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Table 5 Multiple logistic regression predicting partner’s post-operative physical health (PCS)

From: Patients’ and partners’ health-related quality of life before and 4 months after coronary artery bypass grafting surgery

Partner’s post-op physical health (PCS) (dependent variable)

 

95.0% C.I

 

Beta

S.E.

Wald

d

p

Lower

Upper

Partner pre-op (independent) variables

Step 1: chi square = 27.372, -2 Log Likelihood = 83.53, R = 290, Nagelkerke R 2= .386

PCS

-.137

.035

15.229

1

0.001**

.814

.934

MCS

-.077

.025

.069

1

0.792

.945

1.044

Step 2: chi square =1.524, -2 Log Likelihood =82.011, R = .303, Nagelkerke R 2= .404

PCS

-.152

.038

15.649

1

0.001**

.797

.926

MCS

-.038

.037

1.050

1

0.002*

.895

1.035

EFD

.035

.030

1.379

1

0.306

.977

1.097

Step 3: chi square = 4.384, -2 Log Likelihood = 64.527, R = .403, Nagelkerke R 2= .550

PCS

-.153

.040

14.520

1

0.001**

.793

.938

MCS

-.049

.038

1.664

1

0.197

.884

1.026

EFD

.049

.033

2.255

1

0.133

.984

1.119

Social deprivation

-.939

.923

1.035

1

0.309

.064

2.388

Constant

7.239

2.005

13.032

1

<0.001

-

-

Patient pre-op (independent) variables

Step 1: chi square = 6.876, -2 Log Likelihood = 104.027, R = .082, Nagelkerke R 2= .110

PCS

-.039

.028

1.896

1

0.169

.910

1.017

MCS

-.039

.021

3.421

1

0.064

.923

1.002

Step 2: chi square = .325, -2 Log Likelihood = 103.702, R = .086, Nagelkerke R 2= .115

PCS

-.056

.044

1.591

1

0.207

.867

1.032

MCS

-.045

.025

3.278

1

0.070

.911

1.004

Physical limitation

.010

.018

.320

1

0.571

.975

1.048

Angina freq/severity

-.003

.017

.028

1

0.866

.964

1.032

Constant

3.271

1.411

5.375

1

0.020

-

-

  1. PCS physical component score, MCS mental component score, EFD emotion functional dimension, angina freq/severity angina frequency and severity, PSFD physical and social functional dimension, post-op post-operative, * p < 0.005; ** p < 0.001.