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Table 6 Hazard ratio for 30-day mortality

From: Early postoperative mortality after simultaneous or staged bilateral primary total hip arthroplasty: an observational register study from the swedish Hip arthroplasty register

 

Crude

Adjusted

 

HR

CI (95%)

p

HR

CI (95%)

p

Time interval

      

Simultaneous

1.1

0.3-3.6

0.86

2.0

0.6-6.6

0.26

≤6 months

1.0

0.5-2.2

0.96

1.4

0.7-3.0

0.39

7-12 months

0.6

0.3-1.2

0.15

0.7

0.3-1.5

0.37

>12 months (ref)a

1.0

-

-

1.0

-

-

Sex

      

Male

1.0

-

-

1.0

-

-

Female

0.8

0.5-1.3

0.38

0.7

0.4-1.2

0.16

Age

      

<50

0.5

0.1-4.1

0.55

0.6

0.1-5.3

0.68

50-59

0.4

0.1-1.6

0.18

0.4

0.1-1.7

0.22

60-75 (ref)

1.0

-

-

1.0

-

-

>75

3.6

2.1-6.1

<0.001

3.8

2.2-6.5

<0.001

Fixation

      

Cemented (ref)

1.0

-

-

1.0

-

-

Uncemented

0.5

0.1-1.5

0.21

1.0

0.3-3.6

0.97

Otherb

0.4

0.1-1.3

0.12

0.7

0.2-2.4

0.59

  1. Adjustment for sex, age, and type of prosthesis fixation. Stratified for diagnosis since proportional hazard was missing for this variable.
  2. aRef: reference.
  3. bHybrid, reversed hybrid and resurfacing.
  4. Number of events 63.