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Epistemic community formation: a bibliometric study of recurring authors in medical journals

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Abstract

Using a selection of general science journals, general medical journals and specialized medical journals, this paper analyses four indicators of epistemic community formation: Synchronous, diachronous, immediate, and continuants. The analyses show that the specialized medical journals display higher levels of epistemic community formation as measured by the percentage of recurring authors. There are only slight differences in the results across analyses of the four indicators. Yet, the analyses of each indicator illustrate different levels of variance. The results further indicate that the level of epistemic community formation, as measured by the percentage of recurring authors, is closely tied to specialization, and could therefore also be considered as yet another indicator of specialization.

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Correspondence to Jeppe Nicolaisen.

Appendix 1

Appendix 1

Data for each journal is listed below.

Y: Year; N: Number of publications (articles; reviews; notes); A: Number of authors with at least one paper in the journal in Y; Y − 3: Number of authors with at least one paper in the journal in Y and at least one paper in the same journal the preceding 3 years; Y − 3(%): Percentage of authors with at least one paper in the journal in Y and at least one paper in the same journal the preceding 3 years; Y + 3: Number of authors with at least one paper in the journal in Y and at least one paper in the same journal the succeeding 3 years; Y + 3(%): Percentage of authors with at least one paper in the journal in Y and at least one paper in the same journal the succeeding 3 years; Cont.: Number of continuants (authors with at least one paper in the journal in Y, at least one paper in the same journal the preceding 3 years, and at least one paper in the same journal the succeeding 3 years); Cont.(%): Percentage of continuants.

American Journal of Ophthalmology

Y

N

A

Y − 3

Y − 3 (%)

Y + 3

Y + 3(%)

Y + 1

Y + 1 (%)

Cont

Cont. (%)

1997

316

1158

353

30.484

194

16.753

1998

294

1139

425

37.313

223

19.579

1999

330

1309

610

46.600

335

25.592

2000

344

1443

532

36.868

612

42.412

400

27.720

368

25.502

2001

377

1709

662

38.736

571

33.411

318

18.607

335

19.602

2002

363

1393

518

37.186

537

38.550

326

23.403

337

24.192

2003

437

1634

573

35.067

595

36.414

364

22.277

356

21.787

2004

458

1687

599

35.507

634

37.582

384

22.762

374

22.170

2005

461

1799

617

34.297

678

37.688

406

22.568

388

21.568

2006

463

1759

651

37.010

602

34.224

391

22.229

367

20.864

2007

392

1704

670

39.319

481

28.228

282

16.549

316

18.545

2008

281

1254

488

38.915

471

37.560

289

23.046

270

21.531

2009

267

1202

500

41.597

404

33.611

240

19.967

264

21.963

2010

241

1138

428

37.610

421

36.995

233

20.475

256

22.496

2011

269

1198

413

34.474

457

38.147

275

22.955

266

22.204

2012

271

1348

426

31.602

474

35.163

224

16.617

255

18.917

2013

298

1365

434

31.795

542

39.707

298

21.832

261

19.121

2014

326

1558

487

31.258

540

34.660

317

20.347

283

18.164

2015

294

2245

588

26.192

1045

46.548

803

35.768

377

16.793

2016

275

2071

1048

50.604

666

32.158

323

15.596

412

19.894

2017

263

1717

548

31.916

561

32.673

319

18.579

317

18.462

2018

287

2229

598

26.828

443

19.874

2019

297

2085

767

36.787

452

21.679

2020

321

2096

828

39.504

Annals of Internal Medicine

Y

N

A

Y − 3

Y − 3 (%)

Y + 3

Y + 3 (%)

Y + 1

Y + 1 (%)

Cont

Cont .(%)

