search for: brfss

hello, I am trying to do exploratory factor analysis with BRFSS dataset ( http://www.cdc.gov/brfss/technical_infodata/surveydata/2008.htm) for a couple of days, but I was not able to do that and got frustrated. Can anybody help me with step by step guide? BRFSS dataset provides ASCII or SAS format. Thank you. chloe [[alternative HTML version deleted]]

...yciprop, na.rm=TRUE, ci=TRUE, vartype="ci") sex I(rfsmok == "At risk") ci_l ci_u Male Male 0.2277632725 0.2097154285 0.2468790907 Female Female 0.1486524831 0.1349832066 0.1634444481 ------------------------- R Code: sample.brfss <- svydesign(id=~brfss.2011$SEQNO, strata=~brfss.2011$ststr, weights=~brfss.2011$LLCPWT, data=brfss.2011, nest=T) popage <- c(0.128810, 0.182648, 0.219077, 0.299194, 0.170271) options("survey.lonely.psu"="adjust") testing_dataset <- subset(sample.brfss, (!is.na(agegr5)...

...he function svyCprod. I'm not sure what names attribute this is referring to because the arguments to rowsum and the rval object do not appear to have a names attribute. Does anyone know what the problem here might be? Has anyone else used the survey package on public-use survey datasets like BRFSS or NHIS? Was there anything special you had to do to those datasets before specifying the survey design? I know that's a pretty vague question. If any of you are SUDAAN users, I basically mean does it have to be structured differently that what you pass into a SUDAAN procedure. Thanks in adv...