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From: Moustafa ElHousinie (drhosini@hotmail.com)
Date: Thu 27 May 2004 - 03:20:42 EST


Message-id: <BAY14-F30T7J7mgsQQI00005d6f@hotmail.com>

I have data on disappearance of virus C from blood of acutely infected
    humans. Blood samples were taken approximately 2, 3 and 6 months after
the
    expected date of exposure. It is noted that :
    1- not all timepoints are available
    2- in few cases the person turned negative early (2-3 months) to turm
back
    to positive after 6 months
    3- the definition of spontaneos clearance is not well established but
    usually treatement, if any, should be started if the person remain
positive
    after 5-6 months from exposure
    the questions are:
    is this a logistic regression problem or time to event (lifetable
analysis)
    problem? and in either case HOW to proceed with R
    thanks in advance
    Mostafa

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