1997

317

1258

229

18.203

113

8.983

1998

319

1340

234

17.463

118

8.806

1999

279

1051

221

21.028

107

10.181

2000

285

1132

207

18.286

205

18.110

79

6.979

86

7.597

2001

326

1117

207

18.532

217

19.427

77

6.893

96

8.594

2002

339

1092

191

17.491

199

18.223

100

9.158

90

8.242

2003

460

1125

235

20.889

245

21.778

107

9.511

116

10.311

2004

457

1280

237

18.516

244

19.063

124

9.688

109

8.516

2005

391

1093

237

21.683

220

20.128

95

8.692

106

9.698

2006

273

1162

230

19.793

215

18.503

86

7.401

103

8.864

2007

262

1375

200

14.545

253

18.400

126

9.164

100

7.273

2008

248

1973

261

13.229

218

11.049

112

5.677

108

5.474

2009

309

1336

241

18.039

232

17.365

99

7.410

99

7.410

2010

410

1254

187

14.912

272

21.691

121

9.649

107

8.533

2011

446

1254

261

20.813

334

26.635

160

12.759

152

12.121

2012

458

1455

296

20.344

337

23.162

165

11.340

146

10.034

2013

624

1945

352

18.098

420

21.594

233

11.979

179

9.203

2014

481

1491

396

26.559

388

26.023

221

14.822

206

13.816

2015

444

1784

412

23.094

413

23.150

230

12.892

212

11.883

2016

398

1804

387

21.452

353

19.568

213

11.807

202

11.197

2017

505

1886

413

21.898

360

19.088

198

10.498

199

10.551

2018

489

1827

349

19.102

179

9.797

2019

584

2028

325

16.026

224

11.045

2020

624

2243

431

19.215

British Journal of Ophthalmology

Y

N

A

Y − 3

Y − 3 (%)

Y + 3

Y + 3 (%)

Y + 1

Y + 1 (%)

Cont

Cont. (%)

1997

199

693

209

30.159

108

15.584

1998

243

879

289

32.878

164

18.658

1999

236

939

321

34.185

160

17.039

2000

265

1014

209

30.159

312

30.769

165

16.272

165

16.272

2001

292

1090

289

32.878

313

28.716

181

16.606

154

14.128

2002

288

1150

321

34.185

391

34.000

197

17.130

207

18.000

2003

295

1175

312

30.769

425

36.170

220

18.723

211

17.957

2004

337

1384

313

28.716

454

32.803

216

15.607

240

17.341

2005

327

1464

391

34.000

442

30.191

251

17.145

218

14.891

2006

327

1537

425

36.170

448

29.148

273

17.762

247

16.070

2007

346

1541

454

32.803

542

35.172

290

18.819

277

17.975

2008

341

1542

442

30.191

472

30.610

266

17.250

259

16.796

2009

338

1668

448

29.148

459

27.518

218

13.070

263

15.767

2010

314

1444

542

35.172

387

26.801

231

15.997

213

14.751

2011

326

1684

472

30.610

422

25.059

207

12.292

234

13.895

2012

288

1334

459

27.518

379

28.411

208

15.592

209

15.667

2013

291

1510

387

26.801

450

29.801

234

15.497

215

14.238

2014

330

1658

422

25.059

442

26.659

265

15.983

196

11.821

2015

316

1899

379

28.411

528

27.804

277

14.587

264

13.902

2016

328

1707

450

29.801

529

30.990

310

18.161

247

14.470

2017

308

1689

442

26.659

585

34.636

287

16.992

306

18.117

2018

296

1685

528

27.804

319

18.932

2019

318

1939

529

30.990

428

22.073

2020

363

2860

585

34.636

British Medical Journal

Y

N

A

Y − 3

Y − 3 (%)

Y + 3

Y + 3 (%)

Y + 1

Y + 1 (%)

Cont

Cont. (%)

