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Table 3 Univariate and multivariate Cox regression with backward elimination of clinical variables for predicting recurrence after AF ablation

From: Decreased estimated glomerular filtration rate predicts long-term recurrence after catheter ablation of atrial fibrillation in mild to moderate renal insufficiency

 

Hazard ratio

Lower 95% CI

Upper 95% CI

P value

Univariate

Age, years

1.004

0.983

1.026

0.718

Gender

    

 Male (ref.)

    

 Female

1.258

0.821

1.926

0.291

Persistent AF

    

 No (ref.)

    

 Yes

1.437

0.976

2.115

0.066

History of AF

1.235

1.026

1.486

0.025

Hypertension

    

 No (ref.)

    

 Yes

0.924

0.625

1.367

0.693

Diabetes

    

 No (ref.)

    

 Yes

0.572

0.248

1.317

0.189

Coronary heart disease

    

 No (ref.)

    

 Yes

0.778

0.389

1.554

0.477

Ischaemic stroke

    

 No (ref.)

    

 Yes

1.336

0.648

2.756

0.433

CCr, ml/min

0.935

0.920

0.951

 < 0.001

eGFR, ml/min/1.732

0.955

0.941

0.970

 < 0.001

CHADS2 score

0.917

0.738

1.140

0.437

CHA2DS2-VASc score

0.997

0.846

1.177

0.976

R2CHADS2 score

0.996

0.959

1.035

0.849

Produce time, h

2.350

1.542

3.582

 < 0.001

Exposure time, s

0.997

0.981

1.013

0.706

Ablation time, min

0.995

0.976

1.014

0.586

LAD, mm

1.319

1.209

1.439

 < 0.001

LAV, ml

1.327

1.257

1.401

 < 0.001

LAVI, ml/m2

1.323

1.251

1.400

 < 0.001

LVEF, %

0.950

0.921

0.981

0.002

Multivariate (backward elimination)

eGFR, ml/min/1.732

0.930

0.912

0.947

 < 0.001

LAD, mm

1.751

1.459

2.102

 < 0.001

LAV, ml

1.342

1.203

1.497

 < 0.001

LAVI, ml/m2

1.379

1.186

1.602

 < 0.001