Friday, March 03, 2006

st: RE: tabodds command with 'if' option

Assuming your data are set up appropriately, try:

For num 1/5: tabodds case year [fweight=freq] if cat == X

-p

______________________________ Paul F. Visintainer, PhD Professor and Chairman Department of Epidemiology and Biostatistics School of Public Health New York Medical College Valhalla, NY 10595 PH: (914) 594-4804 FX: (914) 594-4853

-----Original Message----- From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Sean Shu Sent: Thursday, March 02, 2006 2:21 PM To: statalist@hsphsun2.harvard.edu Subject: st: tabodds command with 'if' option

Hi there,

I have a cross-sectional time series dataset. I want to find whether any

trend is presented over the years for different categories. So I used tabodds command. But I want to apply the command for different category seperately. so I write the command syntax over the dataset attached:

> tabodds case year [fweight=freq][if cat = 1] > tabodds case year [fweight=freq][if cat = 2] ... > tabodds case year [fweight=freq][if cat = 5]

Can you tell what's wrong with it? and Do I need write syntax to loop the tabodds five time?

Thank you very much!

Sean Shu HKPR District Public Health Unit Ontario, Canada

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