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排序方式: 共有2911条查询结果,搜索用时 15 毫秒
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Stability of malignant breast microcalcifications 总被引:3,自引:0,他引:3
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Underuse of screening mammography by family physicians 总被引:3,自引:0,他引:3
Although the American College of Radiology, the National Cancer Institute, and the American Cancer Society recommend screening mammography for women more than 40 years old, there is little compliance with these recommendations. Primary-care physicians are often reluctant to refer patients for the procedure, whereas the patients are usually willing to undergo the procedure. This survey documents the underuse of screening mammography by family physicians who are members of the Michigan Academy of Family Physicians. The underuse of mammography by this physician sample was due to two main factors: The physicians perceived far more disadvantages than advantages with mammography and perceived problems (with, e.g., equipment, effectiveness, and patient acceptance) as pervasive. To change the attitudes and referral behavior of family physicians, one must take into account the specific, negative perceptions of the procedure and place an emphasis on the initial referral, since subsequent referrals are easier to implement. 相似文献
995.
The level of Hb C in the erythrocytes of individuals with Hb C trait decreases significantly in the presence of coexisting alpha- thalassemia. This relationship may result from the higher affinity of beta A than beta C for limiting amounts of alpha-globin during hemoglobin assembly. This mechanism would predict that the beta A and beta C synthetic capacity in alpha-thalassemic individuals with Hb C trait should be balanced despite the low levels of Hb C in their circulating erythrocytes. To directly test this prediction, we have measured the beta A and beta C synthetic capacity of reticulocyte RNA isolated from two individuals with Hb C trait, one with a normal alpha- globin genotype and one with alpha-thalassemia. The balanced expression of beta A and beta C in both cases supports the proposed posttranslational control over Hb C expression. 相似文献
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CT analysis of bowed stringed instruments 总被引:1,自引:0,他引:1
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G Thernlund G Dahlquist B Hägglöf SA Ivarsson B Lernmark J Ludvigsson S Sjöblad 《Acta paediatrica (Oslo, Norway : 1992)》1996,85(8):947-953
The initial psychological reactions at the onset of insulin-dependent diabetes mellitus (IDDM) in a population-based sample of 76 children were studied with staff observations and a self-report questionnaire for children 12 years of age and more. Younger children reacted with more anger and less distress than the older children. High initial self-reported distress was associated with poorer subjective psychological IDDM adjustment at a follow-up 10 months later for the older children. The children's initial reactions as well as later adjustment were intimately associated with maternal initial reactions in the total group. The metabolic control, estimated as the mean level of the major fraction of glycosylated haemoglobin (Hb AIc ) during the first 2 years, was poorer in the adolescent group. Initial anxiety over injections and protest but low general distress in mothers and children were associated with better metabolic control. 相似文献
1000.