PubMed · 11041649
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N Turner. 2000. Chi-squared test.. https://pubmed.ncbi.nlm.nih.gov/11041649/
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Crack cocaine outcomes at 4-5 years are reported for 496 drug users recruited from UK treatment programmes. About one-third used crack at intake and at 4-5 years. The results show different outcome profiles. For crack users at intake, use was more than halved at follow-up. Among non-crack-users at intake, about a quarter used crack during follow-up, of whom about two-thirds had never used crack before. Polydrug use and use of other stimulants were associated with using crack. Crack users reported worse acquisitive crime and psychological health outcomes. About 10% reported injecting crack. The reductions in crack use are encouraging, but the onset of crack use among many non-users at intake suggests the need to develop more effective treatment interventions.
This clinical study examines the diagnostic accuracy of exercise echocardiography for detecting significant coronary stenoses in infarct-related arteries in patients with healed myocardial infarction. Quantitative coronary angiography and exercise echocardiography using treadmill testing were performed within 2 weeks of each other in 123 patients with a prior myocardial infarction. Coronary lumen diameter stenosis > or =50% by quantitative coronary angiography and the lack of a hyperdynamic response on exercise echocardiography was considered significant. For detection of infarct-related coronary lesions, treadmill exercise echocardiography was highly sensitive (91%) but less specific (59%) than for detection of non-infarct-related artery lesions. The 2 groups of patients with large and small infarct sites had similar sensitivity for detection of residual stenosis of the infarct-related artery (88% vs 96%, p = NS); however, the specificity of the small infarct sites for this purpose was significantly higher than that of the large infarct sites (86% vs 33%, p < 0.01). When remote ischemia was detected on exercise echocardiography, the specificity of exercise echocardiography was significantly lower (33% vs 70%, p < 0.05) than when remote ischemia was not present. Thus, although there is high sensitivity, the specificity of treadmill exercise echocardiography for detecting infarct-related artery lesions is limited. However, high specificity is maintained when the infarct size is small and/or remote ischemia is not present.
OBJECTIVES: To describe the proportion of dental practitioners who report vacancies within their dental practice for the following: dental surgeons, dental hygienists, dental nurses and dental receptionists. To determine the proportion of dental practitioners working in general dental practice who would consider employing a dental therapist. METHOD: Analysis of data from the British Dental Association Omnibus Survey 2000. The sample comprised 992 qualified dentists in all fields of practice. FINDINGS: The most commonly reported vacancies were for dental surgeons (18% of practitioners reported vacancies), dental nurses (17%) and dental hygienists (12%). Approximately 46% of general dental practitioners reported that they would employ a dental therapist if legislation permitted. The main reason for not employing a dental therapist was insufficient space in the dental practice. CONCLUSIONS: A large number of vacancies exist for dental surgeons, dental nurses and dental hygienists in the United Kingdom. Around half of dental practices express an interest in employing dental therapists should legislation permit.