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2008 Mar 07
0
How to do a time-stratified case-crossover analysis for air pollution data?
...ctmi<-rep(0,sum(air$nctrl)) capm<-rep(pm10, mi) ctpm<-rep(pm10, air$nctrl) cast<-rep(air$stratn, mi) ctst<-rep(air$stratn, air$nctrl) cady<-rep(dates, mi) ctdy<-rep(dates, air$nctrl) cases<-c(cami, ctmi) stranu<-c(cast, ctst) days<-c(cady, ctdy) pmva<-c(capm, ctpm) air2<-data.frame(cases, days, pmva,stranu) air.cl<-clogit(cases~pmva + strata(stranu), method="approximate", data=air2) air.glm<-glm(mi~pm10, family=poisson, data=air) #air.gam<-gam(mi~s(pm10), family=poisson) qres[q]<-as.numeric(coef(air.cl)) glm...
2008 Mar 07
0
How to do a time-stratified case-crossover analysis for air pollution data? Unformatted text-version, with an additional note
...<-rep(1,sum(mi)) ctmi<-rep(0,sum(air$nctrl)) capm<-rep(pm10, mi) ctpm<-rep(pm10, air$nctrl) cast<-rep(air$stratn, mi) ctst<-rep(air$stratn, air$nctrl) cady<-rep(dates, mi) ctdy<-rep(dates, air$nctrl) cases<-c(cami, ctmi) stranu<-c(cast, ctst) days<-c(cady, ctdy) pmva<-c(capm, ctpm) air2<-data.frame(cases, days, pmva,stranu) air.cl<-clogit(cases~pmva + strata(stranu), method="approximate", data=air2) air.glm<-glm(mi~pm10, family=poisson, data=air) #air.gam<-gam(mi~s(pm10), family=poisson) qres[q]<-as.numeric(coef(air.cl)) glmres[q]&l...