Table 2 Univariate and multivariate analyses of OS in stage IIB-IVA cervical carcinoma patients before and after PSM

  < 65

1 (reference)

1 (reference)

1 (reference)

1 (reference)

  ≥ 65

< 0.001

1.550

1.421

1.691

< 0.001

1.431

1.307

1.566

< 0.001

1.368

1.224

1.529

< 0.001

1.496

1.336

1.675

 Married

1 (reference)

1 (reference)

1 (reference)

1 (reference)

 Unmarried and others

< 0.001

1.294

1.192

1.405

< 0.001

1.178

1.083

1.282

0.001

1.251

1.098

1.425

0.049

1.143

1.001

1.305

 White

1 (reference)

1 (reference)

1 (reference)

1 (reference)

 Black

0.017

1.128

1.022

1.246

0.548

1.031

0.932

1.141

0.030

1.170

1.015

1.348

0.654

1.034

0.894

1.196

 Others

0.008

0.841

0.739

0.956

0.054

0.880

0.773

1.002

0.016

0.811

0.684

0.961

0.219

0.898

0.756

1.066

 SCC

1 (reference)

1 (reference)

1 (reference)

1 (reference)

 Non-SCC

< 0.001

1.375

1.241

1.522

< 0.001

1.406

1.268

1.559

< 0.001

1.327

1.144

1.539

< 0.001

1.383

1.190

1.606

 Well or fairly differentiated

1 (reference)

1 (reference)

1 (reference)

1 (reference)

 Poorly or undifferentiated

< 0.001

1.238

1.130

1.356

< 0.001

1.211

1.105

1.328

0.003

1.223

1.070

1.397

0.002

1.234

1.079

1.411

 Unknown

0.191

1.067

0.968

1.175

0.993

1.000

0.906

1.102

0.803

0.982

0.855

1.129

0.334

0.933

0.811

1.074

  < 60

1 (reference)

1 (reference)

1 (reference)

1 (reference)

  ≥ 60

< 0.001

1.350

1.222

1.490

< 0.001

1.241

1.122

1.372

< 0.001

1.443

1.248

1.668

0.013

1.207

1.041

1.400

 Unknown

< 0.001

1.493

1.351

1.650

< 0.001

1.302

1.177

1.441

< 0.001

1.462

1.273

1.679

0.018

1.187

1.030

1.367

 IIB

1 (reference)

1 (reference)

1 (reference)

1 (reference)

 IIIA

< 0.001

1.827

1.499

2.227

< 0.001

1.529

1.253

1.866

< 0.001

1.695

1.338

2.148

< 0.001

1.541

1.215

1.955

 IIIB

< 0.001

1.889

1.720

2.074

< 0.001

1.881

1.712

2.067

< 0.001

1.799

1.571

2.059

< 0.001

1.763

1.538

2.022

 IVA

< 0.001

3.675

3.191

4.232

< 0.001

3.054

2.645

3.526

< 0.001

3.112

2.568

3.771

< 0.001

2.801

2.298

3.414

 EBRT alone

1 (reference)

1 (reference)

1 (reference)

1 (reference)

 EBRT + BRT

< 0.001

0.557

0.516

0.601

< 0.001

0.648

0.598

0.701

< 0.001

0.542

0.483

0.609

< 0.001

0.635

0.563

0.715

 No/Unknown

1 (reference)

1 (reference)

1 (reference)

1 (reference)

 Yes

< 0.001

0.505

0.456

0.558

< 0.001

0.605

0.545

0.671

< 0.001

0.546

0.485

0.614

< 0.001

0.577

0.510

0.652