and December 1997. This review evaluated the number of implants placed, the age and gender of patient, the type of graft used, and the status of the implant. In all, 542 patients were seen in this time interval, with a total of 1,313 implants placed. Implant site preparation was needed in 4.4% of the patients, with the requirement for grafts occurring more frequently in the maxilla. Implant site preparation is a relatively infrequent requirement in the general population. Grafts are required more frequently in the maxilla than in the mandible. Complications following grafting were relatively infrequent and were not severe.

Age Factors↗
PubMed2003

Serum clozapine levels: a review of their clinical utility.

Therapeutic drug monitoring (TDM) is frequently utilized in the treatment of psychiatric conditions, but its clinical application concerning the use of clozapine is unclear. We present three case reports of patients taking clozapine, review the relevant literature, and propose guidelines to aid the clinical use of TDM of clozapine. Due to its complex metabolism, there are significant inter- and intra-individual variations in clozapine serum levels, for a given dose. However, the range of serum levels that corresponds with toxicity remains unclear. Although central nervous system side-effects may correlate with serum level, many adverse effects of clozapine appear to be unrelated, including haematological and cardiac events. There are numerous clinically significant interactions between clozapine and other substances, including prescribed medications, nicotine and caffeine. TDM of clozapine may be of clinical value in certain situations, such as poor clinical response; signs of toxicity; onset of seizures; changes in concurrent medication, caffeine or nicotine; liver disease; and suspected non-compliance. The current literature does not support the routine testing of serum clozapine levels in everyday clinical practice.

Adult↗
PubMedDate not supplied

Detection of extraprostatic prostate cells utilizing reverse transcription-polymerase chain reaction.

This article reviews the utility of reverse transcription-polymerase chain reaction (RT-PCR) in prostate cancer. RT-PCR aims to detect occult micrometastases in non-prostatic sites. Due to its exquisite analytical sensitivity, RT-PCR is able to amplify and detect even low-level, prostate-specific messages present at these extraprostatic sites. In recent years, a fair amount of data on the clinical utility of the technique had been reported. The target tissues under investigation are peripheral blood, bone marrow aspirate, and lymph nodes. Favorite markers of choice are prostate-specific antigen (PSA), prostate-specific membrane antigen (PSMA), and human glandular kallikrein-2 (hK2). False positives among negative controls are low. For the most part, RT-PCR is inadequate in detecting tumor cells in the peripheral blood from patients who are known to have metastatic prostate cancer. All studies showed that RT-PCR could detect PSA, PSMA or hK2 mRNAs in the circulation of patients who have organ-confined or extraprostatic disease. Most studies showed that RT-PCR utilizing current markers could not be used as a prospective test to diagnose prostate cancer. However, a few studies also showed that the detection rate could be predictive and sensitive enough to differentiate patients with organ-confined disease from those with extraprostatic disease. Data from PSA- or PSMA-RT-PCR using lymph nodes as the tissue source is more encouraging. RT-PCR was able to detect PSA and/or PSMA positive samples that have not been detected by conventional pathology.

Antigens, Surface↗
PubMed2002

A systematic review of health state utility values for osteoporosis-related conditions.

An important weakness of economic models in the field of osteoporosis has been the dependence on assumptions or expert judgements rather than empirical estimates for the utility values of key health events associated with osteoporosis such as hip, vertebral, wrist fracture and established osteoporosis. This paper seeks to identify the best available utility estimates for health states associated with osteoporosis and make recommendations about their use. It is based on a systematic search of the main literature databases. Studies meeting inclusion criteria have been reviewed in terms of the appropriateness of the valuation technique, the validity of the descriptive system (if one was used), the number and type of respondents, and overall quality of the study. Twenty three estimates of health state values (HSVs) were found across the four conditions from five studies. These empirical estimates were found to differ significantly from the commonly used assumptions in economic evaluation, but with a wide variation between estimates for the same state (0.32 to 0.80 for vertebral fracture states). This variation can be partly explained by the valuation technique, health state description and the background and perspective of respondent, and leaves scope for considerable discretion that could be abused. There are also problems in using values obtained from the study populations to those in economic models and the difficulty of predicting health state values in those who avoid a fracture. The review recommends a set of health state values as part of a "reference case" for use in economic models. Due to the paucity of good quality of estimates in this area, further recommendations are made regarding the design of future studies to collect HSVs relevant to economic models.

