* commands for Problem 13.7 of VER

insheet using "H:\VHM\VHM811\henrik\ex13_07.csv"

* effects of pasture when sex is ignored (with both rr and or)
cs seroconv pasture [fw=n], or

* conditional tables for each sex (with both rr and or)
cs seroconv pasture [fw=n] if sex=="f", or
cs seroconv pasture [fw=n] if sex=="m", or

* stratified analysis by sex, one for rr and one for or
cs seroconv pasture [fw=n], by(sex)
cc seroconv pasture [fw=n], by(sex)

* association between sex and seroconv in exposure-negative group
tabulate seroconv sex if pasture==0 [fw=n], chi2

* association between pasture and sex
tabulate pasture sex [fw=n], chi2