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Table 3 Cox-regression analysis (time-dependent)

From: Epidemiologic trends in chronic renal replacement therapy over forty years: A Swiss dialysis experience

 

Hazard Ratios for death (HR)

95%CI for HR

P

Lower

Upper

Dialysis initiation, 1st quartile (ref.)

1

   

Dialysis initiation, 2nd quartile

0.68

0.48

0.96

0.026

Dialysis initiation, 3rd quartile

0.82

0.55

1.22

0.320

Dialysis initiation, 4rd quartile

0.95

0.61

1.47

0.803

Age at 1st dialysis, yr

1.01

1.00

1.02

0.063

Sex (1: male)

1.02

0.80

1.31

0.858

HD (1) vs. PD

1.23

0.87

1.74

0.244

TPL (1: transplanted)

0.10

0.06

0.15

<0.001

Time dependent covariates

(independent variables × time)

    

Dialysis initiation, quartile

0.99

0.97

1.01

0.287

Age at 1st dialysis, yr

1.00

1.00

1.00

0.275

Sex (1: male)

1.00

0.97

1.03

0.985

HD (1) vs. PD

1.01

0.97

1.05

0.592

TPL (1)

1.07

1.02

1.11

0.002

  1. With survival time as dependent variable, status variable death (1), and quartile of dialysis initiation (decade, categorial with first quartile as reference), sex, age at dialysis initiation, dialysis modality (HD/PD) and transplant status as independent variables and time dependent covariates.