Aged↗
PubMed1998

Process improvements reduce utilization of resources for aortic aneurysm repair.

In conjunction with the VA reorganization to promote greater efficiency of health care provision, ambulatory surgery (AS) programs have been created. These programs institute outpatient preoperative assessment and operative management. This study examines the impact of these process changes on resources utilized by patients requiring repair of abdominal aortic aneurysms (AAAs). The medical records of 15 consecutively treated patients undergoing elective, infrarenal AAA repair before (1992-1993) and after (1995-1996) AS implementation were reviewed. Resource utilization was assessed by evaluating preoperative tests performed (inpatient or outpatient), ICU days, and inpatient length of stay (LOS). Postoperative morbidity and mortality were noted. Patient age, AAA size, and prevalence of diabetes mellitus, hypertension, cardiac disease, COPD, and tobacco use were similar between the two groups. Abdominal ultrasound, CT scanning, and angiography were significantly more frequently performed on an outpatient basis after implementation of the AS program. The median preoperative LOS was reduced in the AS group (1 vs 6 days, P = 0.001, Student t test), resulting in a lower inpatient LOS (11 vs 16, P < 0.01, Student t test). All patients survived and the incidence of complications was similar between the groups. Hospital resource utilization was significantly decreased, largely by shifting preoperative assessment to the outpatient setting. This study illustrates that benefits of an ambulatory surgery program can be extended beyond facilitating outpatient operations and should result in decreased length of hospitalization for other major surgical procedures, such as abdominal aortic aneurysm repair.

Aged↗
PubMed1993

Recent developments in gastrointestinal absorption and tissue utilization of peptides: a review.

Considerable evidence has been accumulated regarding the absorption of dipeptides and tripeptides, yet, even with the growing body of knowledge, the nutritional and metabolic significance of peptide absorption is not fully understood, especially in ruminants. Muscle, mammary gland, liver, kidney, intestinal mucosa, and other tissues either have been shown to have, or are suspected to have, the ability to utilize peptides as a source of AA to meet cellular demands. Investigations suggest that ruminal microbes have the ability to produce substantial amounts of small peptides as a consequence of their hydrolysis of dietary proteins. The extent to which intact peptides may be absorbed into the blood is controversial. Some of the inconsistency in reported observations may be because of limitations of analytical procedures, species differences, or both. Peptide absorption appears to be an important physiological process in ruminants and may constitute the primary source of absorbed AA. The recent observation that the stomach region of the gastrointestinal tract may be an important site of peptide absorption is highly significant. Emerging evidence for the contribution that peptide absorption makes to AA provisioning of ruminants may change some of the currently held views about protein utilization in these unique animals.

Absorption↗
PubMed1989

Medicare program; Utilization and Quality Control Peer Review Program; third Scope of Work for Peer Review Organizations.

This notice describes new requirements for the third Scope of Work for Utilization and Quality Control Peer Review Organizations (PROs) for fiscal year 1989, beginning October 1, 1988. This notice implements section 4091(b)(1) of the Omnibus Budget Reconciliation Act of 1987 (Pub. L. 100-203), which requires us to publish a new policy or procedure adopted by the Secretary that affects substantially the performance of contract obligations at least 30 days before the date the policy or procedure is to be used. It also implements other provisions of Pub. L. 100-203, as well as requirements of the Omnibus Budget Reconciliation Act of 1986.

Humans↗