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  • 1
    Electronic Resource
    Electronic Resource
    [s.l.] : Macmillian Magazines Ltd.
    Nature 423 (2003), S. 623-625 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The atmospheres of the giant planets Jupiter and Saturn have a puzzling system of zonal (east–west) winds alternating in latitude, with the broad and intense equatorial jets on Saturn having been observed previously to reach a velocity of about 470 m s-1 at ...
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1365-2516
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Summary.  Hepatitis C virus (HCV) infection is an important cause of mortality in human immune deficiency virus (HIV)-positive haemophiliacs. This study describes progression to AIDS, death from HCV end-stage liver disease (ESLD) and all-cause mortality over 20 years. All HIV-positive haemophiliacs in La Paz University Hospital were included in this cohort. HIV seroconversion was estimated using mathematical techniques for interval-censored data from 1979 to 1985. Poisson regression was used to estimate rates of AIDS, death from ESLD and all causes in different periods: before 1988, 1988–89, 1990–91, 1992–93, 1994–95, 1996–97 and 1998–2001 using competing risk models. Among 383 cohort members, global AIDS incidence was 9.7 per 100 person-years, peaking in 1992–93 and dropping by 87% in 1998–2001 compared with before 1988 [incidence rate ratio (IRR) 0.13; 95% CI: 0.03–0.53]. Overall mortality was 7.5 per 100 person-years, was highest from 1992 to 1997, and fell by 66% in 1998–2001 compared with before 1988 (IRR 0.34; 95% CI: 0.14–0.81). Eighteen (5%) persons died of ESLD which represented 19% of deaths before 1988, 4% during 1988–89, 1990–91 and 1992–93, 2% in 1994–95, 10% in 1996–97 and 33% in 1998–2001. Overall death rate from ESLD was 0.5 cases per 100 person-years with no statistically significant trend observed over time. Important reductions in HIV disease progression to AIDS and death have been observed from 1998 to 2001, and can be attributed to highly active antiretroviral therapy. Although no increase in the rate of HCV-related deaths can be demonstrated, HCV accounts for an increasing proportion of deaths in the recent years.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1573-7284
    Keywords: Asthma ; Chronic obstructive pulmonary disease ; Emergency room ; Length of stay ; Log-normal ; Survival analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The aim of this paper is to model the length of stay following hospital emergency due to asthma and chronic obstructive pulmonary disease (COPD) as well as those factors relating to its duration. Clinical records of all those hospital emergencies for asthma and COPD in people aged over 14 at the Hospital Clinico Universitario of Valencia (HCUV) during years 1993–1995 were reviewed. Data were analysed by entry and discharge time, sex, age and destination. Parametric survival models (exponential, Weibull and log-normal) were used for each diagnostic. Percentiles and relative percentiles were calculated; 1369 asthma emergencies and 2734 cases COPD were observed. The mean length of stay was 5.21 hours for asthma and 6.32 for COPD log-normal model was the best parametric model. Lengths of stay are greater for those hospital admitted. Stays, in cases of asthma, were shorter during months of August and November, with no differences for other variables. Also a shorter duration of stay for the month of August was found. Women are seen to stay for longer periods than men. Time modelling of emergency admission for asthma and COPD permits its use in the determining of the dates of incidence for episodes of asthma and COPD based on hospital admissions data, as seeing a median of delay in emergency rooms greater than 6 hours. For studies on air pollution impact these results imply that all those admissions during the early hours of the morning should be categorised as events of the previous day.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Social psychiatry and psychiatric epidemiology 33 (1998), S. 224-229 
    ISSN: 1433-9285
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The rate of survival and causes of mortality in a cohort of 2103 psychiatric patients registered on a psychiatric case register and followed up for 7 years are compared with those of a general population sample (n = 2382) randomly extracted from the municipal census in Valencia (Spain). Using multivariate analysis by Cox regression, patients suffering organic psychoses and those diagnosed with drug abuse or dependency exhibited a greater risk of death than the general population for the total causes of death; no interaction was found between sociodemographic variables and psychiatric pathology. In terms of the causes of death, and controlling for the effect of age and sex, organic psychoses involved a greater risk of death due to cardiovascular and respiratory causes, and a greater risk of non-natural deaths than the general population. Schizophrenia and related conditions, the abuse of alcohol/other drugs, and neurosis/personality disorders all presented a higher risk of death from liver disease. The major affective disorders involved a greater risk of death due to suicide or accidents. The study concludes with a discussion of the possible explanations of these results.
    Type of Medium: Electronic Resource
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