1997

1141

2071

509

24.577

244

11.782

1998

1584

2307

514

22.280

290

12.570

1999

1701

2199

526

23.920

272

12.369

2000

1496

2210

514

23.258

535

24.208

289

13.077

290

13.122

2001

1804

2186

526

24.062

507

23.193

277

12.672

275

12.580

2002

1740

2277

534

23.452

581

25.516

321

14.097

293

12.868

2003

1887

2581

546

21.155

592

22.937

346

13.406

325

12.592

2004

1816

2496

604

24.199

526

21.074

305

12.220

290

11.619

2005

1586

2568

567

22.079

497

19.354

292

11.371

258

10.047

2006

1320

2056

520

25.292

399

19.407

165

8.025

223

10.846

2007

778

1620

375

23.148

375

23.148

160

9.877

211

13.025

2008

821

2366

335

14.159

439

18.555

223

9.425

197

8.326

2009

1070

2675

487

18.206

568

21.234

287

10.729

245

9.159

2010

1180

2743

510

18.593

599

21.837

306

11.156

263

9.588

2011

729

2585

558

21.586

580

22.437

298

11.528

273

10.561

2012

783

2745

589

21.457

551

20.073

263

9.581

276

10.055

2013

859

2719

519

19.088

581

21.368

285

10.482

277

10.188

2014

905

2876

579

20.132

546

18.985

296

10.292

256

8.901

2015

1120

2890

619

21.419

523

18.097

268

9.273

270

9.343

2016

935

2260

542

23.982

531

23.496

274

12.124

268

11.858

2017

819

2093

485

23.172

405

19.350

232

11.085

223

10.655

2018

807

2952

511

17.310

322

10.908

2019

927

3110

527

16.945

288

9.260

2020

879

3091

528

17.082

Experimental Eye Research

Y

N

A

Y − 3

Y − 3 (%)

Y + 3

Y + 3 (%)

Y + 1

Y + 1 (%)

Cont

Cont. (%)

1997

198

784

224

28.571

111

14.158

1998

150

595

158

26.555

87

14.622

1999

145

579

170

29.361

88

15.199

2000

144

593

151

25.464

134

22.597

62

10.455

68

11.467

2001

152

649

156

24.037

193

29.738

77

11.864

82

12.635

2002

142

642

149

23.209

186

28.972

99

15.421

86

13.396

2003

158

678

214

31.563

213

31.416

105

15.487

109

16.077

2004

194

758

183

24.142

249

32.850

115

15.172

108

14.248

2005

176

834

202

24.221

243

29.137

162

19.424

92

11.031

2006

297

1341

304

22.670

366

27.293

184

13.721

151

11.260

2007

217

1011

293

28.981

283

27.992

144

14.243

144

14.243

2008

181

869

271

31.185

248

28.539

141

16.226

123

14.154

2009

255

1153

307

26.626

261

22.637

144

12.489

144

12.489

2010

204

931

262

28.142

231

24.812

131

14.071

115

12.352

2011

171

819

253

30.891

186

22.711

74

9.035

111

13.553

2012

173

859

157

18.277

237

27.590

103

11.991

79

9.197

2013

241

1211

208

17.176

288

23.782

145

11.974

97

8.010

2014

241

1235

288

23.320

306

24.777

151

12.227

146

11.822

2015

189

957

284

29.676

267

27.900

148

15.465

139

14.525

2016

248

1357

321

23.655

329

24.245

115

8.475

150

11.054

2017

183

921

225

24.430

227

24.647

111

12.052

118

12.812

2018

247

1481

283

19.109

202

13.639

2019

327

1964

365

18.585

190

9.674

2020

317

1790

333

18.603

Investigative Ophthalmology & Visual Science

Y

N

A

Y − 3

Y − 3 (%)

Y + 3

Y + 3 (%)

Y + 1

Y + 1 (%)

Cont

Cont. (%)

