search for: agebase

...is the dataset ## the dependent variable (casectrln) is dichotomous and coded 0,1 ## rs743572_2 is one of the snps (which is coded 0,1,2 for the 3 genotypes) library(stats) modadd = glm(geno$casectrln ~rs743572_2 + factor(racegrp)+ factor(smokgp)+ factor(alcgp)+ factor(bmigp) + factor(ipssgp) + agebase, family="binomial") drop1(mod,scale=0,test=c("Chisq"), x=NULL, k=2) There is a great deal of missing data in this dataset for both snps and for covariates--so I have been instructed not to simply drop all cases with missing genotype or covariate data . How can I drop the observ...