Hello,
I have a general help question that some of you might be able able to help.
I would like calculate sample size for a study (a two group comparison) based
on the outcome of reduction on (recurrent) events (say hospital admissions).
In a previous study, hospital admission rate of 140
Hello,
I have a general help question that some of you might be able able to help.
I would like to design a study (a two group comparison) based on reduction on
events(say hospital admissions). In a previous study hospital admission rate of
140 admissions per 72 patients (over a 4 month
Hello,
I am having trouble with retrieving some data in queries involve with variables
with data type date. See the enclosed example:
ll-c(21DEC2006,15DEC2006)
ss-data.frame(ll)
ss-transform(ss,ll=as.date(as.character(ll)))
(ss)
ll
1 17156
2 17150
tt-sqldf(select ll from ss)
(tt)
ll
1
Hi All,
I have a basic statistics question you might be able to help.
I have some data collected within a single population (say of chronic illness)
over a period of time (number under observation is constant, say 100 subjects).
The question is how could I test whether the frequency of an
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