Call:
coxph(formula = f0, data = d, x = TRUE)

  n= 128, number of events= 101 

                   coef exp(coef) se(coef)      z Pr(>|z|)  
arm            -0.18440   0.83161  0.21081 -0.875    0.382  
age60-69 years -0.23601   0.78978  0.25651 -0.920    0.358  
age>69 years   -0.12936   0.87866  0.24595 -0.526    0.599  
who            -0.06315   0.93880  0.20571 -0.307    0.759  
resection      -0.27509   0.75950  0.20961 -1.312    0.189  
baseline        0.19973   1.22107  0.08717  2.291    0.022 *
---
Signif. codes:  0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1

               exp(coef) exp(-coef) lower .95 upper .95
arm               0.8316      1.202    0.5501     1.257
age60-69 years    0.7898      1.266    0.4777     1.306
age>69 years      0.8787      1.138    0.5426     1.423
who               0.9388      1.065    0.6273     1.405
resection         0.7595      1.317    0.5036     1.145
baseline          1.2211      0.819    1.0293     1.449

Concordance= 0.599  (se = 0.029 )
Likelihood ratio test= 9.51  on 6 df,   p=0.1
Wald test            = 9.48  on 6 df,   p=0.1
Score (logrank) test = 9.55  on 6 df,   p=0.1

Call:
coxph(formula = f1, data = d, x = TRUE)

  n= 128, number of events= 101 

                   coef exp(coef) se(coef)      z Pr(>|z|)   
arm             0.12623   1.13455  0.23392  0.540  0.58944   
age60-69 years -0.31116   0.73260  0.26620 -1.169  0.24244   
age>69 years   -0.06249   0.93942  0.25189 -0.248  0.80407   
who            -0.07611   0.92671  0.20683 -0.368  0.71287   
resection      -0.29258   0.74633  0.21286 -1.375  0.16928   
baseline        0.19303   1.21292  0.08880  2.174  0.02971 * 
change          0.55951   1.74981  0.18254  3.065  0.00218 **
visit           1.95832   7.08743  1.88671  1.038  0.29929   
---
Signif. codes:  0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1

               exp(coef) exp(-coef) lower .95 upper .95
arm               1.1345     0.8814    0.7173     1.794
age60-69 years    0.7326     1.3650    0.4348     1.234
age>69 years      0.9394     1.0645    0.5734     1.539
who               0.9267     1.0791    0.6179     1.390
resection         0.7463     1.3399    0.4917     1.133
baseline          1.2129     0.8245    1.0192     1.443
change            1.7498     0.5715    1.2235     2.502
visit             7.0874     0.1411    0.1756   286.061

Concordance= 0.635  (se = 0.031 )
Likelihood ratio test= 20.21  on 8 df,   p=0.01
Wald test            = 18.88  on 8 df,   p=0.02
Score (logrank) test = 17.1  on 8 df,   p=0.03

          chisq df    p
arm       0.759  1 0.38
age       0.977  2 0.61
who       0.483  1 0.49
resection 0.830  1 0.36
baseline  1.717  1 0.19
GLOBAL    4.754  6 0.58
             chisq df    p
arm       0.590277  1 0.44
age       1.181347  2 0.55
who       0.334870  1 0.56
resection 0.501300  1 0.48
baseline  1.653043  1 0.20
change    0.000569  1 0.98
visit     1.023642  1 0.31
GLOBAL    4.984527  8 0.76
R version 4.5.1 (2025-06-13 ucrt)
Platform: x86_64-w64-mingw32/x64
Running under: Windows 11 x64 (build 26300)

Matrix products: default
  LAPACK version 3.12.1

locale:
[1] C
system code page: 65001

time zone: Etc/GMT-9
tzcode source: internal

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] survival_3.8-3

loaded via a namespace (and not attached):
[1] compiler_4.5.1 Matrix_1.7-3   splines_4.5.1  grid_4.5.1     lattice_0.22-7