1997

3493

9143

1380

15.094

587

6.420

1998

348

1226

524

42.741

272

22.186

1999

445

1536

644

41.927

388

25.260

2000

580

1930

898

46.528

809

41.917

417

21.606

563

29.171

2001

471

1772

661

37.302

802

45.260

400

22.573

438

24.718

2002

503

1996

716

35.872

872

43.687

541

27.104

485

24.299

2003

702

2669

974

36.493

1129

42.300

623

23.342

608

22.780

2004

593

2495

986

39.519

1071

42.926

616

24.689

626

25.090

2005

630

2779

1025

36.884

1144

41.166

641

23.066

663

23.858

2006

704

3310

1114

33.656

1322

39.940

740

22.356

758

22.900

2007

724

3324

1245

37.455

1335

40.162

736

22.142

787

23.676

2008

717

3250

1248

38.400

1425

43.846

784

24.123

821

25.262

2009

763

3496

1391

39.788

1616

46.224

900

25.744

957

27.374

2010

887

4045

1533

37.899

1835

45.365

1260

31.150

1076

26.601

2011

1208

5452

2028

37.197

2139

39.233

1287

23.606

1251

22.946

2012

1025

4509

1844

40.896

1858

41.206

1124

24.928

1157

25.660

2013

1047

4559

1887

41.391

1911

41.917

1171

25.685

1158

25.400

2014

993

4544

1946

42.826

1712

37.676

1008

22.183

1102

24.252

2015

939

4655

1781

38.260

1688

36.262

981

21.074

1036

22.256

2016

848

4158

1658

39.875

1544

37.133

903

21.717

964

23.184

2017

740

4337

1614

37.215

1406

32.419

870

20.060

846

19.507

2018

680

3997

1561

39.054

661

16.537

2019

539

3258

1209

37.109

601

18.447

2020

516

3234

1165

36.024

JAMA Ophthalmology

Y

N

A

Y − 3

Y − 3 (%)

Y + 3

Y + 3 (%)

Y + 1

Y + 1 (%)

Cont

Cont. (%)

1997

308

1097

351

31.996

196

17.867

1998

309

1004

336

33.466

149

14.841

1999

273

933

323

34.620

174

18.650

2000

276

1258

360

28.617

395

31.399

215

17.091

223

17.727

2001

269

1467

395

26.926

404

27.539

211

14.383

243

16.564

2002

293

1271

366

28.796

402

31.629

225

17.703

236

18.568

2003

314

1297

412

31.766

408

31.457

198

15.266

240

18.504

2004

302

1149

380

33.072

315

27.415

177

15.405

215

18.712

2005

261

1082

376

34.750

299

27.634

160

14.787

209

19.316

2006

266

1138

326

28.647

315

27.680

159

13.972

169

14.851

2007

268

1080

291

26.944

351

32.500

202

18.704

177

16.389

2008

240

1378

361

26.197

382

27.721

202

14.659

213

15.457

2009

245

1027

346

33.690

369

35.930

188

18.306

204

19.864

2010

253

1206

370

30.680

409

33.914

223

18.491

223

18.491

2011

266

1168

385

32.962

383

32.791

222

19.007

205

17.551

2012

327

1315

434

33.004

453

34.449

218

16.578

272

20.684

2013

260

1136

379

33.363

345

30.370

208

18.310

214

18.838

2014

270

1285

405

31.518

497

38.677

325

25.292

254

19.767

2015

297

1646

509

30.923

475

28.858

261

15.857

263

15.978

2016

298

1223

412

33.688

456

37.285

287

23.467

256

20.932

2017

304

1541

486

31.538

601

39.001

452

29.332

275

17.846

2018

289

1868

657

35.171

238

12.741

2019

318

1399

385

27.520

251

17.941

2020

266

1186

429

36.172

Journal of Clinical Oncology

Y

N

A

Y − 3

Y − 3 (%)

Y + 3

Y + 3 (%)

Y + 1

Y + 1 (%)

Cont

Cont. (%)

