cox analysis time dependant R

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I create my table to make an analysis cox survival time-dependant (with t start and t stop for each ID)

my variable dependant is death and my variable independent is a score

So i look the document R about this type of analysis but when i run the code to have an HR and confidence interval my sample is multiple by 2 ( like they considered all my row as a sample)

I'm wondering if the following code is right to make analysis survival time dependant

coxph(Surv(tStart, tStop, DEATH) ~ score ,
        data =df_timedep, cluster = ID)

Do you know if it's ok with this code ?

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