response: (chd2=='1') 
covariates: dsmoker 
SNP: SMAD3_MG_452 
Call:
coxph(formula = y[notmissing] ~ allele[notmissing] + wz[notmissing, 
    selectedcovariates] + wrua2[notmissing] + strata(wsex[notmissing]) + 
    cluster(wdata$id[notmissing]), weights = weight[notmissing], 
    robust = TRUE)

  n= 2400 
                                      coef exp(coef) se(coef) robust se      z
allele[notmissing]                  0.0208     1.021   0.0941     0.104  0.199
wz[notmissing, selectedcovariates]  0.6613     1.937   0.1218     0.138  4.777
wrua2[notmissing]FRA               -1.2992     0.273   0.3811     0.400 -3.245
wrua2[notmissing]SWE               -0.3834     0.682   0.2569     0.271 -1.416
wrua2[notmissing]UNK               -0.2659     0.767   0.3188     0.346 -0.768
                                         p
allele[notmissing]                 8.4e-01
wz[notmissing, selectedcovariates] 1.8e-06
wrua2[notmissing]FRA               1.2e-03
wrua2[notmissing]SWE               1.6e-01
wrua2[notmissing]UNK               4.4e-01

                                   exp(coef) exp(-coef) lower .95 upper .95
allele[notmissing]                     1.021      0.979     0.832     1.253
wz[notmissing, selectedcovariates]     1.937      0.516     1.477     2.541
wrua2[notmissing]FRA                   0.273      3.666     0.124     0.598
wrua2[notmissing]SWE                   0.682      1.467     0.401     1.159
wrua2[notmissing]UNK                   0.767      1.305     0.389     1.511

Rsquare= 0.024   (max possible= 0.88 )
Likelihood ratio test= 58.3  on 5 df,   p=2.69e-11
Wald test            = 42.9  on 5 df,   p=3.95e-08
Score (logrank) test = 54.3  on 5 df,   p=1.84e-10,   Robust = 46.5  p=7.13e-09

  (Note: the likelihood ratio and score tests assume independence of
     observations within a cluster, the Wald and robust score tests do not).

Updated on 2008-06-04