1997

426

3180

1253

39.403

717

22.547

1998

493

3496

1463

41.848

838

23.970

1999

467

3608

1533

42.489

821

22.755

2000

486

3571

1412

39.541

1527

42.761

870

24.363

944

26.435

2001

514

4179

1564

37.425

1674

40.057

842

20.148

995

23.810

2002

548

4064

1504

37.008

1796

44.193

982

24.163

1044

25.689

2003

634

4775

1804

37.780

2147

44.963

993

20.796

1277

26.743

2004

614

4591

1673

36.441

1963

42.758

1325

28.861

1155

25.158

2005

1042

7356

2574

34.992

2773

37.697

1467

19.943

1664

22.621

2006

740

5597

2177

38.896

2363

42.219

1292

23.084

1492

26.657

2007

772

5538

2318

41.856

2487

44.908

1337

24.142

1598

28.855

2008

817

5887

2454

41.685

2555

43.401

1557

26.448

1645

27.943

2009

825

7042

2796

39.705

2822

40.074

1713

24.325

1751

24.865

2010

798

6740

2709

40.193

2537

37.641

1392

20.653

1709

25.356

2011

808

6385

2454

38.434

2171

34.002

1279

20.031

1461

22.882

2012

660

5665

2381

42.030

2035

35.922

1119

19.753

1329

23.460

2013

630

5772

2139

37.058

1990

34.477

1006

17.429

1286

22.280

2014

515

4638

1902

41.009

1755

37.840

953

20.548

1181

25.464

2015

520

4980

1937

38.896

1826

36.667

1089

21.867

1208

24.257

2016

508

5540

1965

35.469

1757

31.715

967

17.455

1088

19.639

2017

401

4512

1749

38.763

1502

33.289

749

16.600

991

21.964

2018

334

3886

1462

37.622

544

13.999

2019

306

3563

1234

34.634

647

18.159

2020

378

4873

1505

30.884

Journal of the American Medical Association

Y

N

A

Y − 3

Y − 3 (%)

Y + 3

Y + 3 (%)

Y + 1

Y + 1 (%)

Cont

Cont. (%)

1997

1082

2474

574

23.201

341

13.783

1998

945

2509

552

22.001

225

8.968

1999

670

2253

500

22.193

240

10.652

2000

697

2424

540

22.277

525

21.658

294

12.129

259

10.685

2001

650

2678

576

21.509

465

17.364

264

9.858

217

8.103

2002

633

2629

535

20.350

533

20.274

226

8.596

255

9.700

2003

705

1869

390

20.867

385

20.599

199

10.647

197

10.540

2004

651

2488

482

19.373

561

22.548

292

11.736

270

10.852

2005

676

3227

518

16.052

536

16.610

273

8.460

253

7.840

2006

481

2215

516

23.296

448

20.226

219

9.887

250

11.287

2007

472

2559

493

19.265

447

17.468

246

9.613

232

9.066

2008

489

2146

482

22.460

492

22.926

250

11.650

262

12.209

2009

530

2523

461

18.272

527

20.888

250

9.909

236

9.354

2010

533

2423

494

20.388

456

18.820

216

8.915

222

9.162

2011

541

2330

453

19.442

489

20.987

237

10.172

195

8.369

2012

390

2684

534

19.896

565

21.051

182

6.781

234

8.718

2013

437

2669

385

14.425

439

16.448

214

8.018

169

6.332

2014

511

5018

576

11.479

700

13.950

360

7.174

243

4.843

2015

585

4274

629

14.717

523

12.237

220

5.147

219

5.124

2016

550

3730

509

13.646

554

14.853

303

8.123

220

5.898

2017

510

4036

622

15.411

613

15.188

321

7.953

295

7.309

2018

614

3735

591

15.823

249

6.667

2019

590

3302

513

15.536

273

8.268

2020

790

3356

597

17.789

Journal of the National Cancer Institute

Y

N

A

Y − 3

Y − 3 (%)

Y + 3

Y + 3 (%)

Y + 1

Y + 1 (%)

Cont

Cont. (%)

