response: (chd2=='1') 
covariates: dsmoker 
SNP: MTHFD1L_MG_449 
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= 2401 
                                      coef exp(coef) se(coef) robust se      z
allele[notmissing]                 -0.0721     0.930    0.248     0.287 -0.252
wz[notmissing, selectedcovariates]  0.6635     1.942    0.122     0.138  4.797
wrua2[notmissing]FRA               -1.2963     0.274    0.381     0.400 -3.238
wrua2[notmissing]SWE               -0.3807     0.683    0.256     0.272 -1.401
wrua2[notmissing]UNK               -0.2580     0.773    0.318     0.346 -0.746
                                         p
allele[notmissing]                 8.0e-01
wz[notmissing, selectedcovariates] 1.6e-06
wrua2[notmissing]FRA               1.2e-03
wrua2[notmissing]SWE               1.6e-01
wrua2[notmissing]UNK               4.6e-01

                                   exp(coef) exp(-coef) lower .95 upper .95
allele[notmissing]                     0.930      1.075     0.530      1.63
wz[notmissing, selectedcovariates]     1.942      0.515     1.481      2.55
wrua2[notmissing]FRA                   0.274      3.656     0.125      0.60
wrua2[notmissing]SWE                   0.683      1.463     0.401      1.16
wrua2[notmissing]UNK                   0.773      1.294     0.392      1.52

Rsquare= 0.024   (max possible= 0.88 )
Likelihood ratio test= 58.5  on 5 df,   p=2.52e-11
Wald test            = 42.8  on 5 df,   p=3.99e-08
Score (logrank) test = 54.4  on 5 df,   p=1.72e-10,   Robust = 46.5  p=7.18e-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