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Table 2 Results of proportional hazards, and shared gamma frailty, models for prosthesis failure risk.

From: No bias of ignored bilaterality when analysing the revision risk of knee prostheses: Analysis of a population based sample of 44,590 patients with 55,298 knee prostheses from the national Swedish Knee Arthroplasty Register

 

Proportional hazards model

Shared gamma frailty model

Covariate

HR

95% CI

HR

95% CI

Model 1

    

   Type (UKA vs TKA)

1.84

1.71 – 1.97

1.98

1.83 – 2.14

Model 2

    

   Type (UKA vs TKA)

1.85

1.73 – 1.99

1.94

1.80 – 2.10

   Age (years)

0.97

0.96 – 0.97

0.96

0.96 – 0.97

   Male sex

1.11

1.02 – 1.19

1.10

1.01 – 1.19

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BMC Musculoskeletal Disorders

ISSN: 1471-2474

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