1997

382

1197

339

28.321

189

15.789

1998

344

1189

297

24.979

185

15.559

1999

373

1340

307

22.910

185

13.806

2000

357

1262

321

25.436

348

27.575

177

14.025

184

14.580

2001

375

1238

291

23.506

279

22.536

151

12.197

162

13.086

2002

308

1288

313

24.301

379

29.425

186

14.441

181

14.053

2003

396

1558

335

21.502

428

27.471

198

12.709

190

12.195

2004

422

1433

351

24.494

357

24.913

203

14.166

166

11.584

2005

404

1913

425

22.216

490

25.614

285

14.898

222

11.605

2006

308

1626

471

28.967

417

25.646

217

13.346

247

15.191

2007

281

1303

401

30.775

306

23.484

179

13.738

194

14.889

2008

260

1584

383

24.179

370

23.359

155

9.785

203

12.816

2009

246

1226

303

24.715

351

28.630

210

17.129

185

15.090

2010

286

1543

401

25.988

429

27.803

243

15.749

240

15.554

2011

287

1565

431

27.540

439

28.051

204

13.035

236

15.080

2012

266

1364

333

24.413

449

32.918

213

15.616

238

17.449

2013

261

1737

423

24.352

518

29.822

260

14.968

273

15.717

2014

283

2365

503

21.268

588

24.863

410

17.336

302

12.770

2015

272

2646

708

26.757

651

24.603

390

14.739

307

11.602

2016

209

2095

569

27.160

463

22.100

236

11.265

265

12.649

2017

238

1908

462

24.214

395

20.702

179

9.382

209

10.954

2018

175

1802

379

21.032

248

13.762

2019

173

2014

529

26.266

278

13.803

2020

137

1580

441

27.911

Lancet

Y

N

A

Y − 3

Y − 3 (%)

Y + 3

Y + 3 (%)

Y + 1

Y + 1 (%)

Cont

Cont. (%)

1997

1998

1999

2000

2001

2002

2003

2004

2005

2006

2007

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

2018

2019

2020

1463

1756

1839

1678

1674

1391

1396

1285

1086

998

934

980

960

961

946

1013

958

976

1053

962

804

805

817

689

4535

5522

5717

4635

5391

4136

4998

4943

4215

3917

3255

5554

4573

6054

5253

6515

4453

5407

6842

7247

10,211

14,223

16,697

15,055

932

939

801

833

738

723

626

648

703

890

1002

1495

1149

959

1039

1971

1849

2826

3028

2905

3870

20.108

17.418

19.367

16.667

14.930

17.153

15.982

19.908

12.658

19.462

16.551

28.460

17.636

21.536

19.216

28.807

25.514

27.676

21.289

17.398

25.706

956

1004

970

859

856

729

644

717

702

628

829

926

929

1680

1050

1382

1021

1615

2373

2992

3574

21.080

18.182

16.967

18.533

15.878

17.626

12.885

14.505

16.655

16.033

25.469

16.673

20.315

27.750

19.989

21.213

22.928

29.869

34.683

41.286

35.001

471

543

482

472

400

356

342

397

310

287

341

437

507

1094

573

487

481

1135

1305

2220

1926

2006

1442

10.386

9.833

8.431

10.183

7.420

8.607

6.843

8.032

7.355

7.327

10.476

7.868

11.087

18.071

10.908

7.475

10.802

20.991

19.073

30.633

18.862

14.104

8.636

438

389

348

307

308

292

298

351

395

437

527

527

644

544

691

1189

1242

1968

9.450

7.216

8.414

6.142

6.231

6.928

7.608

10.783

7.112

9.556

8.705

10.032

9.885

12.216

12.780

17.378

17.138

19.273

Nature

Y

N

A

Y − 3

Y − 3 (%)

Y + 3

Y + 3 (%)

Y + 1

Y + 1 (%)

Cont

Cont. (%)

