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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Diseases of the colon & rectum 39 (1996), S. 80-87 
    ISSN: 1530-0358
    Keywords: Crohn's disease ; Surgical treatment ; Recurrence ; rate ; Perforating disease ; Nonperforating disease
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract PURPOSE: This is a study of the long-term course of surgically treated Crohn's disease designed to identify prognostic factors predictive of the time course and probability of surgical recurrence. PATIENTS AND METHODS: The study is based on the records of 101 patients admitted to our institution for surgical treatment of Crohn's disease from January 1, 1970, to December 31, 1985. Follow-up was complete in 97 (96 percent) and incomplete in 4 patients. Median follow-up from the date of first operation was 13.25 years. The cumulative probability of requiring surgical treatment for recurrent disease was calculated using the life table method and further analyzed with the log-rank test and Cox regression. RESULTS: The time to reoperation in this series was not significantly influenced by sex, age at onset of symptoms, age at diagnosis, age at first operation, anatomic location, and number of sites involved at the time of first operation. The only variable that had a statistically significant effect on the time to reoperation was characterization of disease at the time of operation as being perforating (P) opposed to nonperforating (NP). Median interval between the first and second intestinal operation was 1.7 years for the P group and 13 years for the NP group (P value, 0.005),and the median time between any two operations undergone during the study period was 2 years for the P group and 9.9 years for the NP group (tP =0.0002).The risk of having to undergo reoperation for recurrence was greatest during the first two years after an operation, and this was mainly because of a short time to surgical recurrence in the P group of indications. Thereafter, the yearly hazard of requiring further surgery was maintained at approximately 5 percent. CONCLUSION: The cumulative probability of requiring a reoperation for patients undergoing surgery for the P type of Crohn's disease is significantly different from that of patients with NP indications. The risk of having to undergo further surgery is particularly high during the first two years following an operation for perforating disease. The concept of a relatively aggressive perforating type of Crohn's disease and a more indolent nonperforating type is confirmed by the results of this study.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1573-7373
    Keywords: medulloblastoma ; microvessel counts ; immunohistochemistry ; p53 ; bcl-2 ; Mib-1 ; factor VIII-related antigen
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The aim of this study was to retrospectively assess the prognostic value of p53 and bcl-2 protein expression, cell proliferation index (Mib-1 index), and tumor microvessel density (factor VIII-related antigen) in pediatric medulloblastoma patients. Tumor specimens of 55 patients (age 2–18 years) with medulloblastoma treated with a curative intent between 1972 and 1991 were studied. Slides of paraffin embedded tissue were stained with monoclonal antibodies (mAb) and examined under high power light microscopy for the presence of immunoreactivity. Microvessel density was scored both in the area of most intense staining (‘Angio-max’) and in 3 additional randomly selected areas. The sum of these 4 scores was termed ‘Angio-total’. ‘Angio-max’ and ‘Angio-total’ were evaluated separately by two independent investigators to assess reproducibility. None of the parameters studied, i.e. p53 or bcl-2 expression, Mib-1 index or microvessel density scores were associated with patient survival. Microvessel scores between observers were significantly but weakly correlated, with correlation coefficients (r)〈0.5 for both ‘Angio-max’ and ‘Angio-total’. Leptomeningeal spread at diagnosis was the only independent factor associated with a poor survival (p=0.003). There was no association of leptomeningeal metastasis with any of the biological markers tested in this study.
    Type of Medium: Electronic Resource
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  • 3
    Title: Statistische Auswertungen von Prozentzahlen Probit- und Logitanalyse mit EDV
    Author: Linder, Arthur
    Contributer: Berchtold, Willi
    Publisher: Basel u.a. :Birkhäuser,
    Year of publication: 1976
    Pages: 232 S.
    Type of Medium: Book
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