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Table 3 Factors associated with wait time for consultation in hip and knee replacement surgery

From: A single-entry model and wait time for hip and knee replacement in eastern health region of Newfoundland and Labrador 2011–2019

Variables

Hip replacement surgery (n = 806)

Knee replacement surgery (n = 1153)

Unadjusted Hazard Ratios

Adjusted Hazard Ratiosa

Unadjusted Hazard Ratios

Adjusted Hazard Ratiosa

HR

95% CI

p

HR

95% CI

p

HR

95% CI

p

HR

95% CI

p

Age group*WT1

        

0.0344

   

WT1 = 0 day

  

0.0086*

  

0.8034*

     

0.9088*

  < 65

0.830

0.722–0.954

 

1.018

0.883–1.175

 

0.682

0.551–0.843

 

1.007

0.895–1.133

 

  ≥ 65

            

WT1 = 90 days

            

  < 65

      

0.796

0.705–0.899

    

  ≥ 65

            

Diagnosis

  

0.3204

  

0.2159

  

0.0484

  

0.3707

 Osteoarthritis

1.117

0.898–1.389

 

0.869

0.695–1.086

 

1.202

1.001–1.444

 

0.917

0.759–1.108

 

 Others

            

Patient’s preference

  

0.4133

  

0.0015

  

0.2651

  

<.0001

 Next available

1.066

0.914–1.244

 

1.296

1.104–1.522

 

0.932

0.824–1.055

 

1.461

1.284–1.662

 

 Specific surgeon

            

Initial referral form*WT1

  

0.0002

     

0.0002

  

0.0080

WT1 = 0 day

     

0.0384**

      

 Incomplete

0.125

0.043–0.363

 

0.676

0.467–0.979

 

0.363

0.217–0.608

 

0.415

0.237–0.727

 

 Complete

            

WT1 = 90 days

 Incomplete

0.673

0.460–0.984

    

0.652

0.491–0.866

 

0.659

0.488–0.890

 

 Complete

            

Year of referralb*WT1

  

<.0001

  

<.0001

  

<.0001

  

<.0001

WT1 = 0 day

 2011–2013

0.184

0.127–0.268

 

0.137

0.093–0.202

 

0.212

0.159–0.283

 

0.257

0.189–0.351

 

 2014–2016

0.762

0.554–1.047

 

0.977

0.711–1.343

 

0.754

0.582–0.977

 

0.885

0.684–1.145

 

 2017–2019

            

WT1 = 90 days

 2011–2013

0.384

0.314–0.471

 

0.284

0.227–0.355

 

0.422

0.356–0.500

 

0.450

0.372–0.544

 

 2014–2016

0.705

0.585–0.851

 

0.830

0.686–1.004

 

0.878

0.758–1.018

 

0.942

0.812–1.094

 

 2017–2019

            

Priority*WT1

  

<.0001

  

<.0001

  

<.0001

  

<.0001

WT1 = 0 day

 P1

109.700

37.250–323.063

 

165.240

53.749–507.997

 

288.827

119.308–699.210

 

451.547

184.066–1107.723

 

 P2

20.253

7.354–55.776

 

15.746

5.492–45.147

 

47.870

22.666–101.100

 

36.533

16.978–78.613

 

 P3

            

WT1 = 90 days

 P1

11.696

7.101–19.263

 

21.831

12.934–36.848

 

14.782

10.272–21.270

 

24.428

16.722–35.684

 

 P2

11.165

7.012–17.780

 

10.764

6.619–17.504

 

15.596

11.519–21.116

 

15.635

11.421–21.404

 

 P3

            
  1. a Extended Cox proportional hazard model adjusted for age group, diagnosis, patient’s preference, initial referral form, year of referral, priority, and their interaction with time, where applicable; b The year when a patient was referred to the OCI for a hip or knee replacement surgery assessment
  2. * p-value for age group
  3. ** p-value for initial referral form
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BMC Health Services Research

ISSN: 1472-6963

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