1997

1998

1999

2000

2001

2002

2003

2004

2005

2006

2007

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

2018

2019

2020

2241

2062

1723

1992

1851

1784

1772

1808

1936

1642

1507

1563

1559

1674

1853

1978

2051

1707

1734

2318

2296

2370

2175

2519

5457

4931

5502

6752

6282

6630

6144

8894

8291

7685

8014

8245

8537

10,156

11,003

13,392

10,759

12,609

17,211

12,934

16,461

13,404

17,263

24,341

1127

1207

1306

1251

1638

1916

1882

1813

1733

1663

2327

2644

3226

2709

3138

3436

3257

3846

2686

3263

5716

16.691

19.214

19.698

20.361

18.417

23.109

24.489

22.623

21.019

19.480

22.913

24.030

24.089

25.179

24.887

19.964

25.182

23.364

20.039

18.902

23.483

1027

1002

1209

1188

1535

1458

1543

2008

2026

1683

1802

2022

2041

2911

3123

3930

2724

3203

3741

3365

3930

18.820

20.320

21.974

17.595

24.435

21.991

25.114

22.577

24.436

21.900

22.486

24.524

23.908

28.663

28.383

29.346

25.318

25.402

21.736

26.017

23.875

499

457

592

576

711

565

767

1013

992

763

810

853

1061

1620

1919

1657

1333

1566

1769

1747

1313

1316

2992

9.144

9.268

10.760

8.531

11.318

8.522

12.484

11.390

11.965

9.928

10.107

10.346

12.428

15.951

17.441

12.373

12.390

12.420

10.278

13.507

7.976

9.818

17.332

464

584

612

686

833

929

784

732

802

791

1144

1423

1796

1359

1573

1591

1446

1707

6.872

9.296

9.231

11.165

9.366

11.205

10.202

9.134

9.727

9.266

11.264

12.933

13.411

12.631

12.475

9.244

11.180

10.370

New England Journal of Medicine

Y

N

A

Y − 3

Y − 3 (%)

Y + 3

Y + 3 (%)

Y + 1

Y + 1 (%)

Cont

Cont. (%)

1997

1998

1999

2000

2001

2002

2003

2004

2005

2006

2007

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

2018

2019

2020

702

720

697

612

570

520

723

797

618

556

669

650

752

623

590

559

785

784

676

643

631

703

686

769

2644

2830

2958

2509

2566

2586

3473

3177

3127

4210

3645

6012

4777

4605

5031

11,500

9928

5928

8957

7034

12,280

7877

7379

6239

386

380

372

428

499

498

564

599

760

668

839

863

1317

1804

1148

1955

1556

2084

2081

1813

1038

15.385

14.809

14.385

12.324

15.707

15.926

13.397

16.433

12.641

13.984

18.219

17.154

11.452

18.171

19.366

21.827

22.121

16.971

26.419

24.570

16.637

419

387

374

372

385

447

576

575

551

705

688

777

923

1018

1287

2322

1582

1242

2238

1470

2142

15.847

13.675

12.644

14.827

15.004

17.285

16.585

18.099

17.621

16.746

18.875

12.924

19.322

22.106

25.581

20.191

15.935

20.951

24.986

20.898

17.443

160

146

162

148

172

185

254

226

209

283

325

308

369

420

684

1211

533

584

756

747

1242

853

476

6.051

5.159

5.477

5.899

6.703

7.154

7.314

7.114

6.684

6.722

8.916

5.123

7.725

9.121

13.596

10.530

5.369

9.852

8.440

10.620

10.114

10.829

6.451

148

152

160

191

223

217

269

282

303

338

413

453

646

732

534

1025

699

857

5.899

5.924

6.187

5.500

7.019

6.940

6.390

7.737

5.040

7.076

8.969

9.004

5.617

7.373

9.008

11.444

9.937

6.979

Ophthalmology

Y

N

A

Y − 3

Y − 3 (%)

Y + 3

Y + 3 (%)

Y + 1

Y + 1 (%)

Cont

Cont. (%)

1997

312

1204

505

41.944

278

23.090

1998

342

1523

530

34.800

317

20.814

1999

362

1426

521

36.536

295

20.687

2000

340

1313

498

37.928

506

38.538

298

22.696

312

23.762

2001

365

1456

540

37.088

534

36.676

324

22.253

324

22.253

2002

368

1402

525

37.447

554

39.515

338

24.108

313

22.325

2003

374

1664

557

33.474

487

29.267

299

17.969

284

17.067

2004

336

1521

518

34.057

512

33.662

297

19.527

307

20.184

2005

326

1339

474

35.400

560

41.822

354

26.438

316

23.600

2006

328

1428

555

38.866

563

39.426

300

21.008

351

24.580

2007

332

1445

537

37.163

553

38.270

322

22.284

335

23.183

2008

331

1483

542

36.548

556

37.492

334

22.522

323

21.780

2009

335

1560

578

37.051

634

40.641

347

22.244

370

23.718

2010

324

1618

594

36.712

643

39.740

387

23.918

371

22.930

2011

338

1686

632

37.485

672

39.858

376

22.301

392

23.250

2012

348

1838

622

33.841

722

39.282

421

22.905

423

23.014

2013

357

1820

724

39.780

765

42.033

446

24.505

455

25.000

2014

328

1837

748

40.719

703

38.269

452

24.605

426

23.190

2015

353

3043

793

26.060

1135

37.299

493

16.201

490

16.103

2016

340

2021

767

37.952

704

34.834

344

17.021

433

21.425

2017

262

1471

561

38.137

588

39.973

395

26.852

333

22.638

2018

265

3585

1144

31.911

1403

39.135

2019

224

2825

1649

58.372

386

13.664

2020

189

1387

547

39.438

Science

Y

N

A

Y − 3

Y − 3 (%)

Y + 3

Y + 3 (%)

Y + 1

Y + 1 (%)

Cont

Cont. (%)

1997

1998

1999

2000

2001

2002

2003

2004

2005

2006

2007

2008

2009

2010

2011

2012

2013

2014

2015

2016

2017

2018

2019

2020

2338

1947

1416

1542

1617

1569

1773

1815

1768

1705

1335

1329

1376

1342

1118

1138

1010

1153

1379

1416

1293

2575

2545

2701

5006

4862

4788

4910

5505

5595

6250

6655

7016

7217

7101

6744

8010

8844

7800

7345

8945

9334

9937

9320

9310

12,018

11,016

12,719

944

1062

1034

1048

1073

1197

1457

1302

1496

1756

1671

1629

1541

1773

1552

1765

1872

1540

2098

1807

1956

19.226

19.292

18.481

16.768

16.123

17.061

20.188

18.335

22.183

21.923

18.894

20.885

20.980

19.821

16.627

17.762

20.086

16.541

17.457

16.403

15.379

1041

925

905

1060

1180

1064

1175

1243

1450

1582

1487

1647

1553

1777

1581

1618

1767

1764

2014

1697

1830

20.795

19.025

18.901

21.589

21.435

19.017

18.800

18.678

20.667

21.920

20.941

24.422

19.388

20.093

20.269

22.029

19.754

18.899

20.268

18.208

19.656

501

449

463

599

589

478

497

567

777

628

677

928

843

924

844

873

891

918

1013

725

988

911

978

10.008

9.235

9.670

12.200

10.699

8.543

7.952

8.520

11.075

8.702

9.534

13.760

10.524

10.448

10.821

11.886

9.961

9.835

10.194

7.779

10.612

7.580

8.878

440

512

441

473

472

521

660

586

674

765

720

712

774

769

703

728

744

647

8.961

9.301

7.882

7.568

7.092

7.426

9.145

8.252

9.994

9.551

8.141

9.128

10.538

8.597

7.532

7.326

7.983

6.950

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Nicolaisen, J., Frandsen, T.F. Epistemic community formation: a bibliometric study of recurring authors in medical journals. Scientometrics 127, 4167–4189 (2022). https://doi.org/10.1007/s11192-022-04409-3

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  • DOI: https://doi.org/10.1007/s11192-022-